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Start on Cloud

A unified distributed database ready for your transactional, analytical, and AI workloads.

DEPLOY YOUR WAY

OceanBase Cloud

The best way to deploy and scale OceanBase

OceanBase Enterprise

Run and manage OceanBase on your infra

TRY OPEN SOURCE

OceanBase Community Edition

The free, open-source distributed database

OceanBase seekdb

Open source AI native search database

Customer Stories

Real-world success stories from enterprises across diverse industries.

View All
BY USE CASES

Mission-Critical Transactions

Global & Multicloud Application

Elastic Scaling for Peak Traffic

Real-time Analytics

Active Geo-redundancy

Database Consolidation

Comprehensive knowledge hub for OceanBase.

Blog

Live Demos

Training & Certification

Documentation

Official technical guides, tutorials, API references, and manuals for all OceanBase products.

View All
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OceanBase Database

SQL - V4.3.5

  • Documentation updates
  • What's New
  • What is OceanBase Database
    • Overview
    • Differences between Enterprise Edition and Community Edition
    • System architecture
    • Compatibility with Oracle
      • Overview
      • SQL data types
      • Built-in functions
      • System views
    • Compatibility with MySQL
    • Limitations
  • Get Started
    • Quick start with OceanBase Database Community Edition
    • Learn OceanBase SQL
      • Before you begin
      • Basic SQL operations (MySQL mode)
      • Basic SQL operations (Oracle mode)
    • Build a sample application (MySQL mode)
      • Build a Python application
      • Build a Java application
      • Build a C application
      • Build a Go application
    • Build a sample application (Oracle mode)
      • Build a Java application
      • Build a C application
    • Try out advanced features of OceanBase Database
      • Scalable OLTP
        • Run the TPC-C benchmark in OceanBase Database
        • Try out the hot row update capability of OceanBase Database
      • Try out operational OLAP
      • Try out parallel import and data compression
      • Try out the multi-tenant feature
    • Video tutorial
  • Develop
    • Develop applications (MySQL mode)
      • Connect to OceanBase Database
        • Overview
        • Connect to an OceanBase tenant by using the mysql client
        • Connect to an OceanBase tenant by using OBClient
        • Connect to OceanBase Database by using ODC
        • Connect to OceanBase Database by using DBeaver
        • Connect to OceanBase Database by using Navicat
        • Use database connection pool
          • Database connection pool configuration
          • Tomcat
          • c3p0
          • Proxool
          • HikariCP
          • DBCP
          • Commons Pool
          • Druid
          • JDBC
      • Sample applications
        • Java
          • Spring Boot
          • Spring Batch
          • Spring JDBC
          • Spring Data JPA
          • Hibernate
          • MyBatis
          • Connector/J
          • TestContainers
        • Python
          • mysqlclient
          • PyMySQL
          • MySQL-connector-python
        • C
          • MySQL Connector/C
        • Go
          • Go-SQL-Driver/MySQL
          • GORM
        • PHP
          • EXT
          • MySQLi
          • PDO
        • Rust
          • Connect to OceanBase Database by using Rust
          • Connect to OceanBase Database by using SeaORM
      • Plan database objects
        • Create a database
        • Create a table group
        • Create a table
        • Create an index
        • Create an external table
      • Write data
        • Insert data
        • Update data
        • Delete data
        • Replace data
        • Generate test data in batches
      • Read data
        • Single-table queries
        • Join tables
          • INNER JOIN queries
          • FULL JOIN queries
          • LEFT JOIN queries
          • RIGHT JOIN queries
          • Subqueries
          • Lateral derived table
        • Use operators and functions in queries
          • Use arithmetic operators in queries
          • Use numerical functions in queries
          • Use string concatenation operators in queries
          • Use string functions in queries
          • Use datetime functions in queries
          • Use type conversion functions in queries
          • Use aggregate functions in queries
          • Use NULL-related functions in queries
          • Use the CASE conditional operator in queries
          • Lock query results with SELECT FOR UPDATE
          • Use the SELECT ... LOCK IN SHARE MODE statement to lock query results
        • Use a DBLink in queries
        • Set operations
      • Transactions
        • Overview
        • Start a transaction
        • Savepoints
          • Mark a savepoint
          • Roll back a transaction to a savepoint
          • Release a savepoint
        • Commit a transaction
        • Roll back a transaction
      • Application errors
        • Troubleshooting guidelines
          • About error codes
          • Error handling specifications for MySQL-compatible applications
        • Common errors and troubleshooting practices
          • Disconnected from the server, with ERROR 2013 reported
          • Idle transaction timed out, with ERROR 6002 reported
          • Transaction timed out, with ERROR 4012 reported
          • User locked, with ERROR 3118 reported
          • Incorrect user password, with ERROR 1045 reported
          • Table already exists, with ERROR 1050 reported
          • Table does not exist, with ERROR 1146 reported
          • Duplicate data inserted, with ERROR 1062 reported
          • ERROR 1215 reported in foreign key addition
          • Data truncated while being inserted, with ERROR 1265 reported
    • Develop applications (Oracle mode)
      • Connect to OceanBase Database
        • Overview
        • Connect to an OceanBase tenant by using OBClient
        • Connect to OceanBase Database by using ODC
        • Use database connection pool
          • Database connection pool configuration
          • Tomcat
          • c3p0
          • Proxool
          • HikariCP
          • DBCP
          • Commons Pool
          • Druid
      • Sample applications
        • Java
          • OceanBase Connector/J
          • Spring Boot
          • Spring Batch
          • Spring Data JDBC
          • Spring Data JPA
          • Hibernate
          • MyBatis
          • JFinal
        • Python
          • Python Driver Oracle Mode
        • C/C++
          • OceanBase Connector/C
          • OceanBase Connector/ODBC
          • SqlSugar
      • Plan database objects
        • Create a table group
        • Create a table
        • Create an index
        • Create an external table
      • Write data
        • Insert data
        • Update data
        • Delete data
        • Replace data
        • Generate test data in batches
      • Read data
        • Single-table queries
        • Join tables
          • INNER JOIN queries
          • FULL JOIN queries
          • LEFT JOIN queries
          • RIGHT JOIN queries
          • Subqueries
          • Lateral derived tables
        • Use operators and functions in queries
          • Use arithmetic operators in queries
          • Use numerical functions in queries
          • Use string concatenation operators in queries
          • Use string functions in queries
          • Use datetime functions in queries
          • Use type conversion functions in queries
          • Use aggregate functions in queries
          • Use NULL-related functions in queries
          • Use CASE functions in queries
          • Use the SELECT...FOR UPDATE statement to lock query results
        • Use a DBLink in queries
        • Set operations
      • Transactions
        • Overview
        • Start a transaction
        • Savepoints
          • Mark a savepoint
          • Roll back a transaction to a savepoint
        • Commit a transaction
        • Roll back a transaction
      • Application errors
        • Troubleshooting guidelines
          • About error codes
          • Error handling specifications for Oracle-compatible applications
        • Common errors and troubleshooting practices
          • Idle transaction timed out, with Error OBE-24761 reported
          • Transaction timed out, with Error OBE-00600 reported
          • User locked, with ERROR 3118 reported
          • Incorrect user password, with ERROR 1045 reported
          • Table already exists, with Error OBE-00955 reported
          • Table does not exist, with Error OBE-04043 reported
          • Duplicate data inserted, with Error OBE-00001 reported
          • Error OBE-00600 reported in foreign key addition
          • Inconsistent data types, with Error OBE-00932 reported
  • Deploy
    • Overview
    • HA deployment solutions for OceanBase clusters
    • Deploy OceanBase Database Enterprise Edition
      • Deployment process
      • Before deployment
        • Prepare servers
        • Configure servers
        • Prepare installation packages
        • Deploy OAT
      • Deploy through GUI
        • Configure deployment environment using OAT
          • Add a server
        • Deploy OCP
          • Overview
          • Upload installation packages
          • Create MetaDB
          • Deploy OCP
        • Deploy OceanBase clusters using OCP
          • Deploy a standalone OceanBase database by using OCP
          • Deploy a two-replica OceanBase cluster with the arbitration service by using OCP
          • Deploy a single-replica OceanBase cluster by using OCP
          • Deploy a three-replica OceanBase cluster by using OCP
        • (Optional) Deploy ODP
      • Deploy through CLI
        • Configure deployment environment
          • Initialize an OBServer node by using oatcli
          • (Optional) Configure the clock source
        • Deploy OceanBase clusters using CLI
          • Deploy a standalone OceanBase database by using the CLI
          • Deploy a two-replica OceanBase cluster with the arbitration service by using the CLI
          • Deploy a single-replica OceanBase cluster by using the CLI
          • Deploy a three-replica OceanBase cluster by using the CLI
        • (Optional) Deploy ODP
      • Deploy the OceanBase Database Java SDK
    • Deploy OceanBase Database Community Edition
      • Overview
      • Deploy locally
        • Software and hardware requirements
        • Before deployment
          • (Optional) Check resources
          • (Optional) Set password-free SSH login
          • (Optional) Configure the clock source
          • (Optional) Perform disk planning
          • (Optional) Configure limits.conf
          • (Optional) Configure sysctl.conf
          • (Optional) Disable the firewall and SELinux
          • (Optional) Create a user
        • Deploy through GUI
          • Deploy an OceanBase cluster by using the obd GUI
          • Deploy an OceanBase cluster through the GUI of OCP
        • Deploy OceanBase Database in a production environment by using the CLI
        • Deploy OceanBase Database by using systemd
        • Deploy OceanBase Database in a container
      • Deploy an OceanBase cluster in a Kubernetes environment
      • Install OceanBase Desktop
    • Clear an OceanBase cluster
    • Recommended configurations
  • Migrate
    • Overview
    • Migrate from MySQL databases to OceanBase Database
      • Use OMS to migrate data from a MySQL database to a MySQL tenant of OceanBase Database
      • Use mydumper and myloader to migrate data from a MySQL database to OceanBase Database
      • Use DBCAT to migrate schemas from a MySQL database to OceanBase Database
      • Use DataX to migrate table data from a MySQL database to OceanBase Database
      • Use CloudCanal to migrate data from a MySQL database to OceanBase Database
      • Use Canal to synchronize data from a MySQL database to OceanBase Database
      • Use Flink CDC to synchronize data from a MySQL database to OceanBase Database
      • Use ChunJun to migrate data from a MySQL database to OceanBase Database
    • Migrate from OceanBase Database to MySQL databases
      • Use OMS to migrate data from a MySQL tenant of OceanBase Database to a MySQL database
      • Use OMS to migrate incremental data from an Oracle tenant of OceanBase Database to a MySQL database
      • Use DBCAT to migrate schemas from OceanBase Database to a MySQL database
      • Use DataX to migrate table data from OceanBase Database to a MySQL database
      • Use Canal to synchronize data from OceanBase Database to a MySQL database
      • Use CloudCanal to migrate data from OceanBase Database to a MySQL database
      • Use Flink CDC to migrate data from OceanBase Database to a MySQL database
      • Use ChunJun to migrate data from OceanBase Database to a MySQL database
    • Migrate from Oracle databases to OceanBase Database
      • Use OMS to migrate data from an Oracle database to a MySQL tenant of OceanBase Database
      • Use OMS to migrate data from an Oracle database to an Oracle tenant of OceanBase Database
      • Use DBCAT to migrate schemas from an Oracle database to OceanBase Database
      • Use DataX to migrate table data from an Oracle database to OceanBase Database
    • Migrate from OceanBase Database to Oracle databases
      • Use OMS to migrate data from an Oracle tenant of OceanBase Database to an Oracle database
      • Use DBCAT to migrate schemas from OceanBase Database to an Oracle database
      • Use DataX to migrate table data from OceanBase Database to an Oracle database
    • Migrate from DB2 databases to OceanBase Database
      • Use OMS to migrate data from a DB2 LUW database to a MySQL tenant of OceanBase Database
      • Use OMS to migrate data from a DB2 LUW database to an Oracle tenant of OceanBase Database
      • Use DBCAT to migrate table schemas from a DB2 LUW database to OceanBase Database
    • Migrate from OceanBase Database to DB2 databases
      • Use OMS to migrate data from a MySQL tenant of OceanBase Database to a DB2 LUW database
      • Use OMS to migrate data from an Oracle tenant of OceanBase Database to a DB2 LUW database
    • Migrate from TiDB databases to OceanBase Database
      • Use OMS to migrate data from a TiDB database to a MySQL tenant of OceanBase Database
    • Migrate from PostgreSQL databases to OceanBase Database
      • Use OMS to migrate data from a PostgreSQL database to a MySQL tenant of OceanBase Database
    • Migrate from CSV files to OceanBase Database
      • Use DataX to migrate CSV files to OceanBase Database
      • Import data by using the LOAD DATA statement
    • Import data from SQL files to OceanBase Database
    • Migrate data between OceanBase Database
      • Use OMS to migrate data from an OceanBase tenant to another of the same type
      • Use OMS to migrate data from an OceanBase tenant to another of the same type in active-active disaster recovery scenarios
      • Use obloader & obdumper to migrate data between MySQL tenants in OceanBase Database
      • Use obloader & obdumper to migrate data from a MySQL tenant to an Oracle tenant in OceanBase Database
      • Use obloader & obdumper to migrate data between Oracle tenants in OceanBase Database
      • Use obloader & obdumper to migrate data from an Oracle tenant to a MySQL tenant in OceanBase Database
    • Migrate data using SQL statements
      • Migrate data between tables
      • Migrate resource units
      • Export data using the OUTFILE statement
    • Overview of direct load
  • Manage
    • Log in to an OceanBase tenant
    • Manage clusters
      • Overview
      • Cluster parameters
      • Common cluster operations
        • View a zone
        • View a node
        • Restart a node
        • Add a node
        • Delete a node
        • Isolate a node
        • Replace a node
        • Start a zone
        • Add a zone
        • Delete a zone
        • Modify a zone
        • Isolate a zone
        • View cluster parameters
        • Modify cluster parameters
        • Reset cluster parameters
        • Online upgrade from standalone deployment to distributed deployment
        • Upgrade a cluster
          • OceanBase Database Enterprise Edition
            • Overview
            • Upgrade an arbitration service
            • Upgrade an OceanBase cluster
            • Check upgrade results
          • OceanBase Database Community Edition
            • Upgrade OceanBase Database by using obd
      • Troubleshoot common problems
        • Failures of a minority of nodes
        • Failures of the majority of nodes
    • Manage tenants
      • Tenant introduction
      • Tenant capacity
      • Tenant types
      • User tenant introduction
      • Tenant system variables
      • Common tenant operations
        • Create a tenant
        • Resource isolation
          • Overview
          • Manage resource isolation (Oracle mode)
            • Configure cgroups
            • Configure global CPU resource isolation for frontend and backend tasks
            • Calibrate the disk performance
            • Configure resource isolation within a tenant
            • Update a plan directive
            • Delete a plan directive
            • Delete a resource management plan
            • Delete a resource group
            • Clear cgroup configurations
          • Manage resource isolation (MySQL mode)
            • Configure cgroups
            • Configure global CPU resource isolation for foreground and background tasks
            • Calibrate the disk performance
            • Configure resource isolation within a tenant
            • Update resource management plan directive
            • Delete a plan directive
            • Delete a resource management plan
            • Delete a resource group
            • Clear cgroup configurations
        • View tenant and resource information
        • View and set the tenant allowlist
        • View system variables of a tenant
        • Modify system variables of a tenant
        • Scale in/out
          • Introduction to scaling in/out
          • Plan resources
          • Modify the unit config for a tenant
          • Modify the number of resource units for a tenant
          • Modify the number of primary zones for a tenant
        • Modify attributes of a resource pool
        • Modify attributes of a tenant
        • Lock and unlock a tenant
        • Clone a tenant
        • Cancel tenant cloning
        • Drop a tenant
        • Restore a tenant
        • Rename a tenant
        • Manage resource pools
          • View resource pool information
          • Allocate a resource pool to a tenant
          • Remove resource pools from a tenant
          • Merge and split a resource pool
          • Drop a resource pool
        • Manage unit configs
          • Query unit configs
          • Modify a unit config
          • Drop a unit config
        • Manage services
          • Create a service
          • Query the service status
          • Start a service
          • Stop a service
          • Delete a service
    • Manage replicas
      • Overview
      • Use columnstore replicas
      • Replica distribution
        • Locality
        • Common locality operations
          • View locality
          • Modify locality
          • Add replicas
          • Remove replicas
          • Convert the type of a replica
          • Adjust the distribution of replicas
          • View the locality change history
          • Migrate replicas
          • Modify the number of Paxos replicas of a log stream
          • Cancel a replica task
      • Traffic distribution
      • Data distribution
      • Data load balancing
        • Overview
        • Transfer a partition
        • Cancel a partition transfer task
        • Cancel a load balancing job
    • High availability
      • High availability overview
      • Multi-replica disaster recovery
        • Data link introduction
        • ODP high availability
        • Database-level high availability
        • Disaster recovery architecture and levels
      • Physical standby database disaster recovery
        • Overview
        • Limitations
        • Create a standby tenant
          • Preparations
          • Create an empty standby tenant
          • Create a standby tenant by using the backup and restore (with complete logs) feature
          • Create a standby tenant by using the BACKUP DATABASE PLUS ARCHIVELOG feature
        • Log transmission service
          • Overview
          • Configure log transmission service
            • Set a log restore source
            • Specify a log restore endpoint
          • View log restore source information
          • View the log synchronization progress
          • Pause or resume log synchronization
          • Optimize the log synchronization performance
          • Set the log synchronization bandwidth limit
          • Specify log compression
        • Log storage service
        • Switch roles
          • Overview of tenant roles
          • Switchover
          • Failover
        • Drop primary and standby tenants
      • Arbitration high availability
        • Arbitration service overview
        • Enable the arbitration service for a tenant
        • Disable the arbitration service for a tenant
        • Modify the log stream downgrade control time
        • Query log stream upgrade/downgrade information
        • Replace the arbitration service for a cluster
        • Remove the arbitration service for a cluster
        • Clear residual cluster information
      • Manage recycle bin
        • Overview
        • Enable or disable the recycle bin
        • View objects in the recycle bin
        • Restore objects from the recycle bin
        • Purge the recycle bin
      • Flashback queries
    • Security and permissions
      • Overview
      • Identification and authentication
        • MySQL mode
          • Identity authentication
          • Password complexity
          • Login failure processing
        • Oracle mode
          • Identity authentication
          • Password complexity
          • Login failure processing
      • Access control
        • Overview
        • Users and permissions
          • Overview
          • MySQL mode
            • Privilege types in MySQL-compatible mode
            • Create a user
            • Grant direct privileges
            • Privilege delegation
            • Role management
              • Overview
              • Create a role
              • Grant privileges to a role
              • Grant a role to a user or another role
              • Activate a role
              • View roles
              • Revoke privileges from a role
              • Revoke a role from a user or another role
              • Drop a role
            • Grant indirect privileges
            • View user privileges
            • Revoke privileges
            • Lock or unlock a user
            • Drop a user
          • Oracle mode
            • Privilege types in Oracle mode
            • Create a user
            • View the information of a user
            • Grant direct privileges
            • Privilege delegation
            • Manage roles
              • Overview
              • Create a role
              • Grant a role to another role
              • Grant a role to a user
              • Activate or deactivate roles for a user
              • View roles
              • Modify a role
              • Revoke a role
              • Drop a role
            • Grant indirect privileges
            • View user privileges
            • Revoke privileges
            • Use a proxy user
            • Lock or unlock a user
            • Drop a user
        • Network security access control
        • RPC connection authentication
        • Row-level access control
      • Data transmission encryption
        • Overview
        • OBServer transmission encryption
        • ODP transmission encryption
      • Transparent data encryption
        • Overview
        • MySQL mode
          • Enable TDE for new tables
          • Enable TDE for existing tables
          • Decrypt a table
        • Oracle mode
          • Enable TDE for new tables
          • Enable TDE for existing tables
          • Decrypt a table
      • Column encryption
        • Overview of column encryption
        • Create column encryption rules
        • Manage column encryption privileges
        • Column encryption FAQ
      • Security auditing
        • Security auditing overview
        • MySQL-compatible mode
          • Enable security auditing
          • Set an auditing rule
          • View auditing records
          • Disable security auditing
        • Oracle-compatible mode
          • Enable security auditing
          • Set and view auditing rules
          • View auditing records
          • Audit user logins
          • Audit user operations
          • Audit specified database objects
    • Backup and restore
      • Physical backup and restore
      • Experience physical backup and restore with simplified deployment
      • Deploy NFS
      • Log archive
        • Overview
        • Prepare for log archiving
        • Enable ARCHIVELOG
        • Suspend archiving
        • Disable ARCHIVELOG
        • View information about pieces
        • View the archiving progress
        • View the archiving history
        • View archiving parameter settings
        • Change the log archive destination
        • Clear the archive path setting
        • Views related to log archiving
      • Data backup
        • Prepare for backup
        • Initiate a full data backup job
        • Initiate an incremental data backup job
        • Back up parameters
        • Stop a backup job
        • View the data backup progress
        • View the data backup history
        • View parameters related to data backup
        • Change the backup destination
        • Views related to data backup
      • Update `access_id` and `access_key` information for the backup or archive path
      • Clear backup data
        • Automatic cleanup of expired backups
        • Stop backup cleanup
        • Query the backup cleanup progress
        • Query the backup cleanup history
        • Backup cleanup parameter
        • Views related to backup cleanup
      • Restore data
        • Preparations
        • Perform physical restore
        • Perform restore from the specified paths
        • Cancel physical restore
        • View the physical restore progress
        • View physical restore results
        • Replay logs to a standby tenant
        • Convert a standby tenant into primary tenant
        • Upgrade a tenant after restore
        • Parameters related to physical restore
        • Views related to physical restore
      • Restore by table
        • Overview of table-level restore
        • Preparations
        • Restore by table
        • Schema recovery during table-level recovery
        • Cancel table restore
        • View the table restore progress
        • View the table restore result
        • Parameters related to table restore
        • Views related to table restore
      • Backup and restore performance tuning
    • Monitor
      • Overview
      • Metrics
        • System monitoring
          • Overview
          • Metrics
          • Wait events
          • Latch events
        • SQL monitoring
          • Overview
          • SQL audit
          • Execution plans
      • Cases
    • Logs
      • Overview
      • Log levels
      • Log stability
      • Log control
      • Log compression and decompression
      • Log metrics
      • Alert logs
      • View logs
        • Search for the logs of a specific SQL request
        • Query the log of a previous SQL request by using the SQL Trace feature
    • Daily inspection
      • Overview
      • Check cluster parameters
      • Check the host status
      • Check tenant resource usage
      • Check cluster resource usage
      • Check the OBServer node status
      • Check the NTP offset
      • Deadlock detection
      • End-to-end tracing
        • Overview
        • Process
        • Methods
        • Show end-to-end tracing information
        • Quick start: End-to-end diagnosis with obdiag
    • Performance tuning
      • Overview
      • Identify bottlenecks on the data link
      • Identify bottlenecks within components
        • ODP performance bottlenecks
        • ODP performance analysis
        • OBServer performance bottlenecks
          • Overview
          • Non-optimal plan
            • Non-optimal plan
            • Buffer tables
            • Cardinality
          • Hard parsing
          • Capacity issues
          • Internal wait events
      • SQL tuning
        • SQL tuning system
        • Execution plan optimization
          • Statistical information and row estimation
            • Overview
            • Statistical information
              • Overview
              • Collect statistical information
                • Overview
                • Manually collect statistics
                • Automatic statistics collection
              • Query statistics
              • Manage statistical information
                • Overview
                • Delete and set statistics
                • Import and export statistics
                • Lock statistics
                • Query historical versions of statistics and roll back to a specified version
                • Configure statistics collection strategies
            • Row estimation
              • Overview
              • Row estimation based on the selectivity
              • Row estimation based on the storage layer
            • Use statistical information and row estimation
          • Plan management
            • Plan cache
            • Disadvantages of the plan cache and countermeasures
            • Views related to the plan cache
          • Index selection
            • Overview
            • Reduce row reads
            • Avoid table access by index primary key
            • Avoid sorting
          • Join
            • Joins
            • Join algorithm
              • Nested loop joins
              • Hash Join
              • Merge join
              • Common business issues
            • Join types
            • Join order
          • Order and limit optimization
            • Overview
            • SORT assignment and optimization
            • Optimization in ORDER BY + LIMIT scenarios
        • Business logic optimization
          • SQL specifications
          • Schema specifications
        • Locate and analyze slow queries I
        • Locate and analyze slow queries II
        • Typical scenarios and cases
    • Troubleshooting
      • Overview
      • Bootstrap
      • Storage
        • Minor compaction and major compaction
        • Memory-related errors
        • Migration, replication, and rebuild tasks
      • Election
        • Election
        • Leader switchover exceptions
        • Absence of the leader
      • Transaction
        • Transaction-related errors
        • Transaction rollbacks
        • Long-running transactions
        • Suspended transactions
        • Idle transactions
      • Log synchronization-related errors
      • Physical standby database
        • Log synchronization stuck for the physical standby database
        • Switchover and failover issues
        • Other issues
      • Backup and restore
        • Data backup failures
        • Physical restore failures
      • Arbitration server process startup failures
      • Troubleshoot SQL execution errors
      • Application exceptions -- error messages without OceanBase error codes
      • Application exceptions -- error messages with OceanBase error codes
      • Troubleshoot application disconnection issues
    • Emergency response
      • Emergency response overview
      • Analysis, diagnosis, and decision-making procedure
      • Common emergency problem handling
        • Hardware issues
          • Node failure
          • Network failure
          • ODP failure
          • Other hardware and network issues
        • Capacity issues
          • Exceptions of SQL queries
          • Node disk I/O high
          • Node network card overload
          • Tenant memory full
          • obproxy thread exhaustion
          • Node clog disk full
          • Node data disk full
          • Tenant request queue backlog
        • Other cluster issues
          • sys tenant or RootService exceptions
          • Insufficiency or leakage of system memory
  • OceanBase AP
    • Release note for AP core features
    • Overview of OceanBase AP
    • Core features
    • Quickly try out OceanBase AP
    • Deployment
      • Overview
      • Recommended parameter configurations in AP scenarios
    • Data table design
      • Table overview
      • Best practices for data table design
        • Unit 1: Best practices for optimizing storage structures and query performance
        • Unit 2: Best practices for creating special indexes
    • Import data
      • Overview
      • Direct load
        • Overview of direct load
        • Full direct load
        • Incremental direct load
        • Import data in direct load mode by using obloader
      • Import data to an external table
      • Strategies and best practices
    • Export data
    • Query acceleration
      • Statistics
      • Accelerate queries by using materialized views
      • Select a query parallelism level
    • OceanBase data processing
    • Data visualization
    • Performance diagnosis and tuning
      • Use the DBMS_XPLAN package for performance diagnostics
      • Use the GV$SQL_PLAN_MONITOR view for performance analysis
      • Views related to AP performance analysis
    • Performance testing
    • Ecosystem integration in AP scenarios
    • Recommended practical tutorials for analytical processing
    • AP FAQ
  • Vector Search
    • Overview
      • Overview of vector search
      • Core features of vector search
      • AI application workflow with OceanBase vector search
    • Quick starts
      • Perform vector search by using SQL
      • Perform a vector search by using Python
    • Vector embedding
    • Store vector data
    • Vector index
      • Overview of vector indexes
      • Vector index memory management
      • Dense index
        • Overview of dense indexes
        • Choose an index type
        • HNSW series indexes
        • IVF series indexes
      • Maintain indexes
      • Optimize index performance
    • Use SQL functions
    • Text embedding for vector search
    • Vector similarity search
    • Migrate to OceanBase Database from a vector database
    • Tutorials
      • Overview
      • Build an image search application with OceanBase Database
      • Build an intelligent Q&A assistant with OceanBase Database
    • AI integrations
      • Overview of AI integration
    • Benchmark testing with VectorDBBench
    • References
      • Overview of vector data types
      • Compatibility
      • Supported clients and languages
        • Supported clients and languages for vector search
        • pyobvector Python SDK API reference
        • Java SDK interface
    • Vector search FAQs
  • Shared storage
    • Shared storage architecture
  • Integrations
    • Overview of the ecosystem
    • ORM frameworks
      • Java
        • Spring Boot
        • Spring Batch
        • Spring JDBC
        • Spring Data JPA
        • Hibernate
        • MyBatis
      • Python
        • SQLAlchemy
        • peewee
        • Tortoise ORM
      • Go
        • GORM
        • beego ORM
      • Rust
        • SeaORM
        • Diesel
      • Ruby
        • Active Record
        • Sequel
        • Ruby on Rails
      • Node.js
        • Sequelize
        • TypeORM
        • Prisma
        • Drizzle
      • C#
        • Dapper
        • SqlSugar
        • FreeSQL
      • PHP
        • Yii 2.0 ORM
        • Laravel Eloquent ORM
        • CakePHP
    • Database version management
      • Liquibase
      • Flyway
    • Data integration
      • Flink
        • Apache Flink
        • Flink DirectLoad
        • Flink Connector OceanBase
      • dbt
      • SeaTunnel
      • Dataphin
      • Maxwell
      • Debezium
      • Spark Catalog
      • NiFi
      • Qlik Replicate
      • RisingWave CDC
    • SQL development
      • WebLogic
      • DBeaver
      • Navicat
      • DataGrip
      • TablePlus
      • DMS
    • Orchestration and scheduling
      • Airflow
      • PowerJob
      • DolphinScheduler
      • Linkis
    • Visualization tools
      • Superset
      • Excel
      • Power BI
      • Quick BI
      • Tableau
      • GuanData
      • vividime
    • Database management
      • NineData
      • Bytebase
      • DataHub
      • Zabbix
    • AI
      • OpenAI
      • Qwen
      • LangChain
      • LlamaIndex
      • Dify
      • n8n
      • Trae
      • SpringAI
      • Cline
      • Cursor
      • Continue
      • MCP Toolbox
      • CamelAI
      • Firecrawl
      • Hugging Face
      • Ollama
      • Google Gemini
      • Cloudflare Workers AI
      • DB GPT
      • Jina AI
      • Augment Code
      • Claude Code
      • Kiro
  • Tutorials
    • Build an image search application with OceanBase Database
    • Build an intelligent Q&A chatbot with OceanBase
    • Build a cultural tourism assistant with OceanBase multi-model integration
    • Build a real-time data warehouse and visual dashboard with OceanBase
    • Analyze data in OceanBase Database using Superset
    • Build a WordPress website with OceanBase Database
    • Use direct load to accelerate massive data import
  • Reference
    • OceanBase concepts
      • OceanBase Database architecture
      • Development of OceanBase Database
      • Multi-tenant architecture
        • Overview
        • Compatibility modes
        • Tenants
        • Tenants and resource management
          • Tenant resource management
          • Multi-tenant resource isolation
          • Resource unit balancing
      • Database objects
        • Oracle mode
          • Introduction
            • Overview
            • Database object types
            • Database object storage
            • Dependencies between database objects
          • Tables
            • Overview
            • Data type
              • Overview
              • Character data types
              • Numeric data types
              • Datetime data types
              • ROWID data types
              • LOB data types
              • Format model
                • Overview
                • Number format models
                • Datetime format models
              • Multi-model data types
            • Integrity constraints
            • Table storage
            • Table compression
            • Partitioned table
            • Replicated table
            • Tables with and without a primary key
            • Temporary tables
            • Table groups
          • Indexes
            • Overview of indexes
            • Local and global indexes
            • Unique and non-unique indexes
            • Use indexes
            • Index storage
          • Partitions
            • Overview
            • Partitioning keys
            • Partitioning types
            • Partitioned indexes
            • External table partitions
          • Views
            • Views in a database
            • Standard views
              • Standard views
              • Overview
              • OceanBase-specific views
              • Oracle-compatible views
              • View operations and data access
            • Materialized views
              • Materialized views
              • Materialized view logs
              • Creation and update strategies for materialized views
          • Other objects
            • Sequences
            • Synonyms
          • System views
            • Dictionary views
            • Performance views
          • Data integrity
            • Overview
            • Integrity constraint type
              • Overview
              • NOT NULL constraints
              • UNIQUE KEY constraints
              • PRIMARY KEY constraints
              • FOREIGN KEY constraints
              • CHECK constraints
            • Use of integrity constraints
        • MySQL mode
          • Introduction
            • Overview
            • Database object types
            • Database object storage
            • Dependencies between database objects
          • Tables
            • Overview
            • Data type
              • Overview
              • Numeric data types
              • Datetime data types
              • Character data types
              • LOB data types
              • Multi-model data types
              • Spatial data types
              • JSON data types
            • Integrity constraints
            • Table storage
            • Table compression
            • Partitioned table
            • Replicated table
            • Tables with and without a primary key
            • Temporary tables
            • Table groups
          • Indexes
            • Overview of indexes
            • Local and global indexes
            • Unique and non-unique indexes
            • Spatial indexes
            • Full-text index
            • Use indexes
            • Index storage
          • Partitions
            • Overview
            • Partitioning keys
            • Partitioning types
            • Partitioned indexes
            • External table partitions
          • Views
            • Views in a database
            • Standard views
              • Overview
              • Overview
              • OceanBase-specific views
              • MySQL-compatible views
              • Oracle-compatible views in MySQL tenants
              • Oracle-compatible views in the sys tenant
              • View operations and data access
            • Materialized views
              • Materialized views
              • Materialized view logs
              • Creation and update strategies for materialized views
          • System views
            • Dictionary views
            • Performance views
          • Data integrity
            • Overview
            • Integrity constraint type
              • Overview
              • NOT NULL constraints
              • UNIQUE KEY constraints
              • PRIMARY KEY constraints
              • Foreign key constraints
            • Use of integrity constraints
      • Distributed database objects
        • Overview
        • Cluster architecture
        • Data partitions and replicas
          • Overview
          • Log streams
          • Partition replica type
            • Overview
            • Full-featured replica
            • Read-only replicas
            • Columnstore replica
          • Multi-replica consensus protocols
          • Data balancing
            • Intra-tenant balancing
            • Views and parameters related to data balancing
        • Dynamic scaling
          • Cluster scaling
          • Tenant resource scaling
            • Overview
            • Horizontal scaling of tenant resources
            • Vertical scaling of tenant resources
            • Cross-zone management of tenant resources
      • Data link
        • Overview
        • Database proxy
          • Overview
          • SQL routing
          • Connection management
          • ODP configuration management
          • Logs and monitoring
        • Database connector
          • Overview
          • OBCI
          • OceanBase Connector/J
          • OceanBase Connector/C
        • Cross-data source access through DBLink
          • DBLink in MySQL mode
          • DBLink in Oracle mode
      • User interface and query language
        • SQL
          • Introduction
            • Overview
            • SQL data access
            • SQL standards
          • SQL statements
            • Overview
            • DDL statements
            • Monitor DDL execution progress
            • DML statements
            • DCL
          • Execution process of SQL queries
          • Query SQL execution plans
          • Distributed execution plan
            • Perform distributed execution and parallel queries
            • Generate distributed execution plans
            • Run and disable a parallel query
            • Manage distributed execution plans
            • Perform parameter tuning for PX
        • PL
          • PL concepts
            • Oracle mode
              • Subprograms
              • Stored procedures
              • Functions
              • Triggers
              • Packages
            • MySQL mode
              • Subprograms
              • Stored procedures
              • Functions
              • Triggers
          • PL subprogram execution mechanism
        • Client programming languages
      • Transaction management
        • Transaction
          • Overview
          • Transaction structure
          • Statement-level atomicity
          • GTS
          • Transaction control
            • Overview
            • Active transactions
            • Savepoint
            • Transaction control statements
              • MySQL transaction control
              • Oracle transaction control
          • Redo logs
          • Local transactions
          • Distributed transaction
            • Overview
            • Two-phase commit
          • XA transactions
        • Transaction concurrency and consistency
          • Overview
          • Multi-version read consistency
          • Concurrency control
            • Overview
            • Lock mechanism
          • Transaction isolation level
            • Overview
            • Transaction isolation levels in Oracle mode
            • Transaction isolation levels in MySQL mode
          • Weak-consistency read
      • Storage architecture
        • Overview
        • Data storage
          • Data storage overview
          • MemTables
          • SSTables
          • Columnar storage
          • Compression and encoding
        • Compaction
          • Overview
          • Compaction
          • Major compaction
        • Multi-level caching in shared-nothing architecture
        • Multi-level caching in shared storage
        • Query processing
        • Data integrity
          • Detect silent data corruption
      • Data reliability and high availability
        • High availability architecture
          • Overview
          • ODP high availability
          • Leader election in distributed systems
          • Multi-replica log synchronization
          • Paxos protocol
          • Automatic handling of node failures
        • Deployment solutions for disaster recovery
        • Data protection
          • Overview
          • Flashback queries
          • Recycle bin
        • Backup and restore
          • Overview
          • Backup directory structure
          • Backup architecture
          • Restore process
        • Arbitration-based high availability solution
        • Physical Standby Database solution
      • Database security
        • Overview
        • Authentication
        • Access control
        • Data transmission encryption
        • Data storage encryption
        • Monitoring and alerting
        • Security audit
      • OBServer node architecture
        • Structure of the OBServer node installation directory
        • Configuration file
        • observer thread model
          • Threads
          • Worker threads
          • Background threads
        • Logs
        • Memory management
          • Overview
          • Memory-related parameters
          • Memory-related views
          • Memory usage logs
          • Diagnose memory errors
      • OceanBase plugin mechanism
    • System management
      • Configuration management
        • Overview
        • Set parameters
        • Set variables
      • Storage management
        • Minor compaction management
          • Overview
          • Automatically trigger a minor compaction
          • Manually initiate a minor compaction
          • View minor compaction information
          • Modify minor compaction parameters
        • Major compaction management
          • Overview
          • Automatically trigger a major compaction
          • Configure scheduled major compactions
          • Adaptive major compactions
          • Manually initiate a major compaction
          • Manually control a major compaction
          • View major compaction information
          • Modify major compaction settings
        • Data compression
          • Overview
          • Data encoding and compression
      • Memory management
        • Overview
        • Memory structure
        • Set the maximum memory for an OceanBase database
        • Manage internal system memory
        • Memory management in a tenant
        • Manage the memory of the plan cache
        • Memleak-based regular memory leak diagnostics mechanism
        • Query memory usage information
        • FAQ about memory
      • Process management
        • Overview
        • Multi-tenant threads of OceanBase Database
        • View the thread status
        • Background threads of OceanBase Database
        • FAQ about multi-tenant threads
      • Disk management
        • Configure automatic scale-out of disk space for data files
        • View the disk space used by a tenant or table
    • Database object management
      • Overview
      • MySQL mode
        • Create and manage databases
          • Create a database
          • View databases
          • Modify a database
          • Drop a database
        • Create and manage tables
          • Overview
          • Create a table
          • Column skip index attribute
          • Define an auto-increment column
          • Define column constraints
          • Query tables
          • Modify a table
          • Change the attribute of a table
          • Empty a table
          • Drop a table
          • Lock a table
          • Create and manage external tables
            • External tables
            • Create an external table
            • Add partitions for an external table
            • Manage external files
            • Data type mapping
        • Create and manage partitions
          • Overview
          • Create a partitioned table
          • Partition splitting
            • Overview
            • Manual partition splitting
            • Automatic partition splitting
          • Dynamic partitioning
            • Overview of dynamic partitioning
            • Create a dynamic partitioned table
            • Query a dynamic partitioned table
            • Modify a dynamic partitioned table
            • Dynamic partition management tasks
          • Modify partitioning rules
          • Add a partition
          • Drop a partition
          • Truncate a partition
          • Partition pruning
          • Query data in specified partitions
          • Create indexes on partitioned tables
            • Overview
            • Local indexes
            • Global indexes
          • Partition exchange
        • Create and manage table groups
          • Overview
          • Create a table group
          • Query information about a table group
          • Add tables to a table group
          • Modify the SHARDING attribute of a table group
          • Manage tables in a table group
          • Drop a table group
        • Create and manage indexes
          • Overview
          • Create an index
          • Query indexes
          • Monitor indexes
          • Drop an index
          • System functions supported for function-based indexes
          • System functions not supported for function-based indexes
        • Manage views
          • Manage standard views
          • Manage materialized views
            • Overview of materialized views
            • Materialized view log
            • Automatic management of materialized view logs
            • Create a materialized view
            • Refresh materialized views
            • Rewrite queries based on materialized views
            • Query materialized views
            • Modify the attributes of a materialized view
            • Drop a materialized view
        • Create and manage sequences
          • Create a sequence
          • Query sequences
          • Reference a sequence
          • Modify a sequence
          • Drop a sequence
        • Create and manage triggers
          • Overview
          • Create a DML trigger
          • Query trigger information
          • Drop a trigger
        • Create and manage DBLinks
          • Create a DBLink
          • Query existing DBLinks
          • Manage DBLinks
          • Use a DBLink to access data in a remote database
          • Drop a DBLink
        • Create and manage catalogs
          • Catalog overview
          • Create a catalog
          • View a catalog
          • Delete a catalog
      • Oracle mode
        • Create and manage tables
          • Overview
          • Create a table
          • Column skip index attribute
          • Define column constraints
          • Query the definition of a table
          • Modify a table
          • Change the attribute of a table
          • Empty a table
          • Drop a table
          • Lock a table
          • Create and manage external tables
            • Overview
            • Create an external table
            • Add partitions for an external table
            • Manage external files
            • Data type mapping
        • Create and manage partitions
          • Overview
          • Create a partitioned table
          • Partition splitting
            • Overview
            • Manual partition splitting
            • Automatic subpartition splitting
          • Dynamic partitioning
            • Overview of dynamic partitioning
            • Create a dynamic partitioned table
            • Query a dynamic partitioned table
            • Modify a dynamic partitioned table
            • Dynamic partition management tasks
          • Modify partitioning rules
          • Rename a partition
          • Add a partition
          • Drop a partition
          • Truncate a partition
          • Partition pruning
          • Query data in specified partitions
          • Create indexes on partitioned tables
            • Overview
            • Local indexes
            • Global indexes
          • Partition exchange
        • Create and manage table groups
          • Overview
          • Create a table group
          • Query information about a table group
          • Add tables to a table group
          • Modify the SHARDING attribute of a table group
          • Manage tables in a table group
          • Drop a table group
        • Create and manage indexes
          • Overview
          • Create an index
          • Query indexes
          • Monitor indexes
          • Drop an index
          • System functions supported for function-based indexes
          • System functions not supported for function-based indexes
        • Manage views
          • Manage standard views
          • Manage materialized views
            • Overview of materialized views
            • Materialized view logs
            • Automatic management of materialized view logs
            • Create a materialized view
            • Refresh a materialized view
            • Rewrite queries based on materialized views
            • Query materialized views
            • Modify the attributes of a materialized view
            • Drop a materialized view
        • Manage sequences
        • Manage synonyms
        • Create and manage triggers
          • Overview
          • Create a DML trigger
          • Create an INSTEAD OF trigger
          • Create a composite trigger
          • Modify and drop a trigger
          • Disable or enable a trigger
          • Query trigger information
        • Manage directory objects
        • Create and manage DBLinks
          • Create a DBLink
          • Query existing DBLinks
          • Manage DBLinks
          • Use a DBLink to access data in a remote database
          • Use a DBLink to modify the data in a remote database
          • Drop a DBLink
          • Install and configure OCI
    • Database design specifications and practices
      • Object naming conventions
        • Overview
        • Tenant naming conventions
        • User naming conventions
        • Table naming conventions
        • Field naming conventions
        • Other naming conventions
      • Object structure design specifications
        • Field design
        • Table structure design
        • Partitioned table design
        • Index design
        • Other structural designs
      • Character set specifications
      • Database connection specifications
      • Comments
      • ORM conventions
      • Exception handling
    • SQL reference
      • Introduction to SQL
      • SQL syntax
        • System tenants
          • Overview
          • ALTER SYSTEM
            • ACTIVATE STANDBY
            • ADD REPLICA
            • ADD RESTORE SOURCE
            • SET LOG_ARCHIVE_DEST
            • SET LOG_ARCHIVE_DEST_STATE
            • ARCHIVELOG
            • NOARCHIVELOG
            • ARBITRATION
            • BOOTSTRAP
            • BACKUP KEY
            • BACKUP
            • BACKUP CLUSTER PARAMETERS
            • BALANCE TASK
            • CANCEL BACKUP
            • CANCEL BALANCE JOB
            • CANCEL CLONE
            • CANCEL DELETE BACKUP
            • CANCEL MIGRATE UNIT
            • CANCEL REPLICA TASK
            • CANCEL RESTORE
            • CANCEL RECOVER TABLE
            • CANCEL TRANSFER PARTITION
            • CLEAR RESTORE SOURCE
            • MAJOR and MINOR
            • MIGRATE REPLICA
            • MIGRATE UNIT
            • MODIFY PAXOS_REPLICA_NUM
            • MODIFY REPLICA
            • MODULE DATA
            • DELETE BACKUP POLICY
            • FLUSH PLAN CACHE
            • JOB
            • SET LOG_RESTORE_SOURCE
            • PARAMETER
            • RECOVER STANDBY
            • RECOVER STANDBY CANCEL
            • REMOVE REPLICA
            • REFRESH
            • RESTORE
            • RESTORE PREVIEW
            • RECOVER TABLE
            • SET DATA_BACKUP_DEST
            • SERVER
            • SERVICE_NAME
            • SWITCHOVER
            • THROTTLE
            • TRANSFER PARTITION
            • WASH MEMORY FRAGMENTATION
            • ZONE
          • ALTER RESOURCE POOL
          • ALTER RESOURCE TENANT
          • ALTER RESOURCE UNIT
          • ALTER TENANT
          • CREATE RESOURCE POOL
          • CREATE RESOURCE UNIT
          • CREATE TENANT
          • CREATE STANDBY TENANT
          • DROP RESOURCE POOL
          • DROP RESOURCE UNIT
          • DROP TENANT
          • SET DECRYPTION
          • SET ENCRYPTION
          • SHOW RESTORE PREVIEW
        • User tenants (MySQL mode)
          • Basic elements
            • Data types
              • Overview
              • Numeric types
                • Overview
                • Integer data types
                • Fixed-point data types
                • Floating-point data types
                • Bit value data type
              • Datetime types
                • Overview
                • DATE, DATETIME, and TIMESTAMP types
                • TIME type
                • YEAR type
              • String types
                • Overview
                • CHAR and VARCHAR
                • BINARY and VARBINARY
              • Large objects and text types
                • Overview
                • BLOB types
                • TEXT types
                • STRING types
                • LOB types
              • ENUM type
              • SET type
              • JSON data types
                • Overview
                • Create a JSON value
                • Query and modify JSON values
                • Convert a JSON data type
                • Update partial JSON data
              • Spatial data types
                • Overview
                • SRS
                • Create a spatial column
                • Create a spatial index
                • Spatial data formats
              • Roaring bitmap types
                • Overview
                • Create a highly compressed bitmap column
              • Array data types
                • Overview of array element types
                • Create an array column
              • Map data types
                • Overview of the map data type
                • ## Create map columns
            • Expressions
              • Overview
              • Expression syntax
              • Data type conversion rules
            • Character set and collation
              • Overview
              • CHARACTER SET
              • Collations
              • Database-level character set and collation
              • Table-level character set and collation
              • Column-level character sets and collations
              • Character sets and collations for character expressions
              • Character sets and collations for client connection
            • Literals
              • Overview
              • Strings
              • Numbers
              • Datetime values
              • Bit values
              • Boolean values
              • NULLs
            • Schema object names
            • User-defined variables
            • Comments
          • Operators
            • Overview of operators
            • Operator precedence
            • Arithmetic operators
            • Bitwise operators
            • Comparison operators
            • Logical operators
            • Assignment operators
            • Date and time operators
            • Concatenation operators
            • BINARY operator
            • CASE conditional operator
          • Functions
            • Overview
            • Single-row functions
              • Datetime functions
                • ADDDATE
                • CONVERT_TZ
                • CURDATE
                • CURRENT_DATE
                • CURRENT_TIME
                • CURRENT_TIMESTAMP
                • CURTIME
                • DATE
                • DATE_ADD
                • DATE_FORMAT
                • DATE_SUB
                • DATEDIFF
                • DAYOFMONTH
                • DAYOFWEEK
                • DAYOFYEAR
                • EXTRACT
                • FROM_DAYS
                • FROM_UNIXTIME
                • GET_FORMAT
                • HOUR
                • LAST_DAY
                • LOCALTIME
                • LOCALTIMESTAMP
                • MAKEDATE
                • MAKETIME
                • MICROSECOND
                • MINUTE
                • MONTH
                • MONTHNAME
                • NOW
                • PERIOD_ADD
                • PERIOD_DIFF
                • QUARTER
                • SEC_TO_TIME
                • SECOND
                • STR_TO_DATE
                • SUBDATE
                • SUBTIME
                • SYSDATE
                • TIME
                • TIME_FORMAT
                • TIME_TO_SEC
                • TIME_TO_USEC
                • TIMEDIFF
                • TIMESTAMP
                • TIMESTAMPADD
                • TIMESTAMPDIFF
                • TO_DAYS
                • TO_SECONDS
                • UNIX_TIMESTAMP
                • USEC_TO_TIME
                • UTC_DATE
                • UTC_TIME
                • UTC_TIMESTAMP
                • WEEK
                • WEEKDAY
                • WEEKOFYEAR
                • YEARWEEK
                • YEAR
                • ADDTIME
                • DAYNAME
                • DAY
              • String functions
                • ASCII
                • BIN
                • BIT_LENGTH
                • CHAR
                • CHAR_LENGTH
                • CHARACTER_LENGTH
                • CONCAT
                • CONCAT_WS
                • ELT
                • EXPORT_SET
                • FIELD
                • FIND_IN_SET
                • FORMAT
                • HEX
                • INSERT
                • INSTR
                • INT2IP
                • IP2INT
                • KEYVALUE
                • LCASE
                • LEFT
                • LENGTH
                • LOCATE
                • LOWER
                • LPAD
                • LTRIM
                • MAKE_SET
                • MD5_CONCAT_WS
                • MID
                • OCT
                • OCTET_LENGTH
                • ORD
                • POSITION
                • QUOTE
                • REGEXP
                • REGEXP_INSTR
                • REGEXP_LIKE
                • REGEXP_REPLACE
                • REGEXP_SUBSTR
                • REPEAT
                • REPLACE
                • REVERSE
                • RIGHT
                • RLIKE
                • RPAD
                • RTRIM
                • SPACE
                • SPLIT_PART
                • STRCMP
                • SUBSTR
                • SUBSTRING
                • SUBSTRING_INDEX
                • TRIM
                • UCASE
                • UNHEX
                • UPPER
                • URL_DECODE
                • URL_ENCODE
                • WEIGHT_STRING
                • TO_BASE64
                • FROM_BASE64
                • SOUNDEX
              • Conversion functions
                • CAST
                • CONVERT
                • DECODE_TRACE_ID
                • SCN_TO_TIMESTAMP
                • TIMESTAMP_TO_SCN
                • TO_CHAR(character)
                • TO_CHAR(number)
                • TO_CHAR(datetime)
              • Mathematical functions
                • ABS
                • ACOS
                • ASIN
                • ATAN
                • ATAN2
                • BIT_COUNT
                • CEIL
                • CEILING
                • CONV
                • COS
                • COT
                • CRC32
                • DEGREES
                • EXP
                • FLOOR
                • GENERATOR
                • LN
                • LOG
                • LOG10
                • LOG2
                • MOD
                • NEG
                • NORMAL
                • PI
                • POW
                • POWER
                • RADIANS
                • RAND
                • RANDOM
                • RANDSTR
                • ROUND
                • SIGN
                • SIN
                • SQRT
                • TAN
                • TRUNCATE
                • UNIFORM
                • ZIPF
              • Comparison functions
                • GREATEST
                • INTERVAL
                • ISNULL
                • LEAST
              • Process control functions
                • CASE
                • IF
                • IFNULL
                • NULLIF
                • ORA_DECODE
            • Aggregate functions
              • APPROX_COUNT_DISTINCT
              • AVG
              • BIT_AND
              • BIT_OR
              • BIT_XOR
              • COUNT
              • GROUP_CONCAT
              • GROUPING
              • MAX
              • MIN
              • STD
              • STDDEV
              • STDDEV_POP
              • STDDEV_SAMP
              • SUM
              • VAR_POP
              • VAR_SAMP
              • VARIANCE
            • Analysis functions
              • APPROX_COUNT_DISTINCT
              • AVG
              • BIT_AND
              • BIT_OR
              • BIT_XOR
              • COUNT
              • CUME_DIST
              • DENSE_RANK
              • FIRST_VALUE
              • LAG
              • LAST_VALUE
              • LEAD
              • MAX
              • MIN
              • NTH_VALUE
              • NTILE
              • PERCENT_RANK
              • PERCENTILE_CONT
              • RANK
              • ROW_NUMBER
              • STD
              • STDDEV
              • STDDEV_POP
              • STDDEV_SAMP
              • SUM
              • VAR_POP
              • VAR_SAMP
              • VARIANCE
            • Encryption functions
              • AES_DECRYPT
              • AES_ENCRYPT
              • COMPRESS
              • DECODE
              • DES_DECRYPT
              • DES_ENCRYPT
              • ENCODE
              • ENCRYPT
              • ENHANCED_AES_ENCRYPT
              • ENHANCED_AES_DECRYPT
              • MD5
              • PASSWORD
              • UNCOMPRESS
              • UNCOMPRESSED_LENGTH
              • RANDOM_BYTES
              • SHA
              • SHA1
              • SHA2
              • VALIDATE_PASSWORD_STRENGTH
              • SM3
              • SM4_ENCRYPT
              • SM4_DECRYPT
            • Information functions
              • BENCHMARK
              • CHARSET
              • COERCIBILITY
              • COLLATION
              • CONNECTION_ID
              • CURRENT_ROLE
              • CURRENT_USER
              • DATABASE
              • FOUND_ROWS
              • LAST_INSERT_ID
              • LAST_INSERT_ID Behavior Description
              • ICU_VERSION
              • OB_TRANSACTION_ID
              • ROW_COUNT
              • SCHEMA
              • SESSION_USER
              • SYSTEM_USER
              • USER
              • VERSION
              • OB_VERSION
            • JSON functions
              • Overview
              • Functions for creating JSON text
                • JSON_ARRAY
                • JSON_OBJECT
                • JSON_QUOTE
              • Functions for searching JSON text
                • JSON_CONTAINS
                • JSON_CONTAINS_PATH
                • JSON_EXTRACT
                • JSON_KEYS
                • JSON_OVERLAPS
                • JSON_SEARCH
                • JSON_VALUE
                • MEMBER OF
              • Functions for modifying JSON text
                • JSON_ARRAY_APPEND
                • JSON_APPEND
                • JSON_ARRAY_INSERT
                • JSON_INSERT
                • JSON_MERGE
                • JSON_MERGE_PATCH
                • JSON_MERGE_PRESERVE
                • JSON_REMOVE
                • JSON_REPLACE
                • JSON_SET
                • JSON_UNQUOTE
              • Functions for returning JSON text properties
                • JSON_DEPTH
                • JSON_LENGTH
                • JSON_TYPE
                • JSON_VALID
              • `JSON_TABLE`
              • JSON utility functions
                • JSON_PRETTY
                • JSON_STORAGE_SIZE
              • JSON aggregate functions
                • JSON_ARRAYAGG
                • JSON_OBJECTAGG
              • JSON schema validation functions
                • JSON_SCHEMA_VALID
                • JSON_SCHEMA_VALIDATION_REPORT
            • XML functions
              • Overview
              • Functions for querying XML data
                • EXTRACTVALUE
              • Functions for modifying XML data
                • UPDATEXML
            • Spatial functions
              • Overview
              • Functions that create geometry values
              • Spatial operation functions
              • Spatial relation functions
              • Geometry property functions
              • Geometry format conversion functions
              • Spatial analysis functions
              • Spatial constructor functions
              • Spatial accessor functions
              • Spatial format conversion functions
              • Geometry processing functions
              • _ST_GeoHash
            • Performance schema functions
              • FORMAT_BYTES
              • FORMAT_PICO_TIME
            • Lock functions
              • Overview of lock functions
              • GET_LOCK
              • IS_FREE_LOCK
              • IS_USED_LOCK
              • RELEASE_ALL_LOCKS
              • RELEASE_LOCK
            • Bitmap functions
              • Overview
              • Bitmap constructors
              • Bitmap cardinality functions
              • Roaring bitmap operation functions
              • Roaring bitmap judgment functions
              • Roaring bitmap output functions
              • Roaring bitmap aggregate functions
            • Array functions
              • Overview
              • Array constructor functions
              • Array judgment functions
              • Array output functions
              • Array functions
            • Text processing functions
              • TOKENIZE
            • Audit functions
              • Overview
              • AUDIT_LOG_FILTER_REMOVE_FILTER
              • AUDIT_LOG_FILTER_REMOVE_USER
              • AUDIT_LOG_FILTER_SET_FILTER
              • AUDIT_LOG_FILTER_SET_USER
            • Map functions
              • Overview of map functions
              • Mapping constructor
              • Mapping comparison functions and operators
              • Mapping operation functions
            • Sequence functions
              • NEXTVAL(SEQ) function
              • CURRVAL(SEQ) function
            • Other functions
              • ANY_VALUE
              • BIN_TO_UUID
              • COALESCE
              • DEFAULT
              • NAME_CONST
              • INET_ATON
              • INET_NTOA
              • INET6_ATON
              • INET6_NTOA
              • IS_IPV4
              • IS_IPV4_COMPAT
              • IS_IPV6
              • IS_UUID
              • MATCH AGAINST
              • NVL
              • UUID_TO_BIN
              • SLEEP
              • UUID
              • UUID_SHORT
              • VALUES
          • Queries and subqueries
            • Overview
            • Subqueries
            • Joins
            • Full-text queries
          • SQL statements
            • General syntax
            • Common table expressions
            • ALTER COMPILE
            • ALTER DATABASE
            • ALTER MATERIALIZED VIEW
            • ALTER MATERIALIZED VIEW LOG
            • ALTER EXTERNAL TABLE
            • ALTER OUTLINE
            • ALTER SENSITIVE RULE
            • ALTER SEQUENCE
            • ALTER/CHANGE/MODIFY EXTERNAL_STORAGE_DEST
            • MAJOR and MINOR
            • ALTER TABLE
            • ALTER TABLEGROUP
            • ALTER TABLESPACE
            • ALTER USER
            • ALTER VIEW
            • ALTER INSTANCE ROTATE INNODB MASTER KEY
            • ANALYZE
            • CACHE INDEX
            • CREATE CONCURRENT_LIMITING_RULE
            • CREATE DATABASE LINK
            • CREATE DATABASE
            • CREATE EXTERNAL CATALOG
            • CREATE EXTERNAL TABLE
            • CREATE INDEX
            • CREATE MATERIALIZED VIEW
            • CREATE MATERIALIZED VIEW LOG
            • CREATE OUTLINE
            • CREATE FORMAT OUTLINE
            • CREATE RESTORE POINT
            • CREATE ROLE
            • CREATE SEQUENCE
            • CREATE SENSITIVE RULE
            • CREATE TABLE
            • CREATE TABLEGROUP
            • CREATE TABLESPACE
            • CREATE USER
            • CREATE VIEW
            • CHECKSUM TABLE
            • CREATE EVENT
            • DEALLOCATE PREPARE
            • DROP DATABASE LINK
            • DELETE
            • DESCRIBE
            • DROP CATALOG
            • DROP CONCURRENT_LIMITING_RULE
            • DROP DATABASE
            • DROP INDEX
            • DROP MATERIALIZED VIEW
            • DROP MATERIALIZED VIEW LOG
            • DROP OUTLINE
            • DROP ROLE
            • DROP SENSITIVE RULE
            • DROP TABLE
            • DROP TABLEGROUP
            • DROP TABLESPACE
            • DROP SEQUENCE
            • DROP USER
            • DROP VIEW
            • DROP RESTORE POINT
            • EXECUTE
            • EXPLAIN
            • FLASHBACK
            • FLUSH TABLE
            • GRANT
            • HELP
            • INSERT
            • KILL
            • LOAD DATA
            • LOAD INDEX INTO CACHE
            • LOCK TABLES
            • OPTIMIZE
            • PREPARE
            • PURGE
            • PURGE RECYCLEBIN
            • RENAME USER
            • RENAME TABLE
            • REPLACE
            • REPAIR TABLE
            • REVOKE
            • SAVEPOINT
            • SCHEMA
            • SELECT INTO
            • SELECT
              • SELECT
              • JOIN clause
              • WINDOW clause
              • UNION clause
            • SET DEFAULT ROLE
            • SET
            • SET CATALOG
            • SET CHARSET
            • SET NAMES
            • SET PASSWORD
            • SET ROLE
            • SET TRANSACTION
            • SHOW
            • SUBMIT JOB
            • SHOW JOB STATUS
            • CANCEL JOB
            • TRANSACTION
            • TRUNCATE TABLE
            • UNLOCK TABLES
            • UPDATE
            • USE
            • VALUES
            • XA TRANSACTION
          • DDL feature
            • Overview
            • Online and offline DDL operations
            • Index operations
            • Primary key operations
            • Column operations
            • Generated column operations
            • Foreign key operations
            • Table operations
            • Partition operations
            • Column type change rules
            • Conversion rules for numeric data types
          • Pseudocolumns
            • Overview of pseudocolumns
            • PARTITIONID pseudo column
            • Sequence pseudo columns
        • User tenants (Oracle mode)
          • Pseudocolumns
            • Overview
            • Hierarchical query pseudocolumns
            • Sequence pseudocolumns
            • ORA_ROWSCN pseudocolumn
            • ROWNUM pseudocolumn
            • ROWID pseudocolumn
            • PARTITIONID pseudocolumns
          • Basic elements
            • Built-in data types
              • Overview
              • Character data types
                • Overview
                • CHAR data type
                • NCHAR data type
                • NVARCHAR2 data type
                • VARCHAR2 data type
                • VARCHAR data type
              • Numeric data types
                • Overview
                • NUMBER data type
                • FLOAT data type
                • Floating-point numbers
                • Precedence of numeric data types
              • Datetime and interval data types
                • Overview
                • DATE data type
                • TIMESTAMP data type
                • TIMESTAMP WITH TIME ZONE data type
                • TIMESTAMP WITH LOCAL TIME ZONE data type
                • INTERVAL YEAR TO MONTH data type
                • INTERVAL DAY TO SECOND data type
                • Calculation of dates, timestamps, and intervals
              • RAW data type
              • Large object data types
                • Overview
                • BLOB data type
                • CLOB data type
                • LOB types
              • Rowid data types
              • User-defined data types
              • Any types
              • JSON data types
                • Overview
                • Create a column of the JSON data type
                • Query JSON data
                • Conversion rules for JSON data types
              • XML data types
                • Overview
                • XML data definition
                • Create a column of the XMLType data type
                • Query XMLType data
                • Conversion of XMLType data
              • Spatial data types
                • Overview
                • Create a spatial column
                • SDO_GEOMETRY attribute access
                • Create a spatial index
            • Data type comparison rules
              • Overview
              • Numeric value comparison rules
              • Date value comparison rules
              • Character value comparison rules
              • Data type precedence
              • Data type conversion rules
              • Security considerations for data conversion
            • Literals
              • Overview
              • Text literals
              • Numeric literals
              • Datetime literals
                • Date literals
                • Timestamp literals
              • Interval literals
            • Format model
              • Overview
              • Number format models
              • Datetime format models
              • RR datetime format element
              • String-to-date conversion rules
            • NULL value
              • Overview
              • NULLs in SQL functions
              • NULLs in comparison conditions
              • NULLs in conditional expressions
            • Annotations
              • Overview
              • Comments for SQL statements
              • Comments on schema and non-schema objects
              • Hints
                • Overview
                • Use query block name and QB_NAME hint to control query optimization
                • Hint list
                  • Global hints
                    • Optimizer Stats Hint
                    • Transform Hint
                    • Other hints under the GLOBAL hint
                  • Optimized hints
                    • Access path hints under the Optimized Hint type
                    • Join Order Hints in the Optimized Hint Category
                    • Join operation hints in the Optimized Hint category
                    • Subquery hints under the Optimized Hint category
                    • Group By Hint
                    • DISTINCT hint
                    • Set Hint
                    • Distributed DML hints in the Optimized Hint category
                  • Transform hints
                    • Stmt Transform Hint
                    • Cost Based Transform Hint
                    • Heuristics transform hints
                    • Other hints under the Transform Hint type
                  • Outline related hints
                  • Other hints
            • Database objects
              • Schema objects
              • Non-schema objects
            • Database naming conventions
              • Overview
              • Suggestions on schema object names
            • Database object reference methods
              • Overview
              • Reference schema objects
              • Reference objects in a remote database
                • Create a DBLink
                • Reference a DBLink
              • Refer to partitioned tables and indexes
              • Reference an attribute or method of an object type
            • Character sets and collations
          • Operators
            • Overview of operators
            • Operator precedence
            • Arithmetic operators
            • Concatenation operator
            • Hierarchical query operators
            • Set operators
            • COLLATE operator
          • Functions
            • Overview
            • Single-row functions
              • Numeric functions
                • ABS
                • ACOS
                • ASIN
                • ATAN
                • ATAN2
                • BITAND
                • CEIL
                • COS
                • COSH
                • EXP
                • FLOOR
                • GENERATOR
                • LN
                • LOG
                • MOD
                • NANVL
                • NORMAL
                • POWER
                • REMAINDER
                • ROUND
                • RANDOM
                • RANDSTR
                • SIGN
                • SIN
                • SINH
                • SQRT
                • TAN
                • TANH
                • TRUNC
                • UNIFORM
                • WIDTH_BUCKET
                • ZIPF
              • String functions that return a string
                • CHR
                • CONCAT
                • INITCAP
                • LOWER
                • LPAD
                • LTRIM
                • NLS_LOWER
                • NLSSORT
                • NLS_UPPER
                • REGEXP_REPLACE
                • REGEXP_SUBSTR
                • REPLACE
                • RPAD
                • RTRIM
                • SUBSTR
                • TRANSLATE
                • TRANSLATE ... USING
                • TRIM
                • UPPER
              • String functions that return numbers
                • ASCII
                • INSTR
                • LENGTH
                • REGEXP_COUNT
                • REGEXP_INSTR
              • Datetime functions
                • ADD_MONTHS
                • CURRENT_DATE
                • CURRENT_TIMESTAMP
                • DBTIMEZONE
                • EXTRACT(datetime)
                • FROM_TZ
                • LAST_DAY
                • LOCALTIMESTAMP
                • MONTHS_BETWEEN
                • NEXT_DAY
                • NUMTODSINTERVAL
                • NUMTOYMINTERVAL
                • ROUND (date)
                • SESSIONTIMEZONE
                • SYS_EXTRACT_UTC
                • SYSDATE
                • SYSTIMESTAMP
                • TO_CHAR(datetime)
                • TO_DSINTERVAL
                • TO_TIMESTAMP
                • TO_TIMESTAMP_TZ
                • TO_YMINTERVAL
                • TRUNC (date)
                • TZ_OFFSET
              • Generic comparison functions
                • GREATEST
                • LEAST
              • Conversion functions
                • ASCIISTR
                • CAST
                • CHARTOROWID
                • CONVERT
                • HEXTORAW
                • NUMTODSINTERVAL
                • NUMTOYMINTERVAL
                • RAWTOHEX
                • ROWIDTOCHAR
                • ROWIDTONCHAR
                • SCN_TO_TIMESTAMP
                • TIMESTAMP_TO_SCN
                • TO_BINARY_DOUBLE
                • TO_BINARY_FLOAT
                • TO_BLOB
                • TO_CHAR(character)
                • TO_CHAR(datetime)
                • TO_CHAR(number)
                • TO_CLOB
                • TO_DATE
                • TO_DSINTERVAL
                • TO_MULTI_BYTE
                • TO_NUMBER
                • TO_NCHAR(character)
                • TO_NCHAR(datetime)
                • TO_NCHAR(number)
                • TO_SINGLE_BYTE
                • TO_TIMESTAMP
                • TO_TIMESTAMP_TZ
                • TO_YMINTERVAL
                • UNISTR
              • Encoding and decoding functions
                • DECODE
                • DUMP
                • ORA_HASH
                • VSIZE
              • Null value related functions
                • COALESCE
                • LNNVL
                • NANVL
                • NULLIF
                • NVL
                • NVL2
              • Environment and identifier functions
                • SYS_CONTEXT
                • SYS_GUID
                • UID
                • USER
                • USERENV
                • OB_VERSION
              • Hierarchical functions
                • SYS_CONNECT_BY_PATH
              • JSON functions
                • Overview
                • Create JSON text functions
                  • JSON_ARRAY
                  • JSON_OBJECT
                  • JSON_ARRAYAGG
                  • JSON_OBJECTAGG
                • Query JSON text functions
                  • JSON_VALUE
                  • JSON_QUERY
                  • JSON_EXISTS
                  • JSON_TABLE
                • Validate JSON text functions
                  • JSON_EQUAL
                • Modify JSON text functions
                  • JSON_MERGEPATCH
              • XML functions
                • Overview
                • Construct XMLType data functions
                  • XMLAGG
                  • XMLATTRIBUTES
                  • XMLELEMENT
                  • XMLPARSE
                  • XMLCONCAT
                  • XMLFOREST
                • Query XMLType data functions
                  • EXTRACT
                  • EXTRACTVALUE
                  • XMLSERIALIZE
                  • XMLCAST
                  • XMLTABLE
                  • XMLSEQUENCE
                  • EXISTSNODE
                • Modify XMLType data functions
                  • UPDATEXML
                  • INSERTCHILDXML
                  • DELETEXML
              • Spatial functions
                • Overview of spatial functions
                • Constructor functions
                • Spatial query functions
                • Format conversion functions
            • Aggregate functions
              • APPROX_COUNT_DISTINCT
              • AVG
              • CORR
              • COUNT
              • COVAR_POP
              • COVAR_SAMP
              • CUME_DIST
              • DENSE_RANK
              • GROUPING
              • KEEP
              • LISTAGG
              • MAX
              • MEDIAN
              • MIN
              • PERCENT_RANK
              • PERCENTILE_CONT
              • PERCENTILE_DISC
              • RANK
              • REGR_(Linear Regression)
              • ROLLUP
              • STDDEV
              • STDDEV_POP
              • STDDEV_SAMP
              • SUM
              • VAR_POP
              • VAR_SAMP
              • VARIANCE
              • WMSYS.WM_CONCAT/WM_CONCAT
              • GROUP_ID
              • GROUPING_ID
            • Analysis functions
              • Overview
              • AVG
              • CORR
              • COUNT
              • COVAR_POP
              • COVAR_SAMP
              • CUME_DIST
              • DENSE_RANK
              • FIRST_VALUE
              • KEEP
              • LAG
              • LAST_VALUE
              • LEAD
              • LISTAGG
              • MAX
              • MEDIAN
              • MIN
              • NTILE
              • NTH_VALUE
              • PERCENT_RANK
              • PERCENTILE_CONT
              • PERCENTILE_DISC
              • RANK
              • RATIO_TO_REPORT
              • REGR_(Linear Regression)
              • ROW_NUMBER
              • STDDEV
              • STDDEV_POP
              • STDDEV_SAMP
              • SUM
              • VAR_POP
              • VAR_SAMP
              • VARIANCE
              • WMSYS.WM_CONCAT/WM_CONCAT
            • Information functions
              • OB_TRANSACTION_ID
            • Sequence functions
              • NEXTVAL(SEQ) function
              • CURRVAL(SEQ) function
          • Expressions
            • Overview
            • Simple expressions
            • Compound expressions
            • Case expressions
            • Column expressions
            • CURSOR expressions
            • Datetime expressions
            • Function expressions
            • Interval expressions
            • Scalar subquery expressions
            • Type constructor expressions
            • Expression list
          • Conditions
            • Overview
            • Condition precedence
            • Comparison conditions
            • Floating-point conditions
            • Logical conditions
            • Pattern-matching conditions
            • NULL conditions
            • Compound conditions
            • BETWEEN condition
            • EXISTS condition
            • IN condition
          • Queries and subqueries
            • Overview
            • Simple queries
            • Hierarchical queries
            • Composite queries
            • JOIN queries
            • Subqueries
            • Lateral derived tables
            • DUAL table query
          • SQL statements
            • DDL
              • ALTER EXTERNAL TABLE
              • ALTER INDEX
              • ALTER KEYSTORE
              • ALTER MATERIALIZED VIEW
              • ALTER MATERIALIZED VIEW LOG
              • ALTER OUTLINE
              • ALTER PROFILE
              • ALTER ROLE
              • ALTER SEQUENCE
              • ALTER SESSION
              • ALTER SYSTEM FLUSH CACHE
              • ALTER/CHANGE/MODIFY EXTERNAL_STORAGE_DEST
              • ALTER SYSTEM SET PARAMETER
              • ALTER TABLE
              • ALTER TABLEGROUP
              • ALTER TABLESPACE
              • ALTER USER
              • COMMENT
              • CREATE CONTEXT
              • CREATE CONCURRENT_LIMITING_RULE
              • CREATE DIRECTORY
              • CREATE DATABASE LINK
              • CREATE EXTERNAL CATALOG
              • CREATE EXTERNAL TABLE
              • CREATE INDEX
              • CREATE KEYSTORE
              • CREATE MATERIALIZED VIEW
              • CREATE MATERIALIZED VIEW LOG
              • CREATE OUTLINE
              • CREATE PROFILE
              • CREATE FORMAT OUTLINE
              • CREATE ROLE
              • CREATE SEQUENCE
              • CREATE SYNONYM
              • CREATE TABLE
              • CREATE TABLEGROUP
              • CREATE TABLESPACE
              • CREATE USER
              • CREATE VIEW
              • DROP CATALOG
              • DROP CONTEXT
              • DROP CONCURRENT_LIMITING_RULE
              • DROP DATABASE LINK
              • DROP DIRECTORY
              • DROP INDEX
              • DROP MATERIALIZED VIEW
              • DROP MATERIALIZED VIEW LOG
              • DROP OUTLINE
              • DROP PROFILE
              • DROP ROLE
              • DROP SEQUENCE
              • DROP SYNONYM
              • DROP TABLE
              • DROP TABLEGROUP
              • DROP TABLESPACE
              • DROP USER
              • DROP VIEW
              • RENAME
              • TRUNCATE TABLE
              • MAJOR and MINOR
            • DML
              • DELETE
              • INSERT
              • MERGE
              • PURGE
              • EXPLAIN
              • SELECT
                • SIMPLE SELECT
                • Set-based SELECT
                • WITH CLAUSE
                • JOIN clause
              • UPDATE
            • DCL
              • ANALYZE
              • ALTER SYSTEM KILL SESSION
              • AUDIT
              • COMMIT
              • FLASHBACK TABLE BEFORE DROP
              • GRANT
              • KILL
              • LOAD DATA
              • LOCK TABLE
              • REVOKE
              • ROLLBACK
              • SAVEPOINT
              • SELECT INTO
              • SET CATALOG
              • SET NAMES
              • SET PASSWORD
              • SET ROLE
              • SET VARIABLE
              • SHOW
              • SHRINK
              • TRANSACTION
          • DDL feature
            • Overview
            • Online and offline DDL operations
            • Index operations
            • Primary key operations
            • Column operations
            • Generated column operations
            • Foreign key operations
            • Table operations
            • Partition operations
            • Column type change rules
            • Conversion rules for numeric data types
      • SQL specifications and practices
        • Limitations on writing SQL statements
        • SQL writing specifications
          • SELECT statements
          • DML statement writing standards
          • DDL statements
          • Multi-table join statements
          • Table scan
          • Transactions
          • Cache
          • How to use hints
          • Others
        • SQL statement examples
          • Implicit data type conversion
          • Join tables
          • Weak consistency read
          • Paging
      • Reserved keywords (MySQL mode)
      • Reserved keywords (Oracle mode)
      • Data type conversion behavior in strict mode for MySQL tenants
    • PL reference
      • What is PL
        • PL overview
        • Main features of PL
        • PL architecture
      • PL reference (MySQL mode)
        • Syntax of PL stored programs
        • PL stored procedures
          • Overview
          • Variables in stored programs
          • Stored procedures
          • Stored objects and privilege management
          • Stored functions
          • Triggers
          • EVENT
          • Limitations on stored programs
        • PL cursors
          • Overview
          • Cursor execution process
          • Limitations on server cursors
        • PL conditional control statements
          • CASE
          • IF
          • ITERATE
          • LEAVE
          • LOOP
          • REPEAT
          • RETURN
          • WHILE
        • PL data manipulation statements
          • CALL
          • DO
        • PL data definition statements
          • ALTER FUNCTION
          • ALTER PROCEDURE
          • CREATE FUNCTION
          • CREATE PROCEDURE
          • CREATE TRIGGER
          • DROP FUNCTION
          • DROP PROCEDURE
          • DROP TRIGGER
        • PL database management statements
          • SHOW CREATE FUNCTION
          • SHOW CREATE PROCEDURE
          • SHOW CREATE TRIGGER
          • SHOW FUNCTION STATUS
          • SHOW PROCEDURE STATUS
          • SHOW TRIGGERS
        • PL related dictionary views
          • INFORMATION_SCHEMA PARAMETERS
          • INFORMATION_SCHEMA ROUTINES
          • INFORMATION_SCHEMA TRIGGERS
        • PL exception handling
          • Overview
          • DECLARE ... CONDITION
          • DECLARE ... HANDLER
          • GET DIAGNOSTICS
          • RESIGNAL
          • SIGNAL
          • Scope of procedures
          • Diagnostics area
          • Exception handling and OUT/INOUT parameters
          • Limitations on exception handling
        • PL system packages
          • Overview
          • DBMS_MVIEW
            • Overview
            • PURGE_LOG
            • REFRESH
          • DBMS_MVIEW_STATS
            • Overview
            • PURGE_REFRESH_STATS
            • SET_MVREF_STATS_PARAMS
            • SET_SYSTEM_DEFAULT
          • DBMS_PARTITION
            • DBMS_PARTITION overview
            • MANAGE_DYNAMIC_PARTITION
          • DBMS_RESOURCE_MANAGER
            • Overview
            • CREATE_CONSUMER_GROUP
            • CREATE_PLAN
            • CREATE_PLAN_DIRECTIVE
            • DELETE_CONSUMER_GROUP
            • DELETE_PLAN
            • DELETE_PLAN_DIRECTIVE
            • SET_CONSUMER_GROUP_MAPPING
            • UPDATE_PLAN_DIRECTIVE
          • DBMS_SPM
            • Overview
            • ACCEPT_SQL_PLAN_BASELINE
            • ALTER_SQL_PLAN_BASELINE
            • CANCEL_EVOLVE_TASK
            • CONFIGURE
            • DROP_EVOLVE_TASK
            • DROP_SQL_PLAN_BASELINE
            • LOAD_PLANS_FROM_CURSOR_CACHE
          • DBMS_STATS
            • Overview
            • ALTER_STATS_HISTORY_RETENTION
            • CREATE_STAT_TABLE
            • DELETE_COLUMN_STATS
            • DELETE_INDEX_STATS
            • DELETE_TABLE_STATS
            • DELETE_SCHEMA_STATS
            • DELETE_SCHEMA_PREFS
            • DELETE_SYSTEM_STATS
            • DELETE_TABLE_PREFS
            • DROP_STAT_TABLE
            • EXPORT_COLUMN_STATS
            • EXPORT_INDEX_STATS
            • EXPORT_TABLE_STATS
            • EXPORT_SCHEMA_STATS
            • FLUSH_DATABASE_MONITORING_INFO
            • GATHER_INDEX_STATS
            • GATHER_TABLE_STATS
            • GATHER_SCHEMA_STATS
            • GATHER_SYSTEM_STATS
            • GET_STATS_HISTORY_AVAILABILITY
            • GET_STATS_HISTORY_RETENTION
            • GET_PARAM
            • GET_PREFS
            • IMPORT_INDEX_STATS
            • IMPORT_COLUMN_STATS
            • IMPORT_TABLE_STATS
            • IMPORT_SCHEMA_STATS
            • LOCK_PARTITION_STATS
            • LOCK_SCHEMA_STATS
            • LOCK_TABLE_STATS
            • RESTORE_TABLE_STATS
            • RESTORE_SCHEMA_STATS
            • RESET_GLOBAL_PREF_DEFAULTS
            • RESET_PARAM_DEFAULTS
            • PURGE_STATS
            • SET_COLUMN_STATS
            • SET_INDEX_STATS
            • SET_TABLE_STATS
            • SET_GLOBAL_PREFS
            • SET_PARAM
            • SET_SCHEMA_PREFS
            • SET_SYSTEM_STATS
            • SET_TABLE_PREFS
            • UNLOCK_PARTITION_STATS
            • UNLOCK_SCHEMA_STATS
            • UNLOCK_TABLE_STATS
            • CANCEL_GATHER_STATS
          • DBMS_TRUSTED_CERTIFICATE_MANAGER
            • Overview
            • ADD_TRUSTED_CERTIFICATE
            • DELETE_TRUSTED_CERTIFICATE
            • UPDATE_TRUSTED_CERTIFICATE
          • DBMS_UDR
            • Overview
            • CREATE_RULE
            • DISABLE_RULE
            • ENABLE_RULE
            • REMOVE_RULE
          • DBMS_VECTOR
            • Overview of DBMS_VECTOR
            • REFRESH_INDEX
            • REBUILD_INDEX
            • INDEX_VECTOR_MEMORY_ESTIMATE
            • INDEX_VECTOR_MEMORY_ADVISOR
          • DBMS_WORKLOAD_REPOSITORY
            • Overview
            • ASH_REPORT
            • CREATE_SNAPSHOT
            • DROP_SNAPSHOT_RANGE
            • MODIFY_SNAPSHOT_SETTINGS
          • DBMS_XPLAN
            • Overview
            • DISPLAY_ACTIVE_SESSION_PLAN
            • DISPLAY_CURSOR
            • DISPLAY
            • DISABLE_OPT_TRACE
            • DISPLAY_SQL_PLAN_BASELINE
            • ENABLE_OPT_TRACE
            • SET_OPT_TRACE_PARAMETER
          • DBMS_LIMIT_CALCULATOR
            • Overview
            • CALCULATE_MIN_PHY_RES_NEEDED_BY_UNIT
            • CALCULATE_MIN_PHY_RES_NEEDED_BY_LOGIC_RES
            • CALCULATE_MIN_PHY_RES_NEEDED_BY_STANDBY_TENANT
          • DBMS_EXTERNAL_TABLE
            • Overview
            • AUTO_REFRESH_EXTERNAL_TABLE
        • Reserved and non-reserved PL keywords
      • PL reference (Oracle mode)
        • PL language basics
          • Character sets
          • Lexical elements
          • Syntax
          • Reference identifiers
          • Identifier scope and visibility
          • Assignment
          • Expressions
          • PL blocks
          • Subprograms
          • Error-reporting functions
        • PL data types
          • Overview
          • SQL data types
          • LOB data types
          • BOOLEAN type
          • User-defined subtypes
          • PLS_INTEGER and BINARY_INTEGER
          • Arrays
          • PL JSON data types
        • PL process control
          • Overview
          • Conditional control
          • Loop control
          • Sequential control
        • PL collections and records
          • Overview
          • Collections
          • Associative arrays
          • Varrays
          • Nested tables
          • Collection constructors
          • Collection methods
            • Overview
            • DELETE method
            • TRIM method
            • EXTEND method
            • EXISTS method
            • FIRST and LAST methods
            • COUNT method
            • LIMIT method
            • PRIOR and NEXT methods
          • Records
          • Insert records into a table and update a table by using records
          • Create and call a subprogram with record type parameters
        • PL static SQL
          • Overview
          • Cursors
            • Overview
            • Cursor attributes
            • Implicit cursors
            • Explicit cursors
            • Cursor variables
            • Use FOR loops to iterate over a cursor
            • Modify and drop a cursor
          • Transaction processing and control
          • Autonomous transactions
            • Overview
            • Control autonomous transactions
            • Autonomous triggers
            • Call autonomous functions from SQL statements
          • FORALL and BULK COLLECT
        • PL dynamic SQL
          • Overview
          • Execute dynamic SQL statements
          • DBMS_SQL system package
        • PL stored procedures and functions
          • Overview
          • Create a stored procedure
          • Create a function
          • Manage stored procedures and functions
          • Privilege control
          • Pipeline functions
            • Overview
            • Create a pipelined table function
            • Application
          • User-defined functions
            • Overview
            • Interface for user-defined aggregate functions
            • Create a user-defined aggregate function
            • Use user-defined aggregate functions
          • Collection of stored procedure information and its impact on parallel execution of SQL statements
          • PL Database Link
        • PL triggers
          • Overview
          • Create a DML trigger
          • Modify and drop a trigger
          • Disable or enable a trigger
          • Query trigger information
          • INSTEAD OF DML triggers
          • Composite DML triggers
          • System triggers
        • PL packages
          • Overview
          • Create a package
          • Overloaded programs in a package
          • Manage packages
          • Definition of the PL environment by the STANDARD package
        • PL exception handling
          • Overview
          • Compile-time warnings
          • Exception types
          • Exception handling processes
        • DDL operations on stored PL units
          • Overview
          • ALTER FUNCTION
          • ALTER PACKAGE
          • ALTER PROCEDURE
          • ALTER TRIGGER
          • ALTER TYPE
          • CREATE FUNCTION
          • CREATE PACKAGE
          • CREATE PACKAGE BODY
          • CREATE PROCEDURE
          • CREATE TRIGGER
          • CREATE TYPE
          • CREATE TYPE BODY
          • DROP FUNCTION
          • DROP PACKAGE
          • DROP PROCEDURE
          • DROP TRIGGER
          • DROP TYPE
          • DROP TYPE BODY
        • PL label security package
          • Overview
          • SA_SYSDBA policy management package
            • Overview
            • SA_SYSDBA.ALTER_POLICY
            • SA_SYSDBA.CREATE_POLICY
            • SA_SYSDBA.DROP_POLICY
          • SA_COMPONENTS label component package
            • Overview of the SA_COMPONENTS package
            • SA_COMPONENTS.ALTER_LEVEL
            • SA_COMPONENTS.CREATE_LEVEL
            • SA_COMPONENTS.DROP_LEVEL
          • SA_LABEL_ADMIN label management package
            • Overview
            • SA_LABEL_ADMIN.ALTER_LABEL
            • SA_LABEL_ADMIN.CREATE_LABEL
            • SA_LABEL_ADMIN.DROP_LABEL
          • SA_POLICY_ADMIN policy management package
            • Overview
            • SA_POLICY_ADMIN.APPLY_TABLE_POLICY
            • SA_POLICY_ADMIN.DISABLE_TABLE_POLICY
            • SA_POLICY_ADMIN.ENABLE_TABLE_POLICY
            • SA_POLICY_ADMIN.REMOVE_TABLE_POLICY
          • SA_USER_ADMIN user label management package
            • Overview
            • SA_USER_ADMIN.SET_LEVELS
          • SA_SESSION session management package
            • Overview
            • SA_SESSION.LABEL
            • SA_SESSION.RESTORE_DEFAULT_LABELS
            • SA_SESSION.ROW_LABEL
            • SA_SESSION.SET_LABEL
            • SA_SESSION.SET_ROW_LABEL
        • PL system package (Oracle mode)
          • Overview
          • DBMS_APPLICATION_INFO
            • Overview
            • READ_CLIENT_INFO
            • READ_MODULE
            • SET_ACTION
            • SET_CLIENT_INFO
            • SET_MODULE
          • DBMS_AUDIT_MGMT
            • Overview
            • CLEAN_AUDIT_TRAIL
            • CREATE_PURGE_JOB
            • DROP_PURGE_JOB
            • SET_LAST_ARCHIVE_TIMESTAMP
            • SET_PURGE_JOB_STATUS
          • DBMS_CRYPTO
            • Overview
            • ENCRYPT
            • DECRYPT
            • HASH
          • DBMS_DEBUG
            • Overview
            • ATTACH_SESSION
            • CONTINUE
            • DEBUG_ON
            • DEBUG_OFF
            • DETACH_SESSION
            • DELETE_BREAKPOINT
            • DISABLE_BREAKPOINT
            • ENABLE_BREAKPOINT
            • GET_VALUE
            • GET_VALUES
            • GET_RUNTIME_INFO
            • GET_TIMEOUT_BEHAVIOUR
            • INITIALIZE
            • PROBE_VERSION
            • PRINT_BACKTRACE
            • SET_TIMEOUT
            • SET_TIMEOUT_BEHAVIOUR
            • SET_BREAKPOINT
            • SHOW_BREAKPOINTS
          • DBMS_DESCRIBE
            • Overview
            • DESCRIBE_PROCEDURE
          • DBMS_JOB
            • Overview
            • BROKEN
            • CHANGE
            • ZONE
            • INTERVAL
            • NEXT_DATE
            • REMOVE
            • RUN
            • SUBMIT
            • USER_EXPORT
            • WHAT
          • DBMS_LOB
            • Overview
            • APPEND
            • CLOSE
            • COPY
            • CREATETEMPORARY
            • ERASE
            • FREETEMPORARY
            • GETLENGTH
            • ISOPEN
            • INSTR
            • ISTEMPORARY
            • OPEN
            • READ
            • SUBSTR
            • TRIM
            • WRITE
            • WRITEAPPEND
          • DBMS_LOCK
            • Overview
            • ALLOCATE_UNIQUE
            • ALLOCATE_UNIQUE_AUTONOMOUS
            • REQUEST
            • SLEEP
            • RELEASE
          • DBMS_METADATA
            • Overview
            • GET_DDL
            • GET_TABLE_INDEX_DDL
          • DBMS_MVIEW
            • Overview
            • PURGE_LOG
            • REFRESH
          • DBMS_MONITOR
            • Overview
            • OB_SESSION_TRACE_ENABLE
            • OB_SESSION_TRACE_DISABLE
            • OB_CLIENT_ID_TRACE_ENABLE
            • OB_CLIENT_ID_TRACE_DISABLE
            • OB_MOD_ACT_TRACE_ENABLE
            • OB_MOD_ACT_TRACE_DISABLE
            • OB_TENANT_TRACE_ENABLE
            • OB_TENANT_TRACE_DISABLE
          • DBMS_MVIEW_STAT
            • Overview
            • PURGE_REFRESH_STATS
            • SET_MVREF_STATS_PARAMS
            • SET_SYSTEM_DEFAULT
          • DBMS_OUTPUT
            • Overview
            • DISABLE
            • ENABLE
            • GET_LINE
            • GET_LINES
            • NEW_LINE
            • PUT
            • PUT_LINE
          • DBMS_PLAN_CACHE
            • Overview
            • PURGE
          • DBMS_PARTITION
            • Overview of DBMS_PARTITION
            • MANAGE_DYNAMIC_PARTITION
          • DBMS_RANDOM
            • Overview
            • INITIALIZE
            • NORMAL
            • RANDOM
            • SEED
            • STRING
            • TERMINATE
            • VALUE
          • DBMS_RESOURCE_MANAGER
            • Overview
            • CREATE_CONSUMER_GROUP
            • CREATE_PLAN
            • CREATE_PLAN_DIRECTIVE
            • DELETE_CONSUMER_GROUP
            • DELETE_PLAN
            • DELETE_PLAN_DIRECTIVE
            • SET_CONSUMER_GROUP_MAPPING
            • UPDATE_PLAN_DIRECTIVE
          • DBMS_SCHEDULER
            • Overview
            • CREATE_JOB
            • CREATE_JOB_CLASS
            • CREATE_PROGRAM
            • DEFINE_PROGRAM_ARGUMENT
            • DISABLE
            • DISABLE
            • DROP_JOB
            • DROP_JOB_CLASS
            • DROP_PROGRAM
            • ENABLE
            • ENABLE
            • GENERATE_JOB_NAME
            • PURGE_LOG
            • RUN_JOB
            • SET_ATTRIBUTE
            • SET_JOB_ARGUMENT_VALUE
            • STOP_JOB
          • DBMS_SESSION
            • Overview
            • CLEAR_ALL_CONTEXT
            • CLEAR_CONTEXT
            • CLEAR_IDENTIFIER
            • RESET_PACKAGE
            • SET_CONTEXT
            • SET_IDENTIFIER
          • DBMS_SPM
            • Overview
            • ACCEPT_SQL_PLAN_BASELINE
            • ALTER_SQL_PLAN_BASELINE
            • CANCEL_EVOLVE_TASK
            • CONFIGURE
            • DROP_EVOLVE_TASK
            • DROP_SQL_PLAN_BASELINE
            • LOAD_PLANS_FROM_CURSOR_CACHE
          • DBMS_SQL
            • Overview of DBMS_SQL
            • BIND_VARIABLE
            • CLOSE_CURSOR
            • COLUMN_VALUE
            • DEFINE_COLUMN
            • DEFINE_ARRAY
            • DESCRIBE_COLUMNS
            • EXECUTE
            • EXECUTE_AND_FETCH
            • FETCH_ROWS
            • IS_OPEN
            • LAST_ERROR_POSITION
            • OPEN_CURSOR
            • PARSE
            • VARIABLE_VALUE
          • DBMS_STATS
            • Overview
            • ALTER_STATS_HISTORY_RETENTION
            • CREATE_STAT_TABLE
            • DELETE_COLUMN_STATS
            • DELETE_INDEX_STATS
            • DELETE_TABLE_STATS
            • DELETE_SCHEMA_STATS
            • DELETE_SCHEMA_PREFS
            • DELETE_SYSTEM_STATS
            • DELETE_TABLE_PREFS
            • DROP_STAT_TABLE
            • EXPORT_COLUMN_STATS
            • EXPORT_INDEX_STATS
            • EXPORT_TABLE_STATS
            • EXPORT_SCHEMA_STATS
            • FLUSH_DATABASE_MONITORING_INFO
            • GATHER_INDEX_STATS
            • GATHER_TABLE_STATS
            • GATHER_SCHEMA_STATS
            • GATHER_SYSTEM_STATS
            • GET_STATS_HISTORY_AVAILABILITY
            • GET_STATS_HISTORY_RETENTION
            • GET_PARAM
            • GET_PREFS
            • IMPORT_INDEX_STATS
            • IMPORT_COLUMN_STATS
            • IMPORT_TABLE_STATS
            • IMPORT_SCHEMA_STATS
            • LOCK_PARTITION_STATS
            • LOCK_SCHEMA_STATS
            • LOCK_TABLE_STATS
            • RESTORE_TABLE_STATS
            • RESTORE_SCHEMA_STATS
            • RESET_GLOBAL_PREF_DEFAULTS
            • RESET_PARAM_DEFAULTS
            • PURGE_STATS
            • SET_COLUMN_STATS
            • SET_INDEX_STATS
            • SET_TABLE_STATS
            • SET_GLOBAL_PREFS
            • SET_PARAM
            • SET_SCHEMA_PREFS
            • SET_SYSTEM_STATS
            • SET_TABLE_PREFS
            • UNLOCK_PARTITION_STATS
            • UNLOCK_SCHEMA_STATS
            • UNLOCK_TABLE_STATS
            • COPY_TABLE_STATS
            • CANCEL_GATHER_STATS
          • DBMS_UDR
            • Overview
            • CREATE_RULE
            • DISABLE_RULE
            • ENABLE_RULE
            • REMOVE_RULE
          • DBMS_UTILITY
            • Overview of DBMS_UTILITY
            • ACTIVE_INSTANCES
            • CURRENT_INSTANCE
            • DB_VERSION
            • FORMAT_CALL_STACK
            • FORMAT_ERROR_BACKTRACE
            • FORMAT_ERROR_STACK
            • GET_ENDIANNESS
            • GET_HASH_VALUE
            • GET_PARAMETER_VALUE
            • GET_SQL_HASH
            • GET_TIME
            • IS_BIT_SET
            • IS_CLUSTER_DATABASE
            • NAME_RESOLVE
            • NAME_TOKENIZE
            • OLD_CURRENT_SCHEMA
            • OLD_CURRENT_USER
            • PORT_STRING
            • TABLE_TO_COMMA
            • COMMA_TO_TABLE
            • VALIDATE
          • DBMS_WORKLOAD_REPOSITORY
            • Overview
            • ASH_REPORT
          • DBMS_XA
            • Overview
            • DBMS_XA constants
            • DBMS_XA_XID object type
            • DIST_TXN_SYNC
            • XA_COMMIT
            • XA_END
            • XA_FORGET
            • XA_GETLASTOER
            • XA_PREPARE
            • XA_RECOVER
            • XA_ROLLBACK
            • XA_SETTIMEOUT
            • XA_START
          • DBMS_XMLGEN
            • Overview
            • CONVERT
          • DBMS_PROFILER
            • Overview of DBMS_PROFILER
            • START_PROFILER
            • STOP_PROFILER
            • PAUSE_PROFILER
            • RESUME_PROFILER
            • FLUSH_DATA
            • GET_VERSION
            • INTERNAL_VERSION_CHECK
            • ROLLUP_UNIT
            • ROLLUP_RUN
            • OB_INIT_OBJECTS
            • OB_DROP_OBJECTS
          • DBMS_XPLAN
            • Overview
            • DISPLAY_ACTIVE_SESSION_PLAN
            • DISPLAY_CURSOR
            • DISPLAY
            • DISABLE_OPT_TRACE
            • DISPLAY_SQL_PLAN_BASELINE
            • ENABLE_OPT_TRACE
            • SET_OPT_TRACE_PARAMETER
          • DBMS_EXTERNAL_TABLE
            • Overview
            • AUTO_REFRESH_EXTERNAL_TABLE
          • DBMS_DDL
            • Overview of DBMS_DDL
            • WRAP
            • CREATE_WRAPPED
          • ODCIConst
            • Overview
            • ODCIArgDesc.ArgType
            • ODCIEnv.CallProperty
            • ODCIEnv.Envflags
            • ODCIIndexAlter
            • ODCIIndexAlter parameter alter_option
            • ODCIIndexInfo.IndexInfoFlags
            • ODCIIndexInfo.IndexParaDegree
            • ODCIPredInfo.Flags
            • ODCIQueryInfo.Flags
            • ODCIStatsOptions.Flags
            • ODCIStatsOptions.Options
            • Return Status
            • ScnFlg
          • UTL_ENCODE
            • Overview
            • BASE64_DECODE
            • BASE64_ENCODE
          • UTL_FILE
            • Overview
            • FCLOSE
            • FFLUSH
            • FOPEN
            • FGETPOS
            • FREMOVE
            • FRENAME
            • FSEEK
            • NEW_LINE
            • GET_LINE
            • PUT
            • PUT_LINE
          • UTL_I18N
            • Overview
            • RAW_TO_CHAR
            • STRING_TO_RAW
          • UTL_RECOMP
            • Overview
            • RECOMP_PARALLEL
            • RECOMP_SERIAL
            • TRUNCATE_UTL_RECOMP_SKIP_LIST
            • POPULATE_UTL_RECOMP_SKIP_LIST
            • PARALLEL_SLAVE
          • UTL_RAW
            • Overview of UTL_RAW
            • BIT_AND
            • BIT_COMPLEMENT
            • BIT_OR
            • BIT_XOR
            • CAST_FROM_BINARY_DOUBLE
            • CAST_FROM_BINARY_FLOAT
            • CAST_FROM_BINARY_INTEGER
            • CAST_FROM_NUMBER
            • CAST_TO_BINARY_DOUBLE
            • CAST_TO_BINARY_FLOAT
            • CAST_TO_BINARY_INTEGER
            • CAST_TO_NUMBER
            • CAST_TO_RAW
            • CAST_TO_VARCHAR2
            • COMPARE
            • CONCAT
            • COPIES
            • LENGTH
            • REVERSE
            • SUBSTR
            • TRANSLATE
          • UTL_TCP
            • Overview of UTL_TCP
            • OPEN_CONNECTION
            • CLOSE_CONNECTION
            • CLOSE_ALL_CONNECTIONS
            • WRITE_LINE
            • WRITE_TEXT
            • WRITE_RAW
            • GET_LINE
            • GET_TEXT
          • UTL_SMTP
            • Overview of UTL_SMTP
            • OPEN_CONNECTION
            • CLOSE_CONNECTION
            • QUIT
            • AUTH
            • COMMAND
            • COMMAND_REPLIES
            • HELO
            • EHLO
            • MAIL
            • RCPT
            • OPEN_DATA
            • WRITE_DATA
            • WRITE_RAW_DATA
            • CLOSE_DATA
            • DATA
            • VRFY
            • HELP
            • NOOP
            • RSET
          • ANYDATA TYPE
            • Overview of ANYDATA type
            • BEGINCREATE static procedure
            • ENDCREATE member procedure
            • GET* member functions
            • GETTYPE member function
            • GETTYPENAME member function
            • PIECEWISE member procedure
            • SET* member procedures
          • XMLType
            • Overview of XMLType
            • CREATEXML
            • GETCLOBVAL
            • GETSTRINGVAL
            • TRANSFORM
            • XMLTYPE
            • EXISTSNODE
            • EXTRACT
        • Reserved PL keywords
    • System views
      • System views overview
      • System views overview
      • Views in OceanBase Database V3.x and V4.x
      • SYS tenant views
        • Dictionary views
          • information_schema.CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS
          • information_schema.CHARACTER_SETS
          • information_schema.CHECK_CONSTRAINTS
          • information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
          • information_schema.COLLATIONS
          • information_schema.COLUMN_PRIVILEGES
          • information_schema.COLUMNS
          • information_schema.ENGINES
          • information_schema.events
          • information_schema.GLOBAL_STATUS
          • information_schema.GLOBAL_VARIABLES
          • information_schema.KEY_COLUMN_USAGE
          • information_schema.PARAMETERS
          • information_schema.PARTITIONS
          • information_schema.PROCESSLIST
          • information_schema.QUERY_RESPONSE_TIME
          • information_schema.REFERENTIAL_CONSTRAINTS
          • information_schema.role_table_grants
          • information_schema.role_column_grants
          • information_schema.role_routine_grants
          • information_schema.ROUTINES
          • information_schema.SCHEMA_PRIVILEGES
          • information_schema.SCHEMATA
          • information_schema.SESSION_STATUS
          • information_schema.SESSION_VARIABLES
          • information_schema.STATISTICS
          • information_schema.TABLE_CONSTRAINTS
          • information_schema.TABLE_PRIVILEGES
          • information_schema.TABLES
          • information_schema.USER_PRIVILEGES
          • information_schema.VIEW_TABLE_USAGE
          • information_schema.VIEWS
          • mysql.columns_priv
          • mysql.db
          • mysql.default_roles
          • mysql.help_category
          • mysql.help_keyword
          • mysql.help_relation
          • mysql.help_topic
          • mysql.proc
          • mysql.procs_priv
          • mysql.role_edges
          • mysql.time_zone
          • mysql.time_zone_name
          • mysql.time_zone_transition
          • mysql.time_zone_transition_type
          • mysql.user
          • oceanbase.ALL_OB_EXTERNAL_TABLE_FILES
          • oceanbase.CDB_CKPT_HISTORY
          • oceanbase.CDB_OB_DATABASE_PRIVILEGE
          • oceanbase.CDB_IND_COLUMNS
          • oceanbase.CDB_IND_PARTITIONS
          • oceanbase.CDB_IND_SUBPARTITIONS
          • CDB_INDEX_USAGE
          • oceanbase.CDB_INDEXES
          • CDB_MVIEW_LOGS
          • oceanbase.CDB_MVIEW_RUNNING_JOBS
          • CDB_MVIEWS
          • CDB_MVREF_CHANGE_STATS
          • CDB_MVREF_RUN_STATS
          • CDB_MVREF_STATS
          • CDB_MVREF_STATS_PARAMS
          • CDB_MVREF_STATS_SYS_DEFAULTS
          • CDB_MVREF_STMT_STATS
          • oceanbase.CDB_OB_ACCESS_POINT
          • oceanbase.CDB_OB_LS_ARB_REPLICA_TASKS
          • oceanbase.CDB_OB_ARCHIVE_DEST
          • oceanbase.CDB_OB_ARCHIVELOG
          • oceanbase.CDB_OB_ARCHIVELOG_PIECE_FILES
          • oceanbase.CDB_OB_ARCHIVELOG_SUMMARY
          • oceanbase.CDB_OB_AUTO_INCREMENT
          • CDB_OB_AUX_STATISTICS
          • oceanbase.CDB_OB_BACKUP_DELETE_JOB_HISTORY
          • oceanbase.CDB_OB_BACKUP_DELETE_JOBS
          • oceanbase.CDB_OB_BACKUP_DELETE_POLICY
          • oceanbase.CDB_OB_BACKUP_DELETE_TASK_HISTORY
          • oceanbase.CDB_OB_BACKUP_DELETE_TASKS
          • oceanbase.CDB_OB_BACKUP_JOB_HISTORY
          • oceanbase.CDB_OB_BACKUP_JOBS
          • oceanbase.CDB_OB_BACKUP_PARAMETER
          • oceanbase.CDB_OB_BACKUP_SET_FILES
          • oceanbase.CDB_OB_BACKUP_STORAGE_INFO
          • oceanbase.CDB_OB_BACKUP_STORAGE_INFO_HISTORY
          • oceanbase.CDB_OB_BACKUP_TASK_HISTORY
          • oceanbase.CDB_OB_BACKUP_TASKS
          • oceanbase.CDB_OB_BALANCE_JOB_HISTORY
          • oceanbase.CDB_OB_BALANCE_JOBS
          • oceanbase.CDB_OB_BALANCE_TASK_HISTORY
          • oceanbase.CDB_OB_BALANCE_TASKS
          • oceanbase.CDB_OB_COLUMN_CHECKSUM_ERROR_INFO
          • oceanbase.CDB_OB_CCL_RULES
          • oceanbase.CDB_OB_CS_REPLICA_STATS
          • oceanbase.CDB_OB_DATA_DICTIONARY_IN_LOG
          • oceanbase.CDB_OB_DATABASES
          • oceanbase.CDB_OB_DEADLOCK_EVENT_HISTORY
          • oceanbase.CDB_OB_DYNAMIC_PARTITION_TABLES
          • oceanbase.CDB_OB_EXTERNAL_TABLE_FILES
          • oceanbase.CDB_OB_FREEZE_INFO
          • oceanbase.CDB_OB_IMPORT_TABLE_JOB_HISTORY
          • oceanbase.CDB_OB_IMPORT_TABLE_JOBS
          • oceanbase.CDB_OB_IMPORT_TABLE_TASK_HISTORY
          • oceanbase.CDB_OB_IMPORT_TABLE_TASKS
          • oceanbase.CDB_OB_KV_REDIS_TABLE
          • oceanbase.CDB_OB_KV_TTL_TASK_HISTORY
          • oceanbase.CDB_OB_KV_TTL_TASKS
          • oceanbase.CDB_OB_LOG_RESTORE_SOURCE
          • oceanbase.CDB_OB_LS
          • oceanbase.CDB_OB_LS_ARB_REPLICA_TASK_HISTORY
          • oceanbase.CDB_OB_LS_HISTORY
          • oceanbase.CDB_OB_LS_LOCATIONS
          • oceanbase.CDB_OB_LS_LOG_ARCHIVE_PROGRESS
          • oceanbase.CDB_OB_LS_REPLICA_TASKS
          • oceanbase.CDB_OB_LS_REPLICA_TASK_HISTORY
          • oceanbase.CDB_OB_MAJOR_COMPACTION
          • oceanbase.CDB_OB_RECOVER_TABLE_JOB_HISTORY
          • oceanbase.CDB_OB_RECOVER_TABLE_JOBS
          • oceanbase.CDB_OB_SERVICES
          • oceanbase.CDB_OB_RESTORE_HISTORY
          • oceanbase.CDB_OB_RESTORE_PROGRESS
          • oceanbase.CDB_OB_RSRC_DIRECTIVES
          • oceanbase.CDB_OB_SENSITIVE_COLUMNS
          • oceanbase.CDB_OB_SENSITIVE_RULE_PLAINACCESS_USERS
          • oceanbase.CDB_OB_SENSITIVE_RULES
          • oceanbase.CDB_OB_SERVER_SPACE_USAGE
          • oceanbase.CDB_OB_SPACE_USAGE
          • oceanbase.CDB_OB_SYS_VARIABLES
          • oceanbase.CDB_OB_STORAGE_IO_USAGE
          • oceanbase.CDB_OB_TABLE_LOCATIONS
          • oceanbase.CDB_OB_TABLEGROUP_PARTITIONS
          • oceanbase.CDB_OB_TABLEGROUP_SUBPARTITIONS
          • oceanbase.CDB_OB_TABLEGROUP_TABLES
          • oceanbase.CDB_OB_TABLEGROUPS
          • oceanbase.CDB_OB_TABLET_CHECKSUM_ERROR_INFO
          • oceanbase.CDB_OB_TABLET_REPLICAS
          • oceanbase.CDB_OB_TABLET_TO_LS
          • oceanbase.CDB_OB_TABLE_SPACE_USAGE
          • oceanbase.CDB_OB_TEMP_FILES
          • oceanbase.CDB_OB_TENANT_EVENT_HISTORY
          • oceanbase.CDB_OB_TRANSFER_PARTITION_TASKS
          • oceanbase.CDB_OB_TRANSFER_PARTITION_TASK_HISTORY
          • oceanbase.CDB_OB_TRANSFER_TASK_HISTORY
          • oceanbase.CDB_OB_TRANSFER_TASKS
          • oceanbase.CDB_OB_USERS
          • oceanbase.CDB_OB_VECTOR_INDEX_TASKS
          • oceanbase.CDB_OB_VECTOR_INDEX_TASK_HISTORY
          • oceanbase.CDB_OB_ZONE_MAJOR_COMPACTION
          • oceanbase.CDB_OBJECTS
          • oceanbase.CDB_PART_INDEXES
          • oceanbase.CDB_PART_KEY_COLUMNS
          • oceanbase.CDB_PART_TABLES
          • oceanbase.CDB_SCHEDULER_JOB_RUN_DETAILS
          • oceanbase.CDB_SUBPART_KEY_COLUMNS
          • oceanbase.CDB_SUBPARTITION_TEMPLATES
          • oceanbase.CDB_TAB_COL_STATISTICS
          • oceanbase.CDB_TAB_COLS
          • oceanbase.CDB_TAB_COLS_V$
          • oceanbase.CDB_TAB_PARTITIONS
          • oceanbase.CDB_TAB_SUBPARTITIONS
          • oceanbase.CDB_TABLES
          • oceanbase.CDB_WR_ACTIVE_SESSION_HISTORY
          • oceanbase.CDB_WR_CONTROL
          • oceanbase.CDB_WR_EVENT_NAME
          • oceanbase.CDB_WR_SNAPSHOT
          • oceanbase.CDB_WR_SQLSTAT
          • oceanbase.CDB_WR_SQLTEXT
          • oceanbase.CDB_WR_STATNAME
          • oceanbase.CDB_WR_SYS_TIME_MODEL
          • oceanbase.CDB_WR_SYSSTAT
          • oceanbase.CDB_WR_SYSTEM_EVENT
          • oceanbase.DBA_DB_LINKS
          • oceanbase.DBA_IND_PARTITIONS
          • oceanbase.DBA_IND_STATISTICS
          • oceanbase.DBA_IND_SUBPARTITIONS
          • oceanbase.DBA_INDEX_USAGE
          • oceanbase.DBA_MVIEW_DEPS
          • oceanbase.DBA_MVIEW_LOGS
          • oceanbase.DBA_MVIEW_RUNNING_JOBS
          • oceanbase.DBA_MVIEWS
          • DBA_MVREF_CHANGE_STATS
          • oceanbase.DBA_MVREF_RUN_STATS
          • oceanbase.DBA_MVREF_STATS
          • oceanbase.DBA_MVREF_STATS_PARAMS
          • oceanbase.DBA_MVREF_STATS_SYS_DEFAULTS
          • oceanbase.DBA_MVREF_STMT_STATS
          • oceanbase.DBA_OB_ACCESS_POINT
          • oceanbase.DBA_OB_ARBITRATION_SERVICE
          • oceanbase.DBA_OB_ARCHIVE_DEST
          • oceanbase.DBA_OB_ARCHIVELOG
          • oceanbase.DBA_OB_ARCHIVELOG_PIECE_FILES
          • oceanbase.DBA_OB_ARCHIVELOG_SUMMARY
          • oceanbase.DBA_OB_AUTO_INCREMENT
          • DBA_OB_AUX_STATISTICS
          • oceanbase.DBA_OB_BACKUP_DELETE_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_JOBS
          • oceanbase.DBA_OB_BACKUP_DELETE_POLICY
          • oceanbase.DBA_OB_BACKUP_DELETE_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_TASKS
          • oceanbase.DBA_OB_BACKUP_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_JOBS
          • oceanbase.DBA_OB_BACKUP_PARAMETER
          • oceanbase.DBA_OB_BACKUP_SET_FILES
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO_HISTORY
          • oceanbase.DBA_OB_BACKUP_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_TASKS
          • oceanbase.DBA_OB_BALANCE_JOB_HISTORY
          • oceanbase.DBA_OB_BALANCE_JOBS
          • oceanbase.DBA_OB_BALANCE_TASK_HISTORY
          • oceanbase.DBA_OB_BALANCE_TASKS
          • oceanbase.DBA_OB_CLONE_HISTORY
          • oceanbase.DBA_OB_CLONE_PROGRESS
          • oceanbase.DBA_OB_CLUSTER_EVENT_HISTORY
          • oceanbase.DBA_OB_CONCURRENT_LIMIT_SQL
          • oceanbase.DBA_OB_CCL_RULES
          • oceanbase.DBA_OB_CS_REPLICA_STATS
          • oceanbase.DBA_OB_DATA_DICTIONARY_IN_LOG
          • oceanbase.DBA_OB_DATABASE_PRIVILEGE
          • oceanbase.DBA_OB_DATABASES
          • oceanbase.DBA_OB_DEADLOCK_EVENT_HISTORY
          • oceanbase.DBA_OB_DYNAMIC_PARTITION_TABLES
          • oceanbase.DBA_OB_EXTERNAL_TABLE_FILES
          • DBA_OB_FORMAT_OUTLINES
          • oceanbase.DBA_OB_FREEZE_INFO
          • oceanbase.DBA_OB_IMPORT_TABLE_JOB_HISTORY
          • oceanbase.DBA_OB_IMPORT_TABLE_JOBS
          • oceanbase.DBA_OB_IMPORT_TABLE_TASK_HISTORY
          • oceanbase.DBA_OB_IMPORT_TABLE_TASKS
          • oceanbase.DBA_OB_KV_TTL_TASK_HISTORY
          • oceanbase.DBA_OB_KV_TTL_TASKS
          • oceanbase.DBA_OB_LOG_RESTORE_SOURCE
          • oceanbase.DBA_OB_LS
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASKS
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASK_HISTORY
          • oceanbase.DBA_OB_LS_HISTORY
          • oceanbase.DBA_OB_LS_LOCATIONS
          • oceanbase.DBA_OB_LS_LOG_ARCHIVE_PROGRESS
          • oceanbase.DBA_OB_LS_REPLICA_TASKS
          • oceanbase.DBA_OB_LS_REPLICA_TASK_HISTORY
          • oceanbase.DBA_OB_MAJOR_COMPACTION
          • oceanbase.DBA_OB_OUTLINE_CONCURRENT_HISTORY
          • oceanbase.DBA_OB_OUTLINES
          • oceanbase.DBA_OB_RECOVER_TABLE_JOB_HISTORY
          • oceanbase.DBA_OB_SERVICES
          • oceanbase.DBA_OB_RECOVER_TABLE_JOBS
          • oceanbase.DBA_OB_RESOURCE_POOLS
          • oceanbase.DBA_OB_RESTORE_HISTORY
          • oceanbase.DBA_OB_RESTORE_PROGRESS
          • oceanbase.DBA_OB_ROOTSERVICE_EVENT_HISTORY
          • oceanbase.DBA_OB_RSRC_IO_DIRECTIVES
          • oceanbase.DBA_OB_RSRC_DIRECTIVES
          • oceanbase.DBA_OB_SEQUENCE_OBJECTS
          • oceanbase.DBA_OB_SERVER_EVENT_HISTORY
          • oceanbase.DBA_OB_SERVER_JOBS
          • oceanbase.DBA_OB_SERVERS
          • oceanbase.DBA_OB_STORAGE_IO_USAGE
          • oceanbase.DBA_OB_SYS_VARIABLES
          • oceanbase.DBA_OB_TABLE_LOCATIONS
          • oceanbase.DBA_OB_TABLE_OPT_STAT_GATHER_HISTORY
          • oceanbase.DBA_OB_TABLE_STAT_STALE_INFO
          • oceanbase.DBA_OB_TABLEGROUP_PARTITIONS
          • oceanbase.DBA_OB_TABLEGROUP_SUBPARTITIONS
          • oceanbase.DBA_OB_TABLEGROUP_TABLES
          • oceanbase.DBA_OB_TABLEGROUPS
          • oceanbase.DBA_OB_TABLET_REPLICAS
          • oceanbase.DBA_OB_TABLET_TO_LS
          • oceanbase.DBA_OB_TASK_OPT_STAT_GATHER_HISTORY
          • oceanbase.DBA_OB_TEMP_FILES
          • oceanbase.DBA_OB_TENANT_EVENT_HISTORY
          • oceanbase.DBA_OB_TENANT_JOBS
          • oceanbase.DBA_OB_TENANTS
          • oceanbase.DBA_OB_TRANSFER_PARTITION_TASKS
          • oceanbase.DBA_OB_TRANSFER_PARTITION_TASK_HISTORY
          • oceanbase.DBA_OB_TRANSFER_TASK_HISTORY
          • oceanbase.DBA_OB_TRANSFER_TASKS
          • DBA_OB_TRUSTED_ROOT_CERTIFICATE
          • oceanbase.DBA_OB_UNIT_CONFIGS
          • oceanbase.DBA_OB_UNIT_JOBS
          • oceanbase.DBA_OB_UNITS
          • oceanbase.DBA_OB_USER_DEFINED_RULES
          • oceanbase.DBA_OB_USERS
          • oceanbase.DBA_OB_VECTOR_INDEX_TASKS
          • oceanbase.DBA_OB_VECTOR_INDEX_TASK_HISTORY
          • oceanbase.DBA_OB_ZONE_MAJOR_COMPACTION
          • oceanbase.DBA_OB_ZONES
          • oceanbase.DBA_OB_ZONE_STORAGE
          • oceanbase.DBA_OBJECTS
          • oceanbase.DBA_PART_COL_STATISTICS
          • oceanbase.DBA_PART_HISTOGRAMS
          • oceanbase.DBA_PART_INDEXES
          • oceanbase.DBA_PART_KEY_COLUMNS
          • oceanbase.DBA_PART_TABLES
          • oceanbase.DBA_RECYCLEBIN
          • oceanbase.DBA_RSRC_CONSUMER_GROUPS
          • oceanbase.DBA_RSRC_GROUP_MAPPINGS
          • oceanbase.DBA_RSRC_PLAN_DIRECTIVES
          • oceanbase.DBA_RSRC_PLANS
          • oceanbase.DBA_SCHEDULER_JOBS
          • oceanbase.DBA_SCHEDULER_JOB_RUN_DETAILS
          • oceanbase.DBA_SCHEDULER_WINDOWS
          • oceanbase.DBA_SEQUENCES
          • oceanbase.DBA_SQL_MANAGEMENT_CONFIG
          • oceanbase.DBA_SQL_PLAN_BASELINES
          • oceanbase.DBA_SUBPART_COL_STATISTICS
          • oceanbase.DBA_SUBPART_HISTOGRAMS
          • oceanbase.DBA_SUBPART_KEY_COLUMNS
          • oceanbase.DBA_SUBPARTITION_TEMPLATES
          • oceanbase.DBA_TAB_COL_STATISTICS
          • oceanbase.DBA_TAB_HISTOGRAMS
          • oceanbase.DBA_TAB_MODIFICATIONS
          • oceanbase.DBA_TAB_PARTITIONS
          • oceanbase.DBA_TAB_STATISTICS
          • oceanbase.DBA_TAB_STATS_HISTORY
          • oceanbase.DBA_TAB_SUBPARTITIONS
          • oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY
          • oceanbase.DBA_WR_CONTROL
          • oceanbase.DBA_WR_EVENT_NAME
          • oceanbase.DBA_WR_SNAPSHOT
          • oceanbase.DBA_WR_SQLSTAT
          • oceanbase.DBA_WR_SQLTEXT
          • oceanbase.DBA_WR_STATNAME
          • oceanbase.DBA_WR_SYS_TIME_MODEL
          • oceanbase.DBA_WR_SYSSTAT
          • oceanbase.DBA_WR_SYSTEM_EVENT
          • oceanbase.DBA_OB_LICENSE
        • Performance views
          • GV$ACTIVE_SESSION_HISTORY
          • GV$DML_STATS
          • GV$LATCH
          • GV$OB_ACTIVE_SESSION_HISTORY
          • GV$OB_COMPACTION_DIAGNOSE_INFO
          • GV$OB_COMPACTION_PROGRESS
          • GV$OB_COMPACTION_SUGGESTIONS
          • GV$OB_CGROUP_CONFIG
          • GV$OB_DTL_INTERM_RESULT_MONITOR
          • GV$OB_FLT_TRACE_CONFIG
          • GV$OB_FUNCTION_IO_STAT
          • GV$OB_GROUP_IO_STAT
          • GV$OB_IO_BENCHMARK
          • GV$OB_IO_CALIBRATION_STATUS
          • GV$OB_KVCACHE
          • GV$OB_KV_GROUP_COMMIT_STATUS
          • GV$OB_LOG_STAT
          • GV$OB_LOG_TRANSPORT_DEST_STAT
          • GV$OB_LS_SNAPSHOTS
          • GV$OB_MEMORY
          • GV$OB_MEMSTORE
          • GV$OB_MEMSTORE_INFO
          • GV$OB_MERGE_INFO
          • GV$OB_NIC_INFO
          • GV$OB_RPC_INCOMING
          • GV$OB_RPC_OUTGOING
          • GV$OB_PARAMETERS
          • GV$OB_PLAN_CACHE_PLAN_EXPLAIN
          • GV$OB_PLAN_CACHE_PLAN_STAT
          • GV$OB_PLAN_CACHE_STAT
          • GV$OB_PROCESSLIST
          • GV$OB_PS_ITEM_INFO
          • GV$OB_PS_STAT
          • GV$OB_PX_P2P_DATAHUB
          • GV$OB_PX_TARGET_MONITOR
          • GV$OB_PX_WORKER_STAT
          • GV$OB_QUERY_RESPONSE_TIME_HISTOGRAM
          • GV$OB_RES_MGR_SYSSTAT
          • GV$OB_SERVER_SCHEMA_INFO
          • GV$OB_SERVERS
          • GV$OB_SERVER_STORAGE
          • GV$OB_SESS_TIME_MODEL
          • GV$OB_SESSION
          • GV$OB_SHARED_STORAGE_QUOTA
          • GV$OB_SQL_AUDIT
          • GV$OB_SQL_CCL_STATUS
          • GV$SQL_JOIN_FILTER
          • GV$OB_SQL_PLAN
          • GV$SQL_PLAN_MONITOR
          • GV$OB_SQL_WORKAREA_MEMORY_INFO
          • GV$OB_SQLSTAT
          • GV$OB_SSTABLES
          • GV$OB_SS_LOCAL_CACHE
          • GV$OB_STORAGE_CACHE_TASKS
          • GV$OB_SYS_TIME_MODEL
          • GV$OB_TABLET_COMPACTION_HISTORY
          • GV$OB_TABLET_COMPACTION_PROGRESS
          • GV$OB_TABLET_LOCAL_CACHE
          • GV$OB_TENANT_MEMORY
          • GV$OB_TENANT_RESOURCE_LIMIT
          • GV$OB_TENANT_RESOURCE_LIMIT_DETAIL
          • GV$OB_TENANT_RUNTIME_INFO
          • GV$OB_TRANSACTION_PARTICIPANTS
          • GV$OB_TRANSACTION_SCHEDULERS
          • GV$OB_UNITS
          • GV$OB_VECTOR_MEMORY
          • GV$SESSION_EVENT
          • GV$SESSION_LONGOPS
          • GV$SESSION_WAIT
          • GV$SESSION_WAIT_HISTORY
          • GV$SESSTAT
          • GV$SQL_WORKAREA
          • GV$SQL_WORKAREA_ACTIVE
          • GV$SQL_WORKAREA_HISTOGRAM
          • GV$SYSSTAT
          • GV$SYSTEM_EVENT
          • gv$tenant
          • gv$tenant_memstore_allocator_info
          • GV$OB_ARBITRATION_MEMBER_INFO
          • GV$OB_ARBITRATION_SERVICE_STATUS
          • GV$OB_KV_CLIENT_INFO
          • GV$OB_LOCKS
          • GV$OB_OPT_STAT_GATHER_MONITOR
          • GV$OB_THREAD
          • GV$OB_PL_CACHE_OBJECT
          • GV$UNIT
          • GV$VECTOR_MEMORY
          • V$OB_PL_CACHE_OBJECT
          • V$ACTIVE_SESSION_HISTORY
          • V$DML_STATS
          • V$ENCRYPTED_TABLESPACES
          • V$EVENT_NAME
          • V$LATCH
          • V$OB_ACTIVE_SESSION_HISTORY
          • V$OB_ARCHIVE_DEST_STATUS
          • V$OB_COMPACTION_DIAGNOSE_INFO
          • V$OB_COMPACTION_PROGRESS
          • V$OB_COMPACTION_SUGGESTIONS
          • V$OB_COMPATIBILITY_CONTROL
          • V$OB_CGROUP_CONFIG
          • V$OB_DTL_INTERM_RESULT_MONITOR
          • V$OB_DYNAMIC_PARTITION_TABLES
          • V$OB_ENCRYPTED_TABLES
          • V$OB_FUNCTION_IO_STAT
          • V$OB_GROUP_IO_STAT
          • V$OB_IO_BENCHMARK
          • V$OB_IO_CALIBRATION_STATUS
          • V$OB_KVCACHE
          • V$OB_KV_CLIENT_INFO
          • V$OB_KV_GROUP_COMMIT_STATUS
          • V$OB_LOG_STAT
          • V$OB_LOG_TRANSPORT_DEST_STAT
          • V$OB_LS_LOG_RESTORE_STATUS
          • V$OB_LS_REPLICA_TASK_PLAN
          • V$OB_LS_SNAPSHOTS
          • V$OB_MEMORY
          • V$OB_MEMSTORE
          • V$OB_MEMSTORE_INFO
          • V$OB_MERGE_INFO
          • V$OB_NIC_INFO
          • V$OB_RPC_INCOMING
          • V$OB_RPC_OUTGOING
          • V$OB_PARAMETERS
          • V$OB_PLAN_CACHE_PLAN_EXPLAIN
          • V$OB_PLAN_CACHE_PLAN_STAT
          • V$OB_PLAN_CACHE_STAT
          • V$OB_PROCESSLIST
          • V$OB_PS_ITEM_INFO
          • V$OB_PS_STAT
          • V$OB_PX_P2P_DATAHUB
          • V$OB_PX_TARGET_MONITOR
          • V$OB_PX_WORKER_STAT
          • V$OB_QUERY_RESPONSE_TIME_HISTOGRAM
          • V$OB_RES_MGR_SYSSTAT
          • V$OB_SERVER_SCHEMA_INFO
          • V$OB_SERVERS
          • V$OB_SERVER_STORAGE
          • V$OB_SESS_TIME_MODEL
          • V$OB_SESSION
          • V$SESSION_EVENT
          • V$OB_SHARED_STORAGE_QUOTA
          • V$OB_SQL_AUDIT
          • V$OB_SQL_CCL_STATUS
          • V$SQL_JOIN_FILTER
          • V$OB_SQL_PLAN
          • V$OB_SQL_WORKAREA_MEMORY_INFO
          • V$OB_SQLSTAT
          • V$OB_SSTABLES
          • V$OB_SS_LOCAL_CACHE
          • V$OB_STORAGE_CACHE_TASKS
          • V$OB_SYS_TIME_MODEL
          • V$OB_TABLET_COMPACTION_HISTORY
          • V$OB_TABLET_COMPACTION_PROGRESS
          • V$OB_TABLET_LOCAL_CACHE
          • V$OB_TENANT_MEMORY
          • V$OB_TENANT_RESOURCE_LIMIT
          • V$OB_TENANT_RESOURCE_LIMIT_DETAIL
          • V$OB_TENANT_RUNTIME_INFO
          • V$OB_TIMESTAMP_SERVICE
          • V$OB_TRANSACTION_PARTICIPANTS
          • V$OB_TRANSACTION_SCHEDULERS
          • V$OB_UNITS
          • V$RESTORE_POINT
          • V$RSRC_PLAN
          • V$SESSION_LONGOPS
          • V$SESSION_WAIT
          • V$SESSION_WAIT_HISTORY
          • V$SESSTAT
          • V$SQL_MONITOR_STATNAME
          • V$SQL_PLAN_MONITOR
          • V$SQL_WORKAREA
          • V$SQL_WORKAREA_ACTIVE
          • V$SQL_WORKAREA_HISTOGRAM
          • V$STATNAME
          • V$SYSSTAT
          • V$SYSTEM_EVENT
          • V$OB_ARBITRATION_MEMBER_INFO
          • V$OB_ARBITRATION_SERVICE_STATUS
          • V$OB_LOCKS
          • V$OB_OPT_STAT_GATHER_MONITOR
          • V$OB_THREAD
          • V$OB_VECTOR_MEMORY
          • v$tenant_memstore_allocator_info
          • V$UNIT
          • V$VECTOR_MEMORY
      • MySQL tenant views
        • Dictionary views
          • information_schema.CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS
          • information_schema.CHARACTER_SETS
          • information_schema.CHECK_CONSTRAINTS
          • information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
          • information_schema.COLLATIONS
          • information_schema.COLUMN_PRIVILEGES
          • information_schema.COLUMNS
          • information_schema.ENGINES
          • information_schema.events
          • information_schema.GLOBAL_STATUS
          • information_schema.GLOBAL_VARIABLES
          • information_schema.KEY_COLUMN_USAGE
          • information_schema.PARAMETERS
          • information_schema.PARTITIONS
          • information_schema.PROCESSLIST
          • information_schema.QUERY_RESPONSE_TIME
          • information_schema.REFERENTIAL_CONSTRAINTS
          • information_schema.role_table_grants
          • information_schema.role_column_grants
          • information_schema.role_routine_grants
          • information_schema.ROUTINES
          • information_schema.SCHEMA_PRIVILEGES
          • information_schema.SCHEMATA
          • information_schema.SESSION_STATUS
          • information_schema.SESSION_VARIABLES
          • information_schema.ST_GEOMETRY_COLUMNS
          • information_schema.ST_SPATIAL_REFERENCE_SYSTEMS
          • information_schema.STATISTICS
          • information_schema.TABLE_CONSTRAINTS
          • information_schema.TABLE_PRIVILEGES
          • information_schema.TABLES
          • information_schema.USER_PRIVILEGES
          • information_schema.VIEW_TABLE_USAGE
          • information_schema.VIEWS
          • mysql.audit_log_filter
          • mysql.audit_log_user
          • mysql.columns_priv
          • mysql.db
          • mysql.default_roles
          • mysql.help_category
          • mysql.help_keyword
          • mysql.help_relation
          • mysql.help_topic
          • mysql.proc
          • mysql.procs_priv
          • mysql.role_edges
          • mysql.time_zone
          • mysql.time_zone_name
          • mysql.time_zone_transition
          • mysql.time_zone_transition_type
          • mysql.user
          • oceanbase.ALL_OB_EXTERNAL_TABLE_FILES
          • oceanbase.DBA_DB_LINKS
          • oceanbase.DBA_IND_PARTITIONS
          • oceanbase.DBA_IND_STATISTICS
          • oceanbase.DBA_IND_SUBPARTITIONS
          • oceanbase.DBA_INDEX_USAGE
          • oceanbase.DBA_MVIEW_DEPS
          • oceanbase.DBA_MVIEW_LOGS
          • oceanbase.DBA_MVIEW_RUNNING_JOBS
          • oceanbase.DBA_MVIEWS
          • DBA_MVREF_CHANGE_STATS
          • oceanbase.DBA_MVREF_RUN_STATS
          • oceanbase.DBA_MVREF_STATS
          • oceanbase.DBA_MVREF_STATS_PARAMS
          • oceanbase.DBA_MVREF_STATS_SYS_DEFAULTS
          • oceanbase.DBA_MVREF_STMT_STATS
          • oceanbase.DBA_OB_ACCESS_POINT
          • oceanbase.DBA_OB_ARCHIVE_DEST
          • oceanbase.DBA_OB_ARCHIVELOG
          • oceanbase.DBA_OB_ARCHIVELOG_PIECE_FILES
          • oceanbase.DBA_OB_ARCHIVELOG_SUMMARY
          • oceanbase.DBA_OB_AUTO_INCREMENT
          • DBA_OB_AUX_STATISTICS
          • oceanbase.DBA_OB_BACKUP_DELETE_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_JOBS
          • oceanbase.DBA_OB_BACKUP_DELETE_POLICY
          • oceanbase.DBA_OB_BACKUP_DELETE_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_TASKS
          • oceanbase.DBA_OB_BACKUP_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_JOBS
          • oceanbase.DBA_OB_BACKUP_PARAMETER
          • oceanbase.DBA_OB_BACKUP_SET_FILES
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO_HISTORY
          • oceanbase.DBA_OB_BACKUP_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_TASKS
          • oceanbase.DBA_OB_BALANCE_JOB_HISTORY
          • oceanbase.DBA_OB_BALANCE_JOBS
          • oceanbase.DBA_OB_BALANCE_TASK_HISTORY
          • oceanbase.DBA_OB_BALANCE_TASKS
          • oceanbase.DBA_OB_CONCURRENT_LIMIT_SQL
          • oceanbase.DBA_OB_CCL_RULES
          • oceanbase.DBA_OB_CS_REPLICA_STATS
          • oceanbase.DBA_OB_DATA_DICTIONARY_IN_LOG
          • oceanbase.DBA_OB_DATABASE_PRIVILEGE
          • oceanbase.DBA_OB_DATABASES
          • oceanbase.DBA_OB_DEADLOCK_EVENT_HISTORY
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          • oceanbase.DBA_OB_EXTERNAL_TABLE_FILES
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          • oceanbase.DBA_OB_FREEZE_INFO
          • oceanbase.DBA_OB_IMPORT_TABLE_JOB_HISTORY
          • oceanbase.DBA_OB_IMPORT_TABLE_JOBS
          • oceanbase.DBA_OB_IMPORT_TABLE_TASK_HISTORY
          • oceanbase.DBA_OB_IMPORT_TABLE_TASKS
          • oceanbase.DBA_OB_KV_REDIS_TABLE
          • oceanbase.DBA_OB_KV_TTL_TASK_HISTORY
          • oceanbase.DBA_OB_KV_TTL_TASKS
          • oceanbase.DBA_OB_LOG_RESTORE_SOURCE
          • oceanbase.DBA_OB_LS
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASKS
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASK_HISTORY
          • oceanbase.DBA_OB_LS_HISTORY
          • oceanbase.DBA_OB_LS_LOCATIONS
          • oceanbase.DBA_OB_LS_LOG_ARCHIVE_PROGRESS
          • oceanbase.DBA_OB_LS_REPLICA_TASKS
          • oceanbase.DBA_OB_LS_REPLICA_TASK_HISTORY
          • oceanbase.DBA_OB_MAJOR_COMPACTION
          • oceanbase.DBA_OB_OUTLINE_CONCURRENT_HISTORY
          • oceanbase.DBA_OB_OUTLINES
          • oceanbase.DBA_OB_RECOVER_TABLE_JOB_HISTORY
          • oceanbase.DBA_OB_RECOVER_TABLE_JOBS
          • oceanbase.DBA_OB_SERVICES
          • oceanbase.DBA_OB_RESTORE_HISTORY
          • oceanbase.DBA_OB_RESTORE_PROGRESS
          • oceanbase.DBA_OB_RSRC_IO_DIRECTIVES
          • oceanbase.DBA_OB_RSRC_DIRECTIVES
          • oceanbase.DBA_OB_SENSITIVE_COLUMNS
          • oceanbase.DBA_OB_SENSITIVE_RULE_PLAINACCESS_USERS
          • oceanbase.DBA_OB_SENSITIVE_RULES
          • oceanbase.DBA_OB_SEQUENCE_OBJECTS
          • oceanbase.DBA_OB_STORAGE_IO_USAGE
          • oceanbase.DBA_OB_SYS_VARIABLES
          • oceanbase.DBA_OB_TABLE_LOCATIONS
          • oceanbase.DBA_OB_TABLE_OPT_STAT_GATHER_HISTORY
          • oceanbase.DBA_OB_TABLE_STAT_STALE_INFO
          • oceanbase.DBA_OB_TABLEGROUP_PARTITIONS
          • oceanbase.DBA_OB_TABLEGROUP_SUBPARTITIONS
          • oceanbase.DBA_OB_TABLEGROUP_TABLES
          • oceanbase.DBA_OB_TABLEGROUPS
          • oceanbase.DBA_OB_TABLET_REPLICAS
          • oceanbase.DBA_OB_TABLE_SPACE_USAGE
          • oceanbase.DBA_OB_TABLET_TO_LS
          • oceanbase.DBA_OB_TASK_OPT_STAT_GATHER_HISTORY
          • oceanbase.DBA_OB_TENANT_EVENT_HISTORY
          • oceanbase.DBA_OB_TENANTS
          • oceanbase.DBA_OB_TEMP_FILES
          • oceanbase.DBA_OB_TRANSFER_PARTITION_TASKS
          • oceanbase.DBA_OB_TRANSFER_PARTITION_TASK_HISTORY
          • oceanbase.DBA_OB_TRANSFER_TASK_HISTORY
          • oceanbase.DBA_OB_TRANSFER_TASKS
          • oceanbase.DBA_OB_USER_DEFINED_RULES
          • oceanbase.DBA_OB_USERS
          • oceanbase.DBA_OB_VECTOR_INDEX_TASKS
          • oceanbase.DBA_OB_VECTOR_INDEX_TASK_HISTORY
          • oceanbase.DBA_OB_ZONE_MAJOR_COMPACTION
          • oceanbase.DBA_OBJECTS
          • oceanbase.DBA_PART_COL_STATISTICS
          • oceanbase.DBA_PART_HISTOGRAMS
          • oceanbase.DBA_PART_INDEXES
          • oceanbase.DBA_PART_KEY_COLUMNS
          • oceanbase.DBA_PART_TABLES
          • oceanbase.DBA_RECYCLEBIN
          • oceanbase.DBA_RSRC_CONSUMER_GROUPS
          • oceanbase.DBA_RSRC_GROUP_MAPPINGS
          • oceanbase.DBA_RSRC_PLAN_DIRECTIVES
          • oceanbase.DBA_RSRC_PLANS
          • oceanbase.DBA_SCHEDULER_JOBS
          • oceanbase.DBA_SCHEDULER_JOB_RUN_DETAILS
          • oceanbase.DBA_SCHEDULER_WINDOWS
          • oceanbase.DBA_SEQUENCES
          • oceanbase.DBA_SQL_MANAGEMENT_CONFIG
          • oceanbase.DBA_SQL_PLAN_BASELINES
          • oceanbase.DBA_SUBPART_COL_STATISTICS
          • oceanbase.DBA_SUBPART_HISTOGRAMS
          • oceanbase.DBA_SUBPART_KEY_COLUMNS
          • oceanbase.DBA_SUBPARTITION_TEMPLATES
          • oceanbase.DBA_TAB_COL_STATISTICS
          • oceanbase.DBA_TAB_HISTOGRAMS
          • oceanbase.DBA_TAB_MODIFICATIONS
          • oceanbase.DBA_TAB_PARTITIONS
          • oceanbase.DBA_TAB_STATISTICS
          • oceanbase.DBA_TAB_STATS_HISTORY
          • oceanbase.DBA_TAB_SUBPARTITIONS
          • oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY
          • oceanbase.DBA_WR_CONTROL
          • oceanbase.DBA_WR_EVENT_NAME
          • oceanbase.DBA_WR_SNAPSHOT
          • oceanbase.DBA_WR_SQLSTAT
          • oceanbase.DBA_WR_SQLTEXT
          • oceanbase.DBA_WR_STATNAME
          • oceanbase.DBA_WR_SYS_TIME_MODEL
          • oceanbase.DBA_WR_SYSSTAT
          • oceanbase.DBA_WR_SYSTEM_EVENT
        • Performance views
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          • V$OB_MEMORY
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          • V$OB_RPC_INCOMING
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          • V$OB_PARAMETERS
          • V$OB_PLAN_CACHE_PLAN_EXPLAIN
          • V$OB_PLAN_CACHE_PLAN_STAT
          • V$OB_PLAN_CACHE_STAT
          • V$OB_PROCESSLIST
          • V$OB_PS_ITEM_INFO
          • V$OB_PS_STAT
          • V$OB_PX_P2P_DATAHUB
          • V$OB_PX_TARGET_MONITOR
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          • V$OB_QUERY_RESPONSE_TIME_HISTOGRAM
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          • V$RSRC_PLAN
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          • V$OB_SESS_TIME_MODEL
          • V$OB_SESSION
          • V$SESSION_EVENT
          • V$OB_SHARED_STORAGE_QUOTA
          • V$OB_SQL_AUDIT
          • V$OB_SQL_CCL_STATUS
          • V$SQL_JOIN_FILTER
          • V$OB_SQL_PLAN
          • V$OB_SQL_WORKAREA_MEMORY_INFO
          • V$OB_SQLSTAT
          • V$OB_SSTABLES
          • V$OB_SS_LOCAL_CACHE
          • V$OB_STORAGE_CACHE_TASKS
          • V$OB_SYS_TIME_MODEL
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          • V$OB_TABLET_LOCAL_CACHE
          • V$OB_TENANT_MEMORY
          • V$OB_TENANT_RESOURCE_LIMIT
          • V$OB_TENANT_RESOURCE_LIMIT_DETAIL
          • V$OB_TIMESTAMP_SERVICE
          • V$OB_TRANSACTION_PARTICIPANTS
          • V$OB_TRANSACTION_SCHEDULERS
          • V$OB_UNITS
          • V$OB_VECTOR_MEMORY
          • V$RESTORE_POINT
          • V$SESSION_LONGOPS
          • V$SESSION_WAIT
          • V$SESSION_WAIT_HISTORY
          • V$SESSTAT
          • V$SQL_MONITOR_STATNAME
          • V$SQL_PLAN_MONITOR
          • V$SQL_WORKAREA
          • V$SQL_WORKAREA_ACTIVE
          • V$SQL_WORKAREA_HISTOGRAM
          • V$STATNAME
          • V$SYSSTAT
          • V$SYSTEM_EVENT
          • V$OB_ARBITRATION_MEMBER_INFO
          • V$OB_ARBITRATION_SERVICE_STATUS
          • V$OB_LOCKS
          • V$OB_OPT_STAT_GATHER_MONITOR
          • V$OB_THREAD
      • Oracle tenant views
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          • DBA_OB_BACKUP_DELETE_POLICY
          • DBA_OB_BACKUP_DELETE_TASK_HISTORY
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          • DBA_OB_BACKUP_TASK_HISTORY
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          • DBA_OB_BALANCE_JOB_HISTORY
          • DBA_OB_BALANCE_JOBS
          • DBA_OB_BALANCE_TASK_HISTORY
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          • DBA_OB_CONCURRENT_LIMIT_SQL
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          • DBA_OB_IMPORT_TABLE_TASKS
          • DBA_OB_LOG_RESTORE_SOURCE
          • DBA_OB_LS
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          • DBA_OB_LS_ARB_REPLICA_TASK_HISTORY
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          • DBA_OB_LS_REPLICA_TASK_HISTORY
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          • USER_ARGUMENTS
          • USER_AUDIT_OBJECT
          • USER_AUDIT_SESSION
          • USER_AUDIT_STATEMENT
          • USER_AUDIT_TRAIL
          • USER_COL_COMMENTS
          • USER_COL_PRIVS
          • USER_COLL_TYPES
          • USER_CONS_COLUMNS
          • USER_CONSTRAINTS
          • USER_DB_LINKS
          • USER_DEPENDENCIES
          • USER_ERRORS
          • USER_IND_COLUMNS
          • USER_IND_EXPRESSIONS
          • USER_IND_PARTITIONS
          • USER_IND_STATISTICS
          • USER_IND_SUBPARTITIONS
          • USER_INDEXES
          • USER_PLSQL_TYPES
          • USER_PLSQL_COLL_TYPES
          • USER_PLSQL_TYPE_ATTRS
          • USER_JOBS
          • USER_MVIEW_LOGS
          • USER_MVIEWS
          • USER_MVREF_CHANGE_STATS
          • USER_MVREF_RUN_STATS
          • USER_MVREF_STATS
          • USER_MVREF_STATS_PARAMS
          • USER_MVREF_STATS_SYS_DEFAULTS
          • USER_MVREF_STMT_STATS
          • USER_OBJECTS
          • USER_OB_SOURCE
          • USER_PART_COL_STATISTICS
          • USER_PART_HISTOGRAMS
          • USER_PART_INDEXES
          • USER_PART_KEY_COLUMNS
          • USER_PART_TABLES
          • USER_POLICIES
          • USER_POLICY_CONTEXTS
          • USER_POLICY_GROUPS
          • USER_PROCEDURES
          • USER_PROFILES
          • USER_RECYCLEBIN
          • USER_ROLE_PRIVS
          • USER_SCHEDULER_JOB_ARGS
          • USER_SCHEDULER_PROGRAM_ARGS
          • USER_SEC_RELEVANT_COLS
          • USER_SEGMENTS
          • USER_SEQUENCES
          • USER_SOURCE
          • USER_SUBPART_COL_STATISTICS
          • USER_SUBPART_HISTOGRAMS
          • USER_SUBPART_KEY_COLUMNS
          • USER_SUBPARTITION_TEMPLATES
          • USER_SYNONYMS
          • USER_SYS_PRIVS
          • USER_TAB_COL_STATISTICS
          • USER_TAB_COLS
          • USER_TAB_COLUMNS
          • USER_TAB_COMMENTS
          • USER_TAB_HISTOGRAMS
          • USER_TAB_MODIFICATIONS
          • USER_TAB_PARTITIONS
          • USER_TAB_PRIVS
          • USER_TAB_STATISTICS
          • USER_TAB_STATS_HISTORY
          • USER_TAB_SUBPARTITIONS
          • USER_TABLES
          • USER_TABLESPACES
          • USER_TRIGGER_ORDERING
          • USER_TRIGGERS
          • USER_TYPE_ATTRS
          • USER_TYPE_METHODS
          • USER_TYPES
          • USER_USERS
          • USER_VIEWS
        • Performance views
          • GV$ACTIVE_SESSION_HISTORY
          • GV$DBLINK
          • GV$DML_STATS
          • GV$GLOBAL_TRANSACTION
          • GV$INSTANCE
          • GV$OB_ACTIVE_SESSION_HISTORY
          • GV$OB_ARBITRATION_MEMBER_INFO
          • GV$OB_COMPACTION_DIAGNOSE_INFO
          • GV$OB_COMPACTION_PROGRESS
          • GV$OB_COMPACTION_SUGGESTIONS
          • GV$OB_CGROUP_CONFIG
          • GV$OB_DTL_INTERM_RESULT_MONITOR
          • GV$OB_FLT_TRACE_CONFIG
          • GV$OB_FUNCTION_IO_STAT
          • GV$OB_GLOBAL_TRANSACTION
          • GV$OB_GROUP_IO_STAT
          • GV$OB_KVCACHE
          • GV$OB_LOG_STAT
          • GV$OB_LOG_TRANSPORT_DEST_STAT
          • GV$OB_LS_SNAPSHOTS
          • GV$OB_MEMORY
          • GV$OB_MEMSTORE
          • GV$OB_MEMSTORE_INFO
          • GV$OB_NIC_INFO
          • GV$OB_OPT_STAT_GATHER_MONITOR
          • GV$OB_PARAMETERS
          • GV$OB_PLAN_CACHE_PLAN_EXPLAIN
          • GV$OB_PL_CACHE_OBJECT
          • GV$OB_PLAN_CACHE_PLAN_STAT
          • GV$OB_PLAN_CACHE_STAT
          • GV$OB_PROCESSLIST
          • GV$OB_PS_ITEM_INFO
          • GV$OB_PS_STAT
          • GV$OB_PX_P2P_DATAHUB
          • GV$OB_PX_TARGET_MONITOR
          • GV$OB_PX_WORKER_STAT
          • GV$OB_QUERY_RESPONSE_TIME_HISTOGRAM
          • GV$OB_RES_MGR_SYSSTAT
          • GV$OB_SERVER_SCHEMA_INFO
          • GV$OB_SESS_TIME_MODEL
          • GV$OB_SESSION
          • GV$OB_SHARED_STORAGE_QUOTA
          • GV$OB_SQL_AUDIT
          • GV$OB_SQL_CCL_STATUS
          • GV$SQL_JOIN_FILTER
          • GV$OB_SQL_PLAN
          • GV$OB_SQL_WORKAREA_MEMORY_INFO
          • GV$OB_SQLSTAT
          • GV$OB_SSTABLES
          • GV$OB_SS_LOCAL_CACHE
          • GV$OB_SYS_TIME_MODEL
          • GV$OB_TABLET_COMPACTION_HISTORY
          • GV$OB_TABLET_COMPACTION_PROGRESS
          • GV$OB_TENANT_MEMORY
          • GV$OB_TENANT_RESOURCE_LIMIT
          • GV$OB_TENANT_RESOURCE_LIMIT_DETAIL
          • GV$OB_TRANSACTION_PARTICIPANTS
          • GV$OB_TRANSACTION_SCHEDULERS
          • GV$OB_UNITS
          • GV$OB_RESULT_CACHE_OBJECTS
          • GV$OPEN_CURSOR
          • GV$SESSION_WAIT
          • GV$SESSION_WAIT_HISTORY
          • GV$SESSTAT
          • GV$SQL_PLAN_MONITOR
          • GV$SQL_WORKAREA
          • GV$SQL_WORKAREA_ACTIVE
          • GV$SQL_WORKAREA_HISTOGRAM
          • GV$SYSSTAT
          • GV$SYSTEM_EVENT
          • GV$OB_ARBITRATION_SERVICE_STATUS
          • GV$OB_LOCKS
          • GV$OB_THREAD
          • V$ACTIVE_SESSION_HISTORY
          • V$DBLINK
          • V$DML_STATS
          • V$OB_ENCRYPTED_TABLES
          • V$ENCRYPTED_TABLESPACES
          • V$EVENT_NAME
          • V$GLOBAL_TRANSACTION
          • V$GLOBALCONTEXT
          • V$INSTANCE
          • V$OB_MEMORY
          • V$OB_MEMSTORE
          • V$NLS_PARAMETERS
          • V$OB_ACTIVE_SESSION_HISTORY
          • V$OB_ARBITRATION_MEMBER_INFO
          • V$OB_ARCHIVE_DEST_STATUS
          • V$OB_COMPACTION_DIAGNOSE_INFO
          • V$OB_COMPACTION_PROGRESS
          • V$OB_COMPACTION_SUGGESTIONS
          • V$OB_CGROUP_CONFIG
          • V$OB_DTL_INTERM_RESULT_MONITOR
          • V$OB_DYNAMIC_PARTITION_TABLES
          • V$OB_FUNCTION_IO_STAT
          • V$OB_GLOBAL_TRANSACTION
          • V$OB_GROUP_IO_STAT
          • V$OB_KVCACHE
          • V$OB_LOG_STAT
          • V$OB_LOG_TRANSPORT_DEST_STAT
          • V$OB_LS_LOG_RESTORE_STATUS
          • V$OB_LS_SNAPSHOTS
          • V$OB_MEMSTORE_INFO
          • V$OB_NIC_INFO
          • V$OB_OPT_STAT_GATHER_MONITOR
          • V$OB_PARAMETERS
          • V$OB_PL_CACHE_OBJECT
          • V$OB_PROCESSLIST
          • V$OB_PX_P2P_DATAHUB
          • V$OB_PX_TARGET_MONITOR
          • V$OB_PX_WORKER_STAT
          • V$OB_QUERY_RESPONSE_TIME_HISTOGRAM
          • V$OB_RES_MGR_SYSSTAT
          • V$OB_RESULT_CACHE_OBJECTS
          • V$OB_SERVER_SCHEMA_INFO
          • V$OB_SESS_TIME_MODEL
          • V$OB_SESSION
          • V$OB_SHARED_STORAGE_QUOTA
          • V$OB_SQL_PLAN
          • V$OB_SQL_WORKAREA_MEMORY_INFO
          • V$OB_SQLSTAT
          • V$OB_SS_LOCAL_CACHE
          • V$OB_SYS_TIME_MODEL
          • V$OB_TABLET_COMPACTION_HISTORY
          • V$OB_TABLET_COMPACTION_PROGRESS
          • V$OB_TENANT_RESOURCE_LIMIT
          • V$OB_TENANT_RESOURCE_LIMIT_DETAIL
          • V$OB_TIMESTAMP_SERVICE
          • V$OB_TRANSACTION_PARTICIPANTS
          • V$OB_TRANSACTION_SCHEDULERS
          • V$OB_UNITS
          • V$OPEN_CURSOR
          • V$OB_PLAN_CACHE_PLAN_EXPLAIN
          • V$OB_PLAN_CACHE_PLAN_STAT
          • V$OB_PLAN_CACHE_STAT
          • V$OB_PS_ITEM_INFO
          • V$OB_PS_STAT
          • V$RSRC_PLAN
          • V$SESSION_WAIT
          • V$SESSION_WAIT_HISTORY
          • V$SESSTAT
          • V$OB_SQL_AUDIT
          • V$OB_SQL_CCL_STATUS
          • V$SQL_JOIN_FILTER
          • V$SQL_MONITOR_STATNAME
          • V$SQL_PLAN_MONITOR
          • V$SQL_WORKAREA
          • V$SQL_WORKAREA_ACTIVE
          • V$SQL_WORKAREA_HISTOGRAM
          • V$OB_SSTABLES
          • V$RESTORE_POINT
          • V$STATNAME
          • V$SYSSTAT
          • V$SYSTEM_EVENT
          • V$OB_TENANT_MEMORY
          • V$TIMEZONE_NAMES
          • V$VERSION
          • V$OB_ARBITRATION_SERVICE_STATUS
          • V$OB_LOCKS
          • V$OB_LS_REPLICA_TASK_PLAN
          • V$OB_THREAD
      • Description of common statistical events
      • General wait events
    • Parameters and system variables
      • Overview
      • Changes in V3.x and V4.x
      • Parameters
        • Overview of parameters
        • Cluster-level parameters
          • alert_log_level
          • all_cluster_list
          • all_server_list
          • arbitration_degradation_policy
          • auto_broadcast_location_cache_rate_limit
          • auto_leader_switch_interval
          • auto_refresh_location_cache_rate_limit
          • autoinc_cache_refresh_interval
          • backup_backup_dest
          • backup_backup_dest_option
          • backup_concurrency
          • backup_dest
          • backup_dest_option
          • backup_log_archive_option
          • backup_net_limit
          • backup_recovery_window
          • backup_region
          • backup_zone
          • balance_blacklist_failure_threshold
          • balance_blacklist_retry_interval
          • balancer_emergency_percentage
          • balancer_log_interval
          • balancer_task_timeout
          • balancer_timeout_check_interval
          • balancer_tolerance_percentage
          • bf_cache_miss_count_threshold
          • bf_cache_priority
          • builtin_db_data_verify_cycle
          • cache_wash_threshold
          • clog_cache_priority
          • clog_disk_usage_limit_percentage
          • clog_disk_utilization_threshold
          • clog_expire_days
          • clog_io_isolation_mode
          • clog_sync_time_warn_threshold
          • clog_transport_compress_func
          • cluster
          • cluster_id
          • config_additional_dir
          • cpu_count
          • cpu_reserved
          • data_copy_concurrency
          • data_dir
          • data_disk_usage_limit_percentage
          • data_disk_write_limit_percentage
          • data_storage_error_tolerance_time
          • data_storage_warning_tolerance_time
          • datafile_disk_percentage
          • datafile_maxsize
          • datafile_next
          • datafile_size
          • dead_socket_detection_timeout
          • debug_sync_timeout
          • default_compress
          • default_compress_func
          • default_row_format
          • default_transport_compress_func
          • devname
          • diag_syslog_per_error_limit
          • disk_io_thread_count
          • dtl_buffer_size
          • election_blacklist_interval
          • election_cpu_quota
          • _enable_add_fulltext_index_to_existing_table
          • enable_asan_for_memory_context
          • enable_async_syslog
          • enable_auto_leader_switch
          • enable_auto_refresh_location_cache
          • enable_cgroup
          • enable_dblink
          • enable_ddl
          • enable_election_group
          • enable_global_background_resource_isolation
          • enable_global_freeze_trigger
          • enable_log_archive
          • enable_major_freeze
          • enable_manual_merge
          • enable_merge_by_turn
          • enable_ob_esi_process
          • enable_ob_ratelimit
          • enable_one_phase_commit
          • enable_perf_event
          • enable_pg
          • enable_record_trace_id
          • enable_record_trace_log
          • enable_rereplication
          • enable_rich_error_msg
          • enable_rootservice_standalone
          • enable_rpc_authentication_bypass
          • enable_separate_sys_clog
          • enable_smooth_leader_switch
          • enable_sql_audit
          • enable_sql_operator_dump
          • enable_sys_table_ddl
          • enable_sys_unit_standalone
          • enable_syslog_recycle
          • enable_syslog_wf
          • enable_tcp_keepalive
          • enable_upgrade_mode
          • fast_recovery_concurrency
          • flush_log_at_trx_commit
          • fuse_row_cache_priority
          • gc_wait_archive
          • get_leader_candidate_rpc_timeout
          • global_background_cpu_quota
          • global_index_build_single_replica_timeout
          • global_major_freeze_residual_memory
          • global_write_halt_residual_memory
          • high_priority_net_thread_count
          • ignore_replay_checksum_error
          • ignore_replica_checksum_error
          • ilog_index_expire_time
          • index_block_cache_priority
          • index_cache_priority
          • index_clog_cache_priority
          • index_info_block_cache_priority
          • internal_sql_execute_timeout
          • large_query_threshold
          • large_query_worker_percentage
          • leak_mod_to_check
          • lease_time
          • local_ip
          • location_cache_cpu_quota
          • location_cache_expire_time
          • location_cache_priority
          • location_cache_refresh_min_interval
          • location_cache_refresh_rpc_timeout
          • location_cache_refresh_sql_timeout
          • location_fetch_concurrency
          • location_refresh_thread_count
          • log_archive_batch_buffer_limit
          • log_archive_checkpoint_interval
          • log_disk_percentage
          • log_disk_size
          • log_storage_warning_tolerance_time
          • ls_meta_table_check_interval
          • max_kept_major_version_number
          • max_px_worker_count
          • max_string_print_length
          • max_syslog_file_count
          • memory_chunk_cache_size
          • memory_limit
          • memory_limit_percentage
          • memory_reserved
          • memstore_limit_percentage
          • merge_stat_sampling_ratio
          • merge_thread_count
          • merger_completion_percentage
          • merger_switch_leader_duration_time
          • merger_warm_up_duration_time
          • micro_block_merge_verify_level
          • migrate_concurrency
          • migration_disable_time
          • min_observer_version
          • minor_deferred_gc_time
          • minor_freeze_times
          • minor_merge_concurrency
          • minor_warm_up_duration_time
          • multiblock_read_gap_size
          • multiblock_read_size
          • mysql_port
          • net_thread_count
          • ob_esi_io_concurrency
          • ob_esi_max_syslog_file_count
          • ob_esi_memory_limit
          • ob_esi_rpc_port
          • ob_esi_session_timeout
          • ob_esi_syslog_level
          • ob_event_history_recycle_interval
          • ob_ratelimit_stat_period
          • ob_startup_mode
          • obconfig_url
          • observer_id
          • ob_storage_s3_url_encode_type
          • ob_enable_java_env
          • ob_java_home
          • ob_java_connector_path
          • ob_java_opts
          • ofs_list
          • opt_tab_stat_cache_priority
          • partition_table_check_interval
          • plan_cache_evict_interval
          • plan_cache_high_watermark
          • plan_cache_low_watermark
          • px_task_size
          • px_workers_per_cpu_quota
          • rdma_io_thread_count
          • rebuild_replica_data_lag_threshold
          • recyclebin_object_expire_time
          • replica_safe_remove_time
          • resource_hard_limit
          • resource_soft_limit
          • restore_concurrency
          • rootservice_async_task_queue_size
          • rootservice_async_task_thread_count
          • rootservice_list
          • rootservice_memory_limit
          • rootservice_ready_check_interval
          • row_compaction_update_limit
          • row_purge_thread_count
          • rpc_client_authentication_method
          • rpc_port
          • rpc_server_authentication_method
          • rpc_timeout
          • schema_history_expire_time
          • schema_history_recycle_interval
          • server_balance_cpu_mem_tolerance_percent
          • server_balance_critical_disk_waterlevel
          • server_balance_disk_tolerance_percent
          • server_check_interval
          • server_cpu_quota_max
          • server_cpu_quota_min
          • server_data_copy_in_concurrency
          • server_data_copy_out_concurrency
          • server_permanent_offline_time
          • sql_audit_memory_limit
          • sql_login_thread_count
          • sql_net_thread_count
          • sql_protocol_min_tls_version
          • ssl_client_authentication
          • ssl_external_kms_info
          • stack_size
          • standby_fetch_log_bandwidth_limit
          • storage_meta_cache_priority
          • strict_check_os_params
          • switchover_process_thread_count
          • sync_io_thread_count
          • sys_bkgd_io_high_percentage
          • sys_bkgd_io_low_percentage
          • sys_bkgd_migration_change_member_list_timeout
          • sys_bkgd_migration_retry_num
          • sys_bkgd_net_percentage
          • sys_cpu_limit_trigger
          • syslog_compress_func
          • syslog_disk_size
          • syslog_file_uncompressed_count
          • syslog_io_bandwidth_limit
          • syslog_level
          • system_cpu_quota
          • system_memory
          • system_trace_level
          • tableapi_transport_compress_func
          • tablet_ls_cache_priority
          • tablet_meta_table_check_interval
          • tablet_meta_table_scan_batch_count
          • tablet_size
          • tcp_keepcnt
          • tcp_keepidle
          • tcp_keepintvl
          • tenant_cpu_variation_per_server
          • tenant_groups
          • tenant_task_queue_size
          • token_reserved_percentage
          • trace_log_sampling_interval
          • trace_log_slow_query_watermark
          • trx_2pc_retry_interval
          • trx_force_kill_threshold
          • trx_try_wait_lock_timeout
          • unit_balance_resource_weight
          • unit_gc_wait_time
          • use_large_pages
          • user_block_cache_priority
          • user_iort_up_percentage
          • user_row_cache_priority
          • user_tab_col_stat_cache_priority
          • virtual_table_location_cache_expire_time
          • wait_leader_batch_count
          • weak_read_version_refresh_interval
          • workers_per_cpu_quota
          • zone
          • zone_merge_concurrency
          • zone_merge_order
          • zone_merge_timeout
        • Tenant-level parameters
          • arbitration_timeout
          • archive_lag_target
          • approx_count_distinct_precision
          • audit_log_buffer_size
          • audit_log_compression
          • audit_log_enable
          • audit_log_format
          • audit_log_max_size
          • audit_log_path
          • audit_log_prune_seconds
          • audit_log_query_sql
          • audit_log_rotate_on_size
          • audit_log_strategy
          • audit_sys_operations
          • audit_trail
          • auto_split_tablet_size
          • backup_data_file_size
          • balancer_idle_time
          • choose_migration_source_policy
          • clog_max_unconfirmed_log_count
          • clog_persistence_compress_func
          • compaction_dag_cnt_limit
          • compaction_high_thread_score
          • compaction_low_thread_score
          • compaction_mid_thread_score
          • compaction_schedule_tablet_batch_cnt
          • compatible
          • connection_control_failed_connections_threshold
          • connection_control_max_connection_delay
          • connection_control_min_connection_delay
          • cpu_quota_concurrency
          • ddl_thread_score
          • default_auto_increment_mode
          • default_enable_extended_rowid
          • default_load_mode
          • default_progressive_merge_num
          • default_skip_index_level
          • default_storage_cache_policy
          • default_table_merge_engine
          • default_table_organization
          • default_table_store_format
          • direct_load_allow_fallback
          • dump_data_dictionary_to_log_interval
          • enable_adaptive_plan_cache
          • enable_auto_split
          • enable_clog_persistence_compress
          • enable_early_lock_release
          • enable_kv_group_commit
          • enable_kv_ttl
          • enable_lock_priority
          • enable_manual_storage_cache_policy
          • enable_mlog_auto_maintenance
          • enable_monotonic_weak_read
          • enable_mv_binlog_minimal_mode
          • enable_rebalance
          • enable_sql_extension
          • enable_transfer
          • enable_user_defined_rewrite_rules
          • enable_ps_parameterize
          • external_kms_info
          • freeze_trigger_percentage
          • global_index_auto_split_policy
          • ha_high_thread_score
          • ha_low_thread_score
          • ha_mid_thread_score
          • io_category_config
          • job_queue_processes
          • json_document_max_depth
          • kv_ttl_duty_duration
          • kv_group_commit_batch_size
          • kv_group_commit_rw_mode
          • kv_hbase_client_scanner_timeout_period
          • kv_ttl_history_recycle_interval
          • load_vector_index_on_follower
          • lob_enable_block_cache_threshold
          • log_archive_concurrency
          • log_disk_throttling_maximum_duration
          • log_disk_throttling_percentage
          • log_disk_utilization_limit_threshold
          • log_disk_utilization_threshold
          • log_restore_concurrency
          • log_storage_compress_all
          • log_storage_compress_func
          • log_transport_compress_all
          • log_transport_compress_func
          • ls_gc_delay_time
          • major_compact_trigger
          • major_freeze_duty_time
          • max_partition_num
          • max_stale_time_for_weak_consistency
          • merger_check_interval
          • minor_compact_trigger
          • mlog_trim_interval
          • ob_compaction_schedule_interval
          • ob_enable_batched_multi_statement
          • ob_encoding_granularity
          • ob_proxy_readonly_transaction_routing_policy
          • ob_query_switch_leader_retry_timeout
          • ob_ssl_invited_common_names
          • ob_vector_memory_limit_percentage
          • open_cursors
          • optimizer_index_cost_adj
          • partition_balance_schedule_interval
          • plsql_code_type
          • plsql_debug
          • plsql_optimize_level
          • plsql_v2_compatibility
          • px_node_policy
          • package_state_sync_max_size
          • query_memory_limit_percentage
          • query_response_time_flush
          • query_response_time_range_base
          • query_response_time_stats
          • range_optimizer_max_mem_size
          • recover_table_concurrency
          • recover_table_dop
          • replica_parallel_migration_mode
          • result_cache_max_size
          • result_cache_max_result
          • ob_result_cache_evict_percentage
          • ob_deterministic_udf_cache_max_size
          • rpc_memory_limit_percentage
          • shared_log_retention
          • spill_compression_codec
          • sql_work_area
          • standby_db_fetch_log_rpc_timeout
          • standby_db_preferred_upstream_log_region
          • sts_credential
          • tde_method
          • tenant_sql_login_thread_count
          • tenant_sql_net_thread_count
          • temporary_file_max_disk_size
          • storage_rowsets_size
          • suspend_storage_cache_task
          • ttl_thread_score
          • undo_retention
          • vector_index_memory_saving_mode
          • vector_index_optimize_duty_time
          • workarea_size_policy
          • writing_throttling_maximum_duration
          • writing_throttling_trigger_percentage
      • System variables
        • System variable summary
        • Global variables
          • activate_all_roles_on_login
          • auto_increment_cache_size
          • auto_increment_increment
          • auto_increment_offset
          • autocommit
          • automatic_sp_privileges
          • binlog_row_image
          • block_encryption_mode
          • character_set_client
          • character_set_connection
          • cardinality_estimation_model
          • character_set_database
          • character_set_filesystem
          • character_set_results
          • character_set_server
          • character_set_system
          • collation_connection
          • collation_database
          • collation_server
          • connect_timeout
          • cte_max_recursion_depth
          • cursor_sharing
          • datadir
          • default_password_lifetime
          • default_storage_engine
          • div_precision_increment
          • error_on_overlap_time
          • event_scheduler
          • explicit_defaults_for_timestamp
          • ENABLE_OPTIMIZER_ROWGOAL
          • foreign_key_checks
          • group_concat_max_len
          • identity
          • init_connect
          • innodb_stats_persistent
          • innodb_strict_mode
          • interactive_timeout
          • license
          • lc_time_names
          • log_row_value_options
          • long_query_time
          • lower_case_table_names
          • max_allowed_packet
          • max_connections
          • max_sp_recursion_depth
          • max_user_connections
          • mview_refresh_dop
          • net_buffer_length
          • net_read_timeout
          • net_write_timeout
          • nls_calendar
          • nls_characterset
          • nls_comp
          • nls_currency
          • nls_date_format
          • nls_date_language
          • nls_dual_currency
          • nls_iso_currency
          • nls_length_semantics
          • nls_nchar_characterset
          • nls_nchar_conv_excp
          • nls_numeric_characters
          • nls_sort
          • nls_territory
          • nls_timestamp_format
          • nls_timestamp_tz_format
          • ob_bnl_join_cache_size
          • ob_compatibility_mode
          • ob_compatibility_control
          • ob_compatibility_version
          • ob_create_table_strict_mode
          • ob_default_lob_inrow_threshold
          • ob_default_replica_num
          • ob_early_lock_release
          • ob_enable_ps_parameter_anonymous_block
          • ob_enable_aggregation_pushdown
          • ob_enable_blk_nestedloop_join
          • ob_enable_hash_group_by
          • ob_enable_index_direct_select
          • ob_enable_jit
          • ob_enable_pl_cache
          • ob_enable_plan_cache
          • ob_enable_rich_error_msg
          • ob_enable_sql_audit
          • ob_enable_transformation
          • ob_enable_transmission_checksum
          • ob_enable_truncate_flashback
          • ob_global_debug_sync
          • ob_log_level
          • ob_max_read_stale_time
          • ob_pl_block_timeout
          • ob_plan_cache_evict_high_percentage
          • ob_plan_cache_evict_low_percentage
          • ob_plan_cache_percentage
          • ob_proxy_global_variables_version
          • ob_query_timeout
          • ob_read_consistency
          • ob_reserved_meta_memory_percentage
          • ob_route_policy
          • ob_sql_audit_percentage
          • ob_sql_work_area_percentage
          • ob_table_access_policy
          • ob_tcp_invited_nodes
          • ob_temp_tablespace_size_percentage
          • ob_timestamp_service
          • ob_trx_idle_timeout
          • ob_trx_lock_timeout
          • ob_trx_timeout
          • optimizer_capture_sql_plan_baselines
          • ob_security_version
          • optimizer_dynamic_sampling
          • optimizer_features_enable
          • optimizer_use_sql_plan_baselines
          • parallel_degree_limit
          • parallel_degree_policy
          • parallel_max_servers
          • parallel_min_scan_time_threshold
          • parallel_servers_target
          • performance_schema
          • plugin_dir
          • plsql_ccflags
          • pid_file
          • query_cache_size
          • plsql_optimize_level
          • port
          • query_cache_type
          • query_rewrite_enabled
          • query_rewrite_integrity
          • read_only
          • recyclebin
          • regexp_stack_limit
          • regexp_time_limit
          • resource_manager_plan
          • socket
          • runtime_bloom_filter_max_size
          • runtime_filter_max_in_num
          • runtime_filter_type
          • runtime_filter_wait_time_ms
          • secure_file_priv
          • server_uuid
          • sql_auto_is_null
          • sql_mode
          • sql_quote_show_create
          • sql_safe_updates
          • sql_select_limit
          • sql_throttle_current_priority
          • sql_throttle_network
          • sql_throttle_priority
          • sql_throttle_rt
          • SQL_TRANSPILER
          • sql_warnings
          • system_time_zone
          • time_zone
          • transaction_isolation
          • transaction_read_only
          • tx_isolation
          • tx_read_only
          • validate_password_check_user_name
          • validate_password_length
          • validate_password_mixed_case_count
          • validate_password_number_count
          • validate_password_policy
          • validate_password_special_char_count
          • version
          • version_comment
          • wait_timeout
        • Session-level variables
          • enable_sql_plan_monitor
          • is_result_accurate
          • last_insert_id
          • nls_language
          • ob_capability_flag
          • ob_enable_show_trace
          • ob_hnsw_ef_search
          • ob_ivf_nprobes
          • ob_last_schema_version
          • ob_org_cluster_id
          • ob_sparse_drop_ratio_search
          • ob_proxy_partition_hit
          • ob_proxy_set_trx_executed
          • ob_trace_info
          • optimizer_dynamic_sampling
          • timestamp
          • tracefile_identifier
    • Error codes
      • MySQL mode
        • Overview
        • 0001 to 3999
        • 4000 to 4499
        • 4500 to 4999
        • 5000 to 5999
        • 6000 to 6999
        • 7000 to 7999
        • 8000 to 8999
        • 9000 ~ 9499
        • 9500 to 9999
        • 10000 to 12000
        • 22998, 30926, 38104, and 38105
      • Oracle mode
        • Overview
        • OBE-00000 ~ OBE-00999
        • OBE-01000 to OBE-01499
        • OBE-01500 to OBE-01999
        • OBE-02000 to OBE-04999
        • OBE-05000 to OBE-10000
        • OBE-10000 to OBE-19999
        • OBE-20000 to OBE-29999
        • OBE-30000 to OBE-49999
        • OBE-50000 to OBE-99999
        • PLS-00000 to PLS-00999
    • Performance tuning
      • Overview
      • Performance related tools
        • System tools
          • Top
          • CPU tools
          • Memory tools
          • Disk I/O tools
          • Network tools
        • Internal tables
          • GV$SYSSTAT
          • GV$OB_SQL_AUDIT
          • GV$OB_TRANSACTION_PARTICIPANTS
        • Logs
          • slow trans
          • dump tenant info
          • Trace logs
        • OCP
      • System tuning
        • OS parameter tuning
        • Database parameter tuning
          • CPU parameters
          • I/O parameters
          • Memory-related parameters
          • Network transmission parameters
        • ODP parameter tuning
          • CPU parameters
          • Network transmission parameters
          • Routing parameters on nodes
      • Business model tuning
        • Load balancing
        • SQL diagnostics
        • Distributed transactions
      • Performance diagnosis
        • Monitor and diagnose the cluster performance
        • Diagnose tenant performance
        • Monitor ODP performance
        • Monitor host performance
        • WR management
          • Overview
          • Manage WR
          • Monitor historical session performance
          • Clean up WR data
        • ASH report
          • ASH
          • Generate an ASH report
          • Analyze the ASH report
      • SQL tuning
        • Execution process of SQL queries
        • SQL execution plans
          • Introduction to SQL execution plans
          • Fast parameterization
          • Plan cache
          • Execution plan operators
            • TABLE SCAN
            • JOIN
            • COUNT
            • GROUP BY
            • WINDOW FUNCTION
            • SUBPLAN FILTER
            • DISTINCT
            • SEQUENCE
            • MATERIAL
            • SORT
            • LIMIT
            • FOR UPDATE
            • SELECT INTO
            • SUBPLAN SCAN
            • UNION
            • INTERSECT
            • EXCEPT/MINUS
            • INSERT
            • DELETE
            • UPDATE
            • MERGE
            • EXCHANGE
            • GI
          • Real-time execution plan display
          • SQL optimization practice with EXPLAIN
        • Distributed execution plans
          • Perform distributed execution and parallel queries
          • Generate a distributed plan
          • Schedule distributed execution plans
          • Manage distributed execution plans
          • Parallel execution enabling methods and their priority
          • Auto DOP
          • Execute parallel queries
          • Perform parameter tuning for a parallel query
          • Parallel DML
          • Parallel DDL
        • Parallel execution plans
          • Introduction to parallel execution
          • Classification and optimization of parallel execution
          • Set concurrent execution
            • Concurrency control and queuing
            • Set a DOP for parallel execution
            • Set parallel execution parameters
          • Parallel execution diagnostics
          • Parallel execution tuning tips
          • Quick start
        • SQL tuning
          • Overview
          • General procedure
          • SQL execution performance monitoring
            • SQL audit
            • SQL Trace
            • Plan cache views
            • SQL performance analysis example
              • Use SQL Audit to analyze wait events in a query
              • Analyze SQL queries that cause an abrupt RT jitter
              • View and analyze the shape of an execution plan
              • Analyze slow SQL queries
              • Query SQL traffic distribution and QPS
              • Check whether SQL queries are balanced across servers in a cluster
              • Find the TOP N SQL queries
              • Analyze whether an unusually large number of remote execution requests exist in the system or the execution of an SQL statement
              • Find full table scan SQL statements in a tenant
              • Find the TOP N queries with the longest execution time within a certain period
              • Analyze queries related to distributed plans
              • Check whether the RPC execution count of a distributed subplan is balanced across servers in a cluster
          • Optimizer statistics
            • Overview of statistics
            • Statistics collection methods
              • Overview of methods for collecting statistics
              • Histograms
              • Manual statistics collection
              • Automatic statistics collection
              • Online statistics collection
              • Dynamic sampling
            • Statistics management
              • Overview
              • Delete statistics
              • Set statistics
              • Import and export statistics
              • Lock and unlock statistics
              • Manage statistics history
              • Manage statistics preferences
            • Collection and update strategies of statistics for partitioned tables
            • Monitoring and diagnostics for statistics collection
            • OceanBase statistics management practical guide
          • Query rewrite
            • Overview
            • Rule-based query rewrite
            • Cost-based query rewrite
          • Query optimization
            • Access path
              • Overview
              • Rule-based path selection
              • Cost-based path selection
            • Join algorithm
              • Overview
              • Join algorithms
              • Runtime filter
              • Join order
          • Manage execution plans
            • Optimizer hints
            • Plan binding
            • SPM plan management
        • Glossary
        • General issues in SQL tuning
    • Perform testing
      • OceanBase Sysbench testing
        • Run the Sysbench benchmark test with OceanBase Database
        • Sysbench test report of OceanBase Database
        • High-performance parameter configuration for OceanBase Sysbench
        • Analyze OceanBase Sysbench performance issues
      • OceanBase TPC-C testing
        • Run the TPC-C benchmark test with OceanBase Database
        • TPC-C test report of OceanBase Database
      • OceanBase TPC-DS testing
        • Run the TPC-DS benchmark test with OceanBase Database
        • TPC-DS test report of OceanBase Database
      • OceanBase TPC-H testing
        • Run the TPC-H benchmark test with OceanBase Database
        • TPC-H test report of OceanBase Database
    • Database proxy
      • OceanBase Database Proxy
      • Connection and routing
      • ODP
        • Overview
        • Manage ODP clusters
          • Create an ODP cluster
          • Manage ODP cluster parameters
          • Delete an ODP cluster
          • Upgrade all ODPs in an ODP cluster
          • Restart all ODPs in an ODP cluster
          • Manage OceanBase clusters connected to an ODP cluster
          • Monitor ODP cluster performance
        • Manage ODP
          • Add an ODP
          • Start an ODP
          • Refresh ODP configurations
          • Stop an ODP
          • Restart an ODP
          • Delete an ODP
          • Upgrade one or more ODPs
        • ODP startup parameters
      • Physical connections
      • Logical connection
        • Query all sessions
        • Query the details of a session
        • Query the metrics of a session
        • Query session variables
        • Terminate a server session
      • Route management
        • Table-based routing of ODP
        • LDC-based routing
        • ODP routing policy
          • Read/Write splitting
          • Follower-first read
          • Blocklist mechanism
          • Transaction routing
      • View tenant sessions
      • Terminate a tenant session
      • Set the maximum number of connections for a tenant
    • Drivers
      • ECOB
      • OBCI
      • OceanBase Connector/J
      • OceanBase Connector/C
      • OceanBase Connector/ODBC
    • Platforms
      • OMA
      • OMS
      • OCP
      • ODC
      • OAT
    • Components & tools
      • O&M management
        • obshell
          • Overview
          • Use cases
            • obshell management
              • Start or stop obshell
              • Upgrade obshell
            • cluster management
              • Deploy an OceanBase cluster
              • Take over an OceanBase cluster not deployed by obshell
              • Start an OceanBase cluster
              • Stop an OceanBase cluster
              • Use obshell to scale out an OceanBase cluster
              • Upgrade an OceanBase cluster
              • Initiate a cluster-level backup
            • Tenant management
              • Create a tenant
              • Initiate a tenant-level backup
              • Initiate tenant-level restore
              • Expand a tenant
            • Configure an OBServer node to start automatically on boot
          • obshell commands
            • Agent commands of obshell
            • Cluster commands of obshell
            • obshell unit commands
            • obshell resource pool commands
            • Tenant command group of obshell
            • Task commands of obshell
            • Backup commands in obshell
            • obshell restore command group
            • obshell recyclebin command group
          • API references
            • obshell API requests
            • Hybrid encryption for API operations
            • obshell management
              • AgentUpgradeCheck
              • UpgradeAgent
              • QueryNodeStatus
            • cluster management
              • AddNodeBeforeClusterInitialization
              • DeleteNodeBeforeClusterInitialization
              • SetClusterConfig
              • SetServerConfig
              • InitializeCluster
              • StartCluster
              • StopCluster
              • ObUpgradeCheck
              • UpgradeOb
              • AddNode
              • GetObInfo
            • Unit config management
              • Create a resource specification
              • Retrieve all resource specifications
              • Query the information of a specified resource specification
              • Delete a resource specification
            • Resource pool management
              • Get information about all resource pools
              • Delete a specified resource pool
            • Tenant management
              • Create a tenant
              • Query tenant information
              • Change the tenant password
              • Modify the access whitelist of a tenant
              • Modify the primary zone of a tenant
              • Modify tenant system variables
              • Modify tenant configurations
              • Rename a tenant
              • Delete a tenant
              • Add a tenant replica
              • Modify a tenant replica
              • Delete a tenant replica
              • Lock a tenant
              • Unlock a tenant
              • Get an overview of all tenants
              • Query a system variable of a specified tenant
              • Fuzzy query tenant system variables
              • Query a tenant parameter
              • Fuzzy query tenant parameters
            • Backup management
              • Set the backup configuration for a tenant
              • Set cluster-level backup configurations
              • Update the backup configuration of a tenant
              • Update the cluster-level backup configuration
              • Initiate a backup for a single tenant
              • Initiate a cluster-level backup
              • View information about a backup task for a tenant
              • View cluster-level backup tasks
              • Modify the backup status of a tenant
              • Modify the status of cluster-level backups
              • Modify the log archiving status of a tenant
              • Modify the log archiving status of a cluster
            • Restore management
              • Initiate tenant restore
              • View tenant recovery
              • Cancel tenant restore
            • Recycle bin management
              • Query all tenant information in the recycle bin
              • Restore a tenant from the recycle bin
              • Clear a tenant from the recycle bin
            • Task management
              • OperateDag
              • GetDagDetails
              • GetNodeDetails
              • GetSubtaskDetails
              • QueryUnfinishedTasks
              • QueryUnfinishedAgentTasks
              • QueryUnfinishedObTasks
              • QueryLastObTask
              • QueryLastAgentTask
            • Other APIs
              • UploadPkg
              • GetPublicKey
          • SDK references
            • Python
              • Quick start
              • obshell management
                • Perform an agent upgrade check
                • Upgrade agents
                • Query the status of a node
              • cluster management
                • Add a node before cluster initialization
                • Remove a node before cluster initialization
                • Set cluster-level configurations
                • Set server-level configurations
                • Initialize a cluster
                • Start a cluster
                • Stop a cluster
                • Perform an OceanBase Database upgrade check
                • Upgrade OceanBase Database
                • Scale out a cluster
                • Query the information about a cluster
                • Clean up obshell nodes in an uninitialized cluster
                • Create a cluster
              • Unit config management
                • Create a resource specification
                • Obtain information about all resource specifications
                • Query information about a specified resource unit
                • Delete a resource specification
              • Resource pool management
                • Get information about all resource pools
                • Delete a resource pool
              • Tenant management
                • Create a tenant
                • Query tenant information
                • Change the password of a tenant
                • Modify the access whitelist of a tenant
                • Modify the primary zone of a tenant
                • Modify tenant system variables
                • Modify tenant parameters
                • Rename a tenant
                • Drop a tenant
                • Add a tenant replica
                • Modify a tenant replica
                • Delete a tenant replica
                • Lock a tenant
                • Unlock a tenant
                • Query the overview of all tenants
                • Query tenant system variables
                • Query tenant configuration items
              • Backup management
                • Configure the backup settings for a tenant
                • Configure cluster-level backup settings
                • Update the backup configuration of a tenant
                • Update cluster-level backup configuration
                • Initiate a backup for a single tenant
                • Initiate a cluster-level backup
                • View a backup task of a tenant
                • View cluster-level tenant backup tasks
                • Modify the backup status of a tenant
                • Modify the status of cluster-level backups
                • Change the log archiving status of a tenant
                • Modify the log archiving status of a cluster
              • Restore management
                • Restore a single tenant
                • View tenant recovery
                • Cancel tenant restoration
              • Recycle bin management
                • Get information about all tenants in the recycle bin
                • Restore a tenant from the recycle bin
                • Purge a tenant from the recycle bin
              • Task management
                • Operate a task
                • Obtain the information about a task
                • Obtain the information about a node
                • Obtain the information about a subtask
                • Query all unfinished tasks
                • Query unfinished agent tasks
                • Query unfinished OceanBase cluster tasks
                • Query the last O&M task in an OceanBase cluster
                • Query the last O&M task of an obshell node
              • Other APIs
                • Upload an RPM package
            • GO
              • Quick Start with obshell-sdk-go
              • obshell management
                • Perform an agent upgrade check
                • Upgrade agents
                • Query the status of a node
              • cluster management
                • Add a node before cluster initialization
                • Remove a node before cluster initialization
                • Set cluster-level configurations
                • Set server-level configurations
                • Initialize a cluster
                • Start a cluster
                • Stop a cluster
                • Perform an OceanBase Database upgrade check
                • Upgrade OceanBase Database
                • Scale out a cluster
                • Query the information about a cluster
                • Clean up obshell nodes in an uninitialized cluster
                • Create a cluster
              • Unit config management
                • Create a resource unit configuration
                • Query all resource specifications
                • Query the specifications of a specified resource
                • Drop a resource unit configuration
              • Resource pool management
                • Get information about all resource pools
                • Drop a resource pool
              • Tenant management
                • Create a tenant
                • Query tenant information
                • Change a tenant password
                • Modify the tenant access whitelist
                • Modify the primary zone of a tenant
                • Modify tenant system variables
                • Modify tenant parameters
                • Rename a tenant
                • Drop a tenant
                • Add a tenant replica
                • Modify a tenant replica
                • Delete a tenant replica
                • Lock a tenant
                • Unlock a tenant
                • Query the overview of all tenants
                • Query tenant system variables
                • Query tenant configuration items
              • Backup management
                • Set the backup configuration for a tenant
                • Set the cluster-level backup configuration
                • Update the backup configuration for a tenant
                • Update the cluster-level backup configuration
                • Initiate a backup for a single tenant
                • Initiate a cluster-level backup
                • View a backup task for a tenant
                • View cluster-level tenant backup tasks
                • Modify the backup status of a tenant
                • Modify the status of a cluster-level backup
                • Change the log archiving status of a tenant
                • Modify the status of cluster-level log archiving
              • Restore management
                • Initiate a restore for a single tenant
                • View tenant recovery
                • Cancel tenant restore
              • Recycle bin management
                • Get information about all tenants in the recycle bin
                • Restore a tenant from the recycle bin
                • Purge tenants from the recycle bin
              • Task management
                • Operate a task
                • Obtain the information about a task
                • Obtain the information about a node
                • Obtain the information about a subtask
                • Query all unfinished tasks
                • Query unfinished agent tasks
                • Query unfinished OceanBase cluster tasks
                • Query the last O&M task in an OceanBase cluster
                • Query the last O&M task of an obshell node
              • Other APIs
                • Upload an RPM package
        • obd
        • ob_admin
          • Overview
          • clog
            • log_tool
            • Format of clogs
            • Transaction logs
          • Backup and restore
            • dump_backup
            • test_io_device
            • io_adapter_benchmark
          • dumpsst
        • ob-operator
        • ob_error
      • Monitoring and diagnostics
        • obdiag
        • sql_diagnoser
          • Overview
          • Install and use SQL diagnoser sql_diagnoser
            • Install sql_diagnoser
            • Use sql_diagnoser
          • sql_diagnoser parameters
            • Built-in diagnostic items
            • Diagnostic rule expression
            • API operations
            • Diagnostic items of SQL review
      • Log analysis
        • oblogminer
          • Overview
          • Install oblogminer
          • Command-line options
          • Examples
          • FAQ
      • Data integration
        • obloader and obdumper
        • oblogproxy
        • obcdc
          • OceanBase Binlog Service
          • obcdc parameters
            • Sample configuration file
            • General obcdc parameters
            • obcdc parameters
          • obcdc development instructions
          • obcdc_tailf
          • Throttling
          • obcdc allowlist and blocklist
          • Incremental direct load in obcdc
          • FAQ
      • Stress testing tools
        • mysqltest
          • Use obd.sh to run mysqltest
          • Use of cases
            • Add a test case
            • Test case writing conventions
            • General test case writing commands
    • OceanBase plugin
      • Overview of OceanBase plugin
      • Tokenizer plugin
  • FAQ
    • Products
    • FAQ about SQL statements
    • Deployment
    • Cluster management
    • High availability
    • FAQ about columnstores
  • Release Notes
    • Version number guidelines
    • OceanBase Database Enterprise Edition
      • V4.3
        • OceanBase Database Enterprise Edition V4.3.5
        • OceanBase Database Enterprise Edition V4.3.3
        • OceanBase Database Enterprise Edition V4.3.2
        • OceanBase Database Enterprise Edition V4.3.1
        • OceanBase Database Enterprise Edition V4.3.0
      • V4.2
        • OceanBase Database Enterprise Edition V4.2.5
        • OceanBase Database Enterprise Edition V4.2.1
        • OceanBase Database Enterprise Edition V4.2.0
      • V4.1
        • OceanBase Database Enterprise Edition V4.1.0
      • V3.2
        • OceanBase Database Enterprise Edition V3.2.4
        • OceanBase Database Enterprise Edition V3.2.3
        • OceanBase Database Enterprise Edition V3.2.2
        • OceanBase Database Enterprise Edition V3.2.1
        • OceanBase Database Enterprise Edition V3.2.0
      • V3.1
        • OceanBase Database Enterprise Edition V3.1.2
        • OceanBase Database Enterprise Edition V3.1.1
      • V2.2
        • OceanBase Database Enterprise Edition V2.2.77
        • OceanBase Database Enterprise Edition V2.2.76
        • OceanBase Database Enterprise Edition V2.2.30
    • OceanBase Database Community Edition
      • V4.3
        • OceanBase Database Community Edition V4.3.5
        • OceanBase Database Community Edition V4.3.3
        • OceanBase Database Community Edition V4.3.2
        • OceanBase Database Community Edition V4.3.1
        • OceanBase Database Community Edition V4.3.0
      • V4.2
        • OceanBase Database Community Edition V4.2.5
        • OceanBase Database Community Edition V4.2.1
        • OceanBase Database Community Edition V4.2.0
      • V4.1
        • OceanBase Database Community Edition V4.1.0
      • V4.0
        • OceanBase Database Community Edition V4.0.0
      • V3.1
        • OceanBase Database Community Edition V3.1.5
        • OceanBase Database Community Edition V3.1.4
        • OceanBase Database Community Edition V3.1.3
        • OceanBase Database Community Edition V3.1.2
        • OceanBase Database Community Edition V3.1.1
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System views overview

Last Updated:2026-04-09 02:53:56  Updated
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What is on this page
Overview of views in the sys tenant
Dictionary views overview
Overview of performance views
Views in a MySQL tenant
Dictionary views overview
Overview of performance views
Views in an Oracle tenant
Dictionary views
Overview of performance views

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System views overview

Overview of views in the sys tenant

Dictionary views overview

Tables and columns

View name Description
oceanbase.CDB_IND_COLUMNS This view displays the column information of all index tables in all tenants.
oceanbase.CDB_INDEXES This view displays the INDEX information of all tenants.
oceanbase.CDB_TABLES This view displays the TABLE information of all tenants.
oceanbase.CDB_OB_TABLEGROUP_TABLES This view displays the TABLEGROUP and TABLE relationships of all tenants in the sys tenant. The tables not in a tablegroup are not displayed.
oceanbase.CDB_TAB_COLS This view displays the column information of all tables and views in all tenants.
oceanbase.CDB_TAB_COLS_V$ This view displays the column information of all tables and views in all tenants.
oceanbase.DBA_OB_TABLEGROUP_TABLES This view displays the TABLEGROUP and TABLE relationships. The tables not in a tablegroup are not displayed.
oceanbase.DBA_PART_KEY_COLUMNS This view displays the columns of the partitioning key in all partitioned objects in the database.
oceanbase.DBA_SUBPART_KEY_COLUMNS This view displays the columns of the subpartitioning key in all partitioned objects in the database.
oceanbase.CDB_OB_COLUMN_CHECKSUM_ERROR_INFO This view displays the column checksum error information between the index table (global index and local index) and the primary table.
oceanbase.CDB_OB_TABLE_LOCATIONS This view displays the locations of tables and partitions, including system tables, user tables, and index tables.
oceanbase.DBA_OB_TABLE_LOCATIONS This view displays the locations of tables and partitions, including system tables, user tables, and index tables.
information_schema.TABLESPACES This view displays information about tablespaces.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can query only the table structure.

Materialized view-related views

View Purpose
oceanbase.CDB_MVIEW_RUNNING_JOBS This view displays the materialized view-related tasks that are being executed in all tenants, including refresh tasks and MLOG cleanup tasks.
oceanbase.DBA_MVIEW_DEPS This view displays the dependencies of materialized views in the current tenant.
oceanbase.DBA_MVIEW_LOGS This view displays the logs of materialized views.
oceanbase.DBA_MVIEW_RUNNING_JOBS This view displays the materialized view-related tasks that are being executed in the current tenant, including refresh tasks and MLOG cleanup tasks.
oceanbase.DBA_MVIEWS This view displays the information about all materialized views.
oceanbase.DBA_MVREF_CHANGE_STATS This view displays the statistics about materialized view refreshes.
oceanbase.DBA_MVREF_RUN_STATS This view displays the information about each refresh run of a materialized view. Each refresh run is identified by a REFRESH_ID.
oceanbase.DBA_MVREF_STATS This view displays the basic timing statistics about materialized view refreshes.
oceanbase.DBA_MVREF_STATS_PARAMS This view displays the refresh statistics attributes associated with each materialized view.
oceanbase.DBA_MVREF_STATS_SYS_DEFAULTS This view displays the system-wide default values of the statistics attributes of the materialized view refresh history.
oceanbase.DBA_MVREF_STMT_STATS This view displays the information about the refresh statements.

InnoDB storage engine

View name Description
information_schema.NDB_TRANSID_MYSQL_CONNECTION_MAP This view displays the mapping relationship information between NDB transactions, NDB transaction coordinators, and MySQL servers attached as API nodes to an NDB cluster.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_TRX This view displays the information about active transactions.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_LOCK_WAITS This view displays the information about locks that are waiting for lock conflicts.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_LOCKS This view displays the information about all locks (waiting and held).

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_BUFFER_PAGE This view displays the information about all cached pages in the buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_BUFFER_PAGE_LRU This view displays the LRU-sorted information about pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_BUFFER_POOL_STATS This view displays the statistics about the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMP This view displays the operation status information about compressing InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMP_PER_INDEX This view displays the information about operations on compressing InnoDB tables and indexes.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMP_PER_INDEX_RESET This view displays the reset time information about operations on compressing InnoDB tables and indexes.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMP_RESET This view displays the operation status about compressing InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMPMEM This view displays the status of compressed pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_CMPMEM_RESET This view displays the reset time status of compressed pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_DATAFILES This view displays the data file paths of InnoDB files for each table and general tablespace.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_INDEXES This view displays the metadata about InnoDB indexes.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_TABLES This view displays the metadata about InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_TABLESPACES This view displays the metadata about InnoDB table files and general tablespaces.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_TABLESTATS This view displays the low-level status information about InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_VIRTUAL This view displays the metadata about InnoDB virtual generated columns.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_TEMP_TABLE_INFO This view displays information about active InnoDB temporary tables created by users.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_METRICS This view displays InnoDB performance information.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

Shared storage

View name Purpose
DBA_OB_ZONE_STORAGE This view displays the information about the shared storage cluster configuration for object storage on each zone.

Outline

View name Purpose
oceanbase.DBA_OB_OUTLINES This view displays the execution plan outline information of the current tenant.
oceanbase.DBA_OB_CONCURRENT_LIMIT_SQL This view displays the outline information of the throttling rules of the current tenant.
oceanbase.DBA_OB_OUTLINE_CONCURRENT_HISTORY This view displays the execution plan and throttling rule outline history information of the current tenant.
DBA_OB_FORMAT_OUTLINES This view records the detailed information of the current tenant's format outline.

Basic information about a database

View name Description
oceanbase.CDB_OB_DATABASES This view displays the metadata of all databases in all tenants under the sys tenant.
oceanbase.CDB_OB_MAJOR_COMPACTION This view displays the global major compaction information of all tenants under the sys tenant.
oceanbase.CDB_OB_ZONE_MAJOR_COMPACTION This view displays the major compaction information of all zones in all tenants under the sys tenant.
oceanbase.DBA_OB_DATABASES This view displays the metadata of all databases in the current tenant.
oceanbase.DBA_OB_MAJOR_COMPACTION This view displays the global major compaction information of the current tenant.
oceanbase.DBA_OB_ROOTSERVICE_EVENT_HISTORY This view displays the history of events of the Root Service.
oceanbase.DBA_OB_SERVER_JOBS This view displays the tasks of all OBServer nodes.
oceanbase.DBA_OB_SERVERS This view displays the information of all OBServer nodes.
oceanbase.DBA_OB_ZONE_MAJOR_COMPACTION This view displays the major compaction information of all zones in the current tenant.
oceanbase.DBA_OB_ZONES This view displays the information of all zones.
oceanbase.CDB_OB_FREEZE_INFO This view displays the version information generated by major compaction.
oceanbase.DBA_OB_FREEZE_INFO This view displays the version information generated by major compaction.
information_schema.events This view records all event information.

Partition-related

View Purpose
oceanbase.CDB_IND_PARTITIONS This view displays the partition information of all index tables of all tenants.
oceanbase.CDB_IND_SUBPARTITIONS This view displays the subpartition information of all indexes in the database.
oceanbase.CDB_OB_DYNAMIC_PARTITION_TABLES This view displays the dynamic partition table information of all tenants.
oceanbase.CDB_PART_INDEXES This view displays the partition information of all index tables of all tenants.
oceanbase.CDB_PART_TABLES This view displays the partition information of all partitioned tables of all tenants.
oceanbase.CDB_SUBPARTITION_TEMPLATES This view displays the template secondary partition information of all partitioned tables of all tenants.
oceanbase.CDB_TAB_PARTITIONS This view displays the primary partition information of all partitioned tables of all tenants.
oceanbase.CDB_TAB_SUBPARTITIONS This view displays the secondary partition information of all partitioned tables of all tenants.
oceanbase.DBA_IND_PARTITIONS This view displays the primary partition information of all indexes.
oceanbase.DBA_OB_DYNAMIC_PARTITION_TABLES This view displays the dynamic partition table information of the current tenant.
oceanbase.DBA_PART_INDEXES This view displays the partition information of all partitioned indexes.
oceanbase.DBA_PART_TABLES This view displays the partition information of all user tables.
oceanbase.DBA_TAB_PARTITIONS This view displays the multi-level partition information, partition storage parameters, and partition statistics information accessible to the current user.
oceanbase.DBA_TAB_SUBPARTITIONS This view displays the subpartition name, table name, partition name, storage attributes, and statistics generated by the DBMS_STATS package.
oceanbase.DBA_SUBPARTITION_TEMPLATES This view displays the subpartition template descriptions.

Load balancing

View name Description
oceanbase.CDB_OB_TRANSFER_PARTITION_TASKS This view displays the current partition transfer tasks of all tenants.
oceanbase.CDB_OB_TRANSFER_PARTITION_TASK_HISTORY This view displays the history of partition transfer tasks of all tenants.
oceanbase.DBA_OB_TRANSFER_PARTITION_TASKS This view displays the current partition transfer tasks of the current tenant.
oceanbase.DBA_OB_TRANSFER_PARTITION_TASK_HISTORY This view displays the history of partition transfer tasks of the current tenant.

Full-text index

View name Description
information_schema.INNODB_FT_BEING_DELETED This view displays the information about full-text indexes that are being deleted.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

information_schema.INNODB_FT_CONFIG This view displays the configuration information of the InnoDB full-text search engine.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

information_schema.INNODB_FT_DELETED This view displays the information about full-text indexes that are marked for deletion.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

information_schema.INNODB_FT_INDEX_CACHE This view displays the cache status information of InnoDB full-text indexes.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

information_schema.INNODB_SYS_FIELDS This view displays the metadata information of key columns (fields) of InnoDB indexes, which is equivalent to the information of the SYS_FIELDS table in the InnoDB data dictionary.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

Session

View name Description
oceanbase.CDB_OB_DEADLOCK_EVENT_HISTORY This view displays the history of deadlock events. In the root tenant, this view displays the history of all tenants.
oceanbase.DBA_OB_DEADLOCK_EVENT_HISTORY This view displays the history of deadlock events. In a non-root tenant, this view displays the history of the current tenant.
oceanbase.DBA_OB_SERVER_EVENT_HISTORY This view displays the event history of OBServer nodes.

Backup and restore

View Description
oceanbase.CDB_OB_RESTORE_PROGRESS This view displays the execution progress of a physical restore task.
oceanbase.CDB_OB_RESTORE_HISTORY This view displays the status of a physical restore task upon completion.
oceanbase.CDB_OB_ARCHIVELOG_PIECE_FILES This view displays the status of pieces in a backup set.
oceanbase.CDB_OB_BACKUP_SET_FILES This view displays the file status of a backup set.
oceanbase.CDB_OB_BACKUP_JOBS This view displays all backup jobs of all tenants in the cluster. A backup job record is generated when a backup task is initiated.
oceanbase.CDB_OB_BACKUP_JOB_HISTORY This view displays the historical records of all backup jobs of all tenants in the cluster.
oceanbase.CDB_OB_BACKUP_TASKS This view displays all task-level backup tasks of all tenants in the cluster. A task record corresponds to a backup set. Task records and job records are in a one-to-one correspondence.
oceanbase.CDB_OB_BACKUP_TASK_HISTORY This view displays the historical records of all task-level backup tasks of all tenants in the cluster.
oceanbase.DBA_OB_BACKUP_JOBS This view displays all backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_JOB_HISTORY This view displays the historical records of all backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_TASKS This view displays all task-level backup tasks of the current tenant.
oceanbase.DBA_OB_BACKUP_TASK_HISTORY This view displays the historical records of all task-level backup tasks of the current tenant.
oceanbase.DBA_OB_BACKUP_SET_FILES This view displays the file status of a backup set.
oceanbase.DBA_OB_RESTORE_PROGRESS This view displays the progress of a restore task.
oceanbase.DBA_OB_RESTORE_HISTORY This view displays the status of a completed restore task.
oceanbase.DBA_OB_ARCHIVE_DEST This view displays the archive path configuration.
oceanbase.CDB_OB_ARCHIVE_DEST This view displays the archive path configuration.
oceanbase.CDB_OB_BACKUP_PARAMETER This view displays the backup parameters.
oceanbase.CDB_OB_BACKUP_DELETE_JOBS This view displays the progress of a tenant-level backup cleanup job.
oceanbase.CDB_OB_BACKUP_DELETE_JOB_HISTORY This view displays the history of backup cleanup tasks executed in the tenant.
oceanbase.CDB_OB_BACKUP_DELETE_TASKS This view displays the information about backup_set/backup_piece cleanup tasks being executed in the tenant.
oceanbase.CDB_OB_BACKUP_DELETE_TASK_HISTORY This view displays the history of backup_set/backup_piece cleanup tasks completed in the tenant.
oceanbase.CDB_OB_BACKUP_DELETE_POLICY This view displays the cleanup policies set for expired/automatic cleanup in the tenant.
oceanbase.CDB_OB_BACKUP_STORAGE_INFO This view displays the information about the backup destinations used for backup and restore in the tenant.
oceanbase.CDB_OB_BACKUP_STORAGE_INFO_HISTORY This view displays the history of backup destinations used for backup and restore in the tenant.
oceanbase.DBA_OB_BACKUP_STORAGE_INFO This view displays the information about the backup destinations used for backup and restore in the tenant.
oceanbase.DBA_OB_BACKUP_STORAGE_INFO_HISTORY This view displays the history of backup destinations used for backup and restore in the tenant.
oceanbase.DBA_OB_BACKUP_DELETE_POLICY This view displays the cleanup policies set for expired/automatic cleanup in the tenant.
oceanbase.DBA_OB_BACKUP_DELETE_JOBS This view displays the execution progress of tenant-level backup cleanup jobs.
oceanbase.DBA_OB_BACKUP_DELETE_JOB_HISTORY This view displays the history of backup cleanup tasks executed in the tenant.
oceanbase.DBA_OB_BACKUP_DELETE_TASKS This view displays the information about backup_set/backup_piece cleanup tasks being executed in the tenant.
oceanbase.DBA_OB_BACKUP_DELETE_TASK_HISTORY This view displays the history of backup_set/backup_piece cleanup tasks completed in the tenant.
oceanbase.DBA_OB_ARCHIVELOG This view displays the status of log backups on each path.
oceanbase.DBA_OB_ARCHIVELOG_SUMMARY This view displays the status of all log backups in the history and current.
oceanbase.DBA_OB_ARCHIVELOG_PIECE_FILES This view displays the status of pieces in a backup set.
oceanbase.CDB_OB_ARCHIVELOG This view displays the status of log archiving on each path.
oceanbase.CDB_OB_ARCHIVELOG_SUMMARY This view displays the status of all log archiving in the history and current.
oceanbase.CDB_OB_RECOVER_TABLE_JOBS This view displays information about table-level restore tasks.
oceanbase.DBA_OB_RECOVER_TABLE_JOBS This view displays information about table-level restore tasks.
oceanbase.CDB_OB_IMPORT_TABLE_JOBS This view displays information about import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_JOBS This view displays information about import tasks.
oceanbase.CDB_OB_IMPORT_TABLE_TASKS This view displays records of table-level cross-tenant import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_TASKS This view displays records of table-level import tasks.
oceanbase.CDB_OB_RECOVER_TABLE_JOB_HISTORY This view displays the results of table-level restore tasks.
oceanbase.DBA_OB_RECOVER_TABLE_JOB_HISTORY This view displays the results of table-level restore tasks.
oceanbase.CDB_OB_IMPORT_TABLE_JOB_HISTORY This view displays the results of import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_JOB_HISTORY This view displays the results of import tasks.
oceanbase.CDB_OB_IMPORT_TABLE_TASK_HISTORY This view displays the history records of table-level cross-tenant import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_TASK_HISTORY This view displays the history records of table-level cross-tenant import tasks.

Statistics and histograms

View name Description
oceanbase.DBA_TAB_STATISTICS This view displays the optimizer statistics of all tables in the database.
oceanbase.DBA_TAB_COL_STATISTICS This view displays the column statistics and histogram information of all tables in the database.
oceanbase.DBA_PART_COL_STATISTICS This view displays the column statistics and histogram information of all partitioned tables in the database.
oceanbase.DBA_SUBPART_COL_STATISTICS This view displays the column statistics and histogram information of all subpartitioned tables in the database.
oceanbase.DBA_TAB_HISTOGRAMS This view displays the histograms of all columns in all tables in the database.
oceanbase.DBA_PART_HISTOGRAMS This view displays the histogram data (endpoints) of all partitioned tables in the database.
oceanbase.DBA_SUBPART_HISTOGRAMS This view displays the histogram data (endpoints) of all subpartitioned tables in the database.
oceanbase.DBA_TAB_STATS_HISTORY This view displays the table statistics history of all tables in the database.
oceanbase.DBA_IND_STATISTICS This view displays the optimizer statistics of all indexes in the database.
oceanbase.DBA_TAB_MODIFICATIONS This view displays the cumulative modification information of tables in the database.
oceanbase.CDB_TAB_COL_STATISTICS This view displays the column-level statistics in the system tenant.
oceanbase.DBA_OB_TABLE_OPT_STAT_GATHER_HISTORY This view displays the historical execution status of table statistics collection.

Tenant-related

View name Description
oceanbase.DBA_OBJECTS This view displays all database objects in the database. The view definition is consistent with that of ALL_OBJECTS.
oceanbase.CDB_OBJECTS This view displays the object information of all tenants in the system tenant.
oceanbase.DBA_OB_TENANTS This view displays the basic information of all tenants. The information includes the system tenant, user-created tenants (user tenants), and the Meta tenant. You can distinguish the tenant types based on the TENANT_TYPE column.
oceanbase.DBA_OB_TENANT_JOBS This view displays the task information at the tenant level.
oceanbase.CDB_OB_SYS_VARIABLES This view displays the system variable information of all tenants in the system tenant.

Resource-related views

View name Description
oceanbase.DBA_OB_RESOURCE_POOLS This view displays resource pool information for all tenants.
oceanbase.DBA_OB_UNIT_JOBS This view displays all unit-related tasks.
oceanbase.DBA_OB_UNITS This view displays unit information for all tenants.
oceanbase.DBA_OB_UNIT_CONFIGS This view displays unit specifications for all tenants.
oceanbase.DBA_OB_SEQUENCE_OBJECTS This view displays all SEQUENCE objects in the database.

Resource Manager-related views

View name Description
CDB_OB_RSRC_DIRECTIVES This view displays various resource configuration parameters for all tenants in Resource Manager.

I/O-related statistics

View name Description
CDB_OB_STORAGE_IO_USAGE This view displays various I/O operations for all tenant objects in object storage and cloud disks.

Replica and log-related

View name Description
oceanbase.CDB_OB_CS_REPLICA_STATS This view displays the progress of converting tablets into columnar format in the log stream of C replicas on all OBServer nodes for all tenants.
oceanbase.CDB_OB_LS_LOCATIONS This view displays the distribution of log stream (LS) replicas for all tenants.
oceanbase.CDB_OB_TABLEGROUPS This view displays the metadata of table groups for all tenants under the sys tenant, mainly focusing on partition information.
oceanbase.CDB_OB_TABLEGROUP_PARTITIONS This view displays the primary partition information of partitioned table groups for all tenants under the sys tenant.
oceanbase.CDB_OB_TABLEGROUP_SUBPARTITIONS This view displays the secondary partition information of partitioned table groups for all tenants under the sys tenant.
oceanbase.CDB_OB_TABLET_TO_LS This view displays the list of tablets and their corresponding log stream information for all tenants under the sys tenant.
oceanbase.CDB_OB_TABLET_REPLICAS This view displays all tablet replicas for the current tenant. Each tablet replica is uniquely identified by the composite key: <TENANT_ID, TABLET_ID, SVR_IP, SVR_PORT, LS_ID>.
oceanbase.CDB_PART_KEY_COLUMNS This view displays the primary partition key information of partitioned objects (partitioned tables and indexes) for all tenants.
oceanbase.CDB_SUBPART_KEY_COLUMNS This view displays the secondary partition key information of partitioned objects (partitioned tables and indexes) for all tenants.
oceanbase.DBA_IND_SUBPARTITIONS This view displays information about all index subpartitions in the database.
oceanbase.DBA_OB_TABLEGROUP_PARTITIONS This view displays the primary partition information of partitioned table groups.
oceanbase.DBA_OB_TABLEGROUP_SUBPARTITIONS This view displays the secondary partition information of partitioned table groups.
oceanbase.DBA_OB_TABLEGROUPS This view displays the metadata of table groups, mainly focusing on partition information.
oceanbase.DBA_OB_TABLET_REPLICAS This view displays all tablet replicas for the current tenant. Each tablet replica is uniquely identified by the composite key: <TABLET_ID, SVR_IP, SVR_PORT, LS_ID>.
oceanbase.DBA_OB_TABLET_TO_LS This view displays the list of tablets and their corresponding log stream information for the current tenant.
oceanbase.DBA_OB_LS_LOCATIONS This view displays the distribution of log stream (LS) replicas for the current tenant.
oceanbase.CDB_OB_TABLET_CHECKSUM_ERROR_INFO This view displays information about data inconsistencies between tablet replicas.
oceanbase.CDB_OB_LS This view displays the status and recovery progress of log streams.
oceanbase.DBA_OB_LS This view displays the status and recovery progress of log streams.

WR related

View name Description
oceanbase.CDB_WR_ACTIVE_SESSION_HISTORY This view displays the ASH data of all tenants.
oceanbase.CDB_WR_CONTROL This view displays the WR-related configuration information.
oceanbase.CDB_WR_EVENT_NAME This view displays the tenant-level wait event names of all tenants.
oceanbase.CDB_WR_SNAPSHOT This view displays the SNAPSHOT information of all tenants.
oceanbase.CDB_WR_SQLSTAT This view displays the basic performance statistics of SQL statements executed by all tenants. Each SQL statement is represented as a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
oceanbase.CDB_WR_SQLTEXT This view displays the SQL text collected by WR for all tenants.
oceanbase.CDB_WR_STATNAME This view displays the names of system statistics for all tenants.
oceanbase.CDB_WR_SYS_TIME_MODEL This view displays the WR data of the Time Model statistics for all tenants.
oceanbase.CDB_WR_SYSSTAT This view displays the details of system statistics for all tenants.
oceanbase.CDB_WR_SYSTEM_EVENT This view displays the tenant-level wait event information of all tenants.
oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY This view displays the ASH data of the current tenant.
oceanbase.DBA_WR_CONTROL This view displays the WR-related configuration information.
oceanbase.DBA_WR_EVENT_NAME This view displays the tenant-level wait event names of the current tenant.
oceanbase.DBA_WR_SNAPSHOT This view displays the SNAPSHOT information of the current tenant.
oceanbase.DBA_WR_SQLSTAT This view displays the basic performance statistics of SQL statements executed by the current tenant. Each SQL statement is represented as a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
oceanbase.DBA_WR_SQLTEXT This view displays the SQL text collected by WR for the current tenant.
oceanbase.DBA_WR_STATNAME This view displays the names of system statistics for the current tenant.
oceanbase.DBA_WR_SYS_TIME_MODEL This view displays the WR data of the Time Model statistics for the current tenant.
oceanbase.DBA_WR_SYSSTAT This view displays the details of system statistics for the current tenant.
oceanbase.DBA_WR_SYSTEM_EVENT This view displays the persistent tenant-level wait event information of the current tenant.

Foreign keys

View name Description
information_schema.INNODB_SYS_FOREIGN This view displays metadata information about InnoDB foreign keys. It is equivalent to the SYS_FOREIGN table in the InnoDB data dictionary.

Note

This view is available only for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_FOREIGN_COLS This view displays status information about InnoDB foreign key columns. It is equivalent to the SYS_FOREIGN_COLS table in the InnoDB data dictionary.

Note

This view is available only for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

OBKV

View name Description
oceanbase.CDB_OB_KV_TTL_TASKS This view displays all TTL tasks that are being executed by all tenants in the sys tenant.
oceanbase.CDB_OB_KV_TTL_TASK_HISTORY This view displays all historical TTL tasks of all tenants in the sys tenant.
oceanbase.DBA_OB_KV_TTL_TASKS This view displays all TTL tasks that are being executed by the current tenant.
oceanbase.DBA_OB_KV_TTL_TASK_HISTORY This view displays all historical TTL tasks of the current tenant.
V$OB_KV_CLIENT_INFO This view displays the configuration parameters of all OBKV tenant clients connected to the current node.
GV$OB_KV_CLIENT_INFO This view displays the configuration parameters of all OBKV tenant clients.

Overview of performance views

ASH-related views

View Name Description
GV$ACTIVE_SESSION_HISTORY This view displays the active session history.
V$ACTIVE_SESSION_HISTORY This view displays the active session history.
GV$OB_ACTIVE_SESSION_HISTORY This view displays the active session history for all tenants and all OBServer nodes.
V$OB_ACTIVE_SESSION_HISTORY This view displays the active session history for all tenants and the current OBServer node.

Partition-related views

View Name Description
V$OB_DYNAMIC_PARTITION_TABLES This view displays the dynamic partition table information for all tenants.

Shared storage-related views

View Name Description
GV$OB_STORAGE_CACHE_TASKS This view displays the cache task information for all tenants and all OBServer nodes.
V$OB_STORAGE_CACHE_TASKS This view displays the cache task information for all tenants and the current OBServer node.
GV$OB_TABLET_LOCAL_CACHE This view displays the overall cache information for all tenants and all OBServer nodes.
V$OB_TABLET_LOCAL_CACHE This view displays the overall cache information for all tenants and the current OBServer node.
GV$OB_SERVER_STORAGE This view displays the object storage information for the shared storage cluster on all OBServer nodes.
V$OB_SERVER_STORAGE This view displays the object storage information for the shared storage cluster on the current OBServer node.

Monitoring-related statistics

View Name Description
GV$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information for the DTL intermediate result manager.
V$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information for the DTL intermediate result manager.

I/O-related statistics

View Name Purpose
GV$OB_SHARED_STORAGE_QUOTA This view displays IO access resource information on all OBServer nodes.
V$OB_SHARED_STORAGE_QUOTA This view displays IO access resource information on the current OBServer node.
GV$OB_IO_CALIBRATION_STATUS This view displays the execution status of I/O calibration tasks.
V$OB_IO_CALIBRATION_STATUS This view displays the execution status of I/O calibration tasks.
GV$OB_IO_BENCHMARK This view displays the disk calibration data used by the I/O module.
V$OB_IO_BENCHMARK This view displays the disk calibration data used by the I/O module.

Cache-related statistics

View Name Purpose
GV$OB_SS_LOCAL_CACHE This view displays the relevant metrics of various cache data in the local cache of each OBServer node for all tenants in shared storage mode.
V$OB_SS_LOCAL_CACHE This view displays the relevant metrics of various cache data in the local cache of the current OBServer node for all tenants in shared storage mode.
GV$OB_MEMORY This view displays tenant-level memory statistics.
V$OB_MEMORY This view displays tenant-level memory statistics.
GV$OB_MEMSTORE This view displays the memory usage of MemTables for all tenants on all servers.
V$OB_MEMSTORE This view displays tenant-level MemStore statistics.
GV$OB_MEMSTORE_INFO This view displays detailed information about MemTables for all partitions of all tenants on all servers.
V$OB_MEMSTORE_INFO This view displays detailed information about MemTables for all partitions of all tenants on all servers.
GV$OB_SSTABLES This view displays the SSTable information for tenants.
V$OB_SSTABLES This view displays the SSTable information for tenants.
GV$OB_TENANT_MEMORY This view displays the memory usage of each tenant in the cluster.
V$OB_TENANT_MEMORY This view displays the memory usage of each tenant in the current observer process.

Resource Manager

View Name Purpose
GV$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on all OBServer nodes for all tenants.
GV$OB_FUNCTION_IO_STAT This view displays the I/O statistics at the function level on all OBServer nodes for all tenants.
V$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on the current OBServer node for all tenants.
V$OB_FUNCTION_IO_STAT This view displays the I/O statistics at the function level on the current OBServer node for all tenants.

Event-related statistics

View Name Description
GV$OB_COMPACTION_PROGRESS This view displays the OBServer-level major compaction progress of the tenant.
GV$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
GV$OB_PROCESSLIST This view displays the session information of all OBServer nodes in the tenant.
GV$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
GV$OB_TABLET_COMPACTION_HISTORY This view displays the historical information of tablet-level major compaction.
GV$OB_TABLET_COMPACTION_PROGRESS This view displays the progress of tablet-level major compaction.
GV$OB_TRANSACTION_PARTICIPANTS This view displays the transaction participant information of all OBServer nodes.
GV$SESSION_EVENT This view displays the session-level waiting events of all OBServer nodes in the cluster.
GV$SESSION_WAIT This view displays the current or last waiting events of all sessions on all servers, including the waiting event name and waiting time.
GV$SESSION_WAIT_HISTORY This view displays the information of the last 10 waiting events of all sessions on all servers.
GV$SYSTEM_EVENT This view displays the waiting events of all tenants in the cluster.
GV$SESSTAT This view displays the session-level statistical events of all OBServer nodes.
GV$SYSSTAT This view displays the tenant-level statistical events of all servers.
V$OB_COMPACTION_PROGRESS This view displays the server-level major compaction progress of the tenant.
V$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
V$OB_PROCESSLIST This view displays the session information of the current OBServer node.
V$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
V$OB_TABLET_COMPACTION_HISTORY This view displays the historical information of tablet-level major compaction.
V$OB_TABLET_COMPACTION_PROGRESS This view displays the progress of tablet-level major compaction.
V$OB_TRANSACTION_PARTICIPANTS This view displays transaction participant information on all OBServer nodes.
V$STATNAME This view displays the definitions of all statistics events.
V$EVENT_NAME This view displays the definitions of all statistics events on the current OBServer node.
V$SESSION_WAIT This view displays the details of the current waiting events for each session. Each waiting event has three parameters, which record the corresponding values.
V$SESSION_WAIT_HISTORY This view displays the details of the current waiting events for each session, including the last 10 waiting events.
V$SESSTAT This view displays the statistics events at the session level.
V$SYSSTAT This view displays the statistics events at the tenant level on the current server.
V$SYSTEM_EVENT This view displays the statistics events at the tenant level.
GV$SESSION_LONGOPS This view displays the execution status and progress of DDL operations in the cluster.
V$SESSION_LONGOPS This view displays the execution status and progress of DDL operations on the current OBServer node.

SQL-related statistics

View name Description
GV$OB_PLAN_CACHE_STAT This view displays the overall status of each plan cache on all OBServer nodes for the current tenant.
V$OB_PLAN_CACHE_STAT This view records the overall status of each plan cache on all servers for the current tenant.
GV$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache on all servers for the current tenant.
V$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache on the current server for the current tenant.
GV$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache on all servers.
V$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache on the current server.
GV$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
V$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
GV$OB_PS_ITEM_INFO This view provides monitoring functionality for prepared statements, containing basic information about all prepared statements in the PS cache.
V$OB_PS_ITEM_INFO This view provides monitoring functionality for prepared statements, containing basic information about all prepared statements in the PS cache.
GV$OB_PX_P2P_DATAHUB This view displays information about data transfer operations during parallel execution.
GV$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on all OBServer nodes.
V$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on the OBServer node.
GV$OB_SQL_AUDIT This view displays statistics such as the source and execution status of each SQL request on all servers.
V$OB_SQL_AUDIT This view displays statistics such as the source and execution status of each SQL request on the current server.
GV$SQL_PLAN_MONITOR This view displays statistics on the plan level for slow queries on all OBServer nodes. Each slow query has a corresponding statistics record, and the trace information of the plan is also recorded.
V$SQL_PLAN_MONITOR This view displays statistics on the operation level for slow queries. Each operation has a corresponding statistics record.
V$SQL_MONITOR_STATNAME This view displays the meaning of the numbers in the OTHERSTAT_X_ID column of GV$SQL_PLAN_MONITOR.
GV$OB_FLT_TRACE_CONFIG This view displays the diagnostic information of full-link tracing.

Statistics related to logs

View name Description
GV$OB_LOG_STAT This view displays the status of Palf.
GV$OB_LS_SNAPSHOTS This view displays the information about log stream snapshots stored in the persistent storage of all units.
V$OB_LOG_STAT This view displays the status of Palf.

Statistics related to network

View name Description
GV$OB_RPC_OUTGOING This view displays the statistics about RPCs sent from all OBServer nodes.
GV$OB_RPC_INCOMING This view displays the statistics about RPCs received by all OBServer nodes.
V$OB_RPC_OUTGOING This view displays the statistics about the RPC data sent from all tenants on OBServer nodes.
V$OB_RPC_INCOMING This view displays the statistics about the RPC data received by all tenants on OBServer nodes.

Session-related views

View name Description
GV$OB_SESSION This view records the session information created on all servers.

Database-related statistics

View Description
GV$OB_KVCACHE This view displays the KVCACHE information on all OBServer nodes.
GV$OB_PARAMETERS This view displays the configuration information on all OBServer nodes where the tenant is located.
GV$OB_SERVER_SCHEMA_INFO This view displays the schema information on all servers.
GV$OB_SERVERS This view displays the information about all OBServer nodes.
GV$OB_UNITS This view displays the unit information of the OBServer node where the tenant is located. The system tenant can view the unit information of all OBServer nodes in the cluster.
V$OB_KVCACHE This view displays the KVCACHE information on all OBServer nodes.
V$OB_PARAMETERS This view displays the configuration information on the OBServer node.
V$OB_SERVER_SCHEMA_INFO This view displays the schema information on all servers.
V$OB_SERVERS This view displays the information about the OBServer node.
V$OB_UNITS This view displays the unit information of the OBServer node.
GV$DML_STATS This view displays the DML information in the current user table.
V$DML_STATS This view displays the DML information in the current user table.
V$OB_COMPATIBILITY_CONTROL This view displays the features that can be controlled for compatibility with the OceanBase Database release.

Dump-related statistics

View Description
GV$OB_MERGE_INFO This view displays the statistics about completed compactions in the OceanBase cluster.
V$OB_MERGE_INFO This view displays the statistics about completed compactions in the OceanBase cluster.

Thread-related statistics

View Description
GV$OB_PX_WORKER_STAT In parallel execution scenarios, this view displays the execution information of each thread.
V$OB_PX_WORKER_STAT In parallel execution scenarios, this view displays the execution information of each thread.
GV$OB_TENANT_RUNTIME_INFO This view displays the information about queues and thread limits in tenant threads.
V$OB_TENANT_RUNTIME_INFO This view displays the information about queues and thread limits in tenant threads.

Statistics related to workarea

View name Purpose
GV$SQL_WORKAREA This view displays the workarea statistics of all operators that were previously managed by SQL automatic memory management.
GV$SQL_WORKAREA_ACTIVE This view displays the workarea information of the active operator.
GV$SQL_WORKAREA_HISTOGRAM This view displays the statistics of all previous workarea executions, such as the number of times full in-memory processing occurred between 1 M and 2 M, and the number of one-pass operations.
GV$OB_SQL_WORKAREA_MEMORY_INFO This view queries some overall information about the SQL workarea, such as the maximum available memory, current used memory, and current held memory.
V$SQL_WORKAREA This view displays the workarea statistics of all operators that were previously managed by SQL automatic memory management.
V$SQL_WORKAREA_ACTIVE This view displays the workarea information of the active operator.
V$SQL_WORKAREA_HISTOGRAM This view displays the statistics of all previous workarea executions, such as the number of times full in-memory processing occurred between 1 M and 2 M, and the number of one-pass operations.
V$OB_SQL_WORKAREA_MEMORY_INFO This view queries some overall information about the SQL workarea, including the maximum available memory, current used memory, and current held memory.

WR related

View name Description
GV$OB_QUERY_RESPONSE_TIME_HISTOGRAM This view displays the histogram information of Query execution time on all nodes for all tenants.
GV$OB_RES_MGR_SYSSTAT This view displays the statistics of resource groups on all OBServer nodes for all tenants.
GV$OB_SESS_TIME_MODEL This view displays the session-level Time Model statistics in the cluster.
GV$OB_SQLSTAT This view displays the basic performance statistics of SQL statements in the cluster. Each SQL statement is a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
GV$OB_SYS_TIME_MODEL This view displays the tenant-level Time Model statistics in the cluster.
V$OB_QUERY_RESPONSE_TIME_HISTOGRAM This view displays the histogram information of Query execution time on the current node for all tenants.
V$OB_RES_MGR_SYSSTAT This view displays the statistics of resource groups on the current OBServer node for all tenants.
V$OB_SESS_TIME_MODEL This view displays the session-level Time Model statistics on the current node.
V$OB_SQLSTAT This view displays the basic performance statistics of SQL statements on the current node. Each SQL statement is a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
V$OB_SYS_TIME_MODEL This view displays the tenant-level Time Model statistics on the current node.

Statistics related to encrypted tables

View name Description
V$OB_ENCRYPTED_TABLES This view displays the encryption status of tables with encryption enabled.
V$ENCRYPTED_TABLESPACES This view displays the encryption status of tablespaces with encryption enabled.

Statistics related to transactions

View name Description
GV$LATCH This view displays the Latch information of all OBServer nodes in the cluster.
V$LATCH This view displays the Latch information of all OBServer nodes in the cluster.

Views in a MySQL tenant

Dictionary views overview

Help commands

View name Description
mysql.help_topic This view, together with the mysql.help_category, mysql.help_relation, and mysql.help_keyword views, generates help commands.
mysql.help_category This view, together with the mysql.help_relation, mysql.help_topic, and mysql.help_keyword views, generates help commands.
mysql.help_keyword This view, together with the mysql.help_relation, mysql.help_topic, and mysql.help_category views, generates help commands.
mysql.help_relation This view, together with the mysql.help_category, mysql.help_topic, and mysql.help_keyword views, generates help commands.

SPM-related views

View name Description
oceanbase.DBA_SQL_PLAN_BASELINES This view displays the plan baselines of SQL statements in SPM.
oceanbase.DBA_SQL_MANAGEMENT_CONFIG This view displays the configuration parameters in SPM.

Privilege-related views

View name Description
mysql.db This view displays the database-level privileges (VIRTUAL_TABLE).
mysql.user This view records the user-level privileges (VIRTUAL_TABLE).
information_schema.COLUMN_PRIVILEGES This view displays the column privileges.
information_schema.SCHEMA_PRIVILEGES This view describes the database privileges.
information_schema.TABLE_PRIVILEGES This view records the table privileges.
information_schema.USER_PRIVILEGES This view records the user privileges.

OBKV-related views

View name Description
oceanbase.DBA_OB_KV_TTL_TASKS This view displays the TTL tasks that are being executed by the current tenant.
oceanbase.DBA_OB_KV_TTL_TASK_HISTORY This view displays the historical TTL tasks of the current tenant.
V$OB_KV_CLIENT_INFO This view displays the configuration parameters of the client connections to the OBKV tenant on the current node.
GV$OB_KV_CLIENT_INFO This view displays the configuration parameters of the client connections to the OBKV tenant.

Scheduler

View name Description
oceanbase.DBA_SCHEDULER_JOBS This view displays the information about all scheduler jobs in the database.

Storage-related

View Name Description
mysql.proc This view displays information about stored procedures.
information_schema.ENGINES This view records information about storage engines.
information_schema.PARAMETERS This view provides information about stored procedure parameters and return values.
information_schema.ROUTINES This view provides information about stored procedures.

Time zone-related

View Name Description
mysql.time_zone This view displays information about time zones (SYSTEM_VIEW).
mysql.time_zone_name This view records the names of time zones (SYSTEM_VIEW).
mysql.time_zone_transition mysql.time_zone_transition is a system view that records information about time zone transitions.
mysql.time_zone_transition_type This view records information about time zone transition types (SYSTEM_VIEW).

Character set

View Name Description
information_schema.CHARACTER_SETS This view records information about character sets in OceanBase Database.
information_schema.COLLATIONS This view records information about collation methods for each character set.
information_schema.COLLATION_CHARACTER_SET_APPLICABILITY This view records the correspondence between character sets and collations.

Tables and columns

View name Description
information_schema.COLUMNS Records column information.
information_schema.STATISTICS Records table index information.
information_schema.TABLES Records table information.
information_schema.VIEWS Records view information.
information_schema.VIEW_TABLE_USAGE Displays information about tables and views used in the view definition.
oceanbase.DBA_OB_TABLEGROUP_TABLES Displays the association between a tablegroup and a table. Tables not in a tablegroup are not displayed.
oceanbase.DBA_PART_KEY_COLUMNS Displays columns in the partitioning key of all partition objects in the database.
oceanbase.DBA_SUBPART_KEY_COLUMNS Displays columns in the subpartitioning key of all partition objects in the database.
oceanbase.DBA_OB_TABLE_LOCATIONS Displays the location of a table or partition, including system tables, user tables, and index tables.
information_schema.TABLESPACES Information about tablespaces.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can query only the table structure.

Materialized view-related views

View Purpose
oceanbase.DBA_MVIEW_DEPS This view displays the dependencies of materialized views in the current tenant.
oceanbase.DBA_MVIEW_LOGS This view displays the logs of materialized views.
oceanbase.DBA_MVIEW_RUNNING_JOBS This view displays the running materialized view-related tasks, including refresh tasks and MLOG cleanup tasks, in the current tenant.
oceanbase.DBA_MVIEWS This view displays the information of all materialized views.
oceanbase.DBA_MVREF_CHANGE_STATS This view displays the statistics related to materialized view refreshes.
oceanbase.DBA_MVREF_RUN_STATS This view displays the information about each refresh run of a materialized view. Each refresh run is identified by a REFRESH_ID.
oceanbase.DBA_MVREF_STATS This view displays the basic timing statistics of materialized view refreshes.
oceanbase.DBA_MVREF_STATS_PARAMS This view displays the refresh statistics attributes associated with each materialized view.
oceanbase.DBA_MVREF_STATS_SYS_DEFAULTS This view displays the system-level default values of the refresh statistics attributes.
oceanbase.DBA_MVREF_STMT_STATS This view displays the information about the refresh statements.

InnoDB storage engine

View name Description
information_schema.INNODB_LOCK_WAITS This view displays information about lock transactions and lock objects that are waiting for lock conflicts.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_LOCKS This view displays information about all current locks (waiting and held).

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.NDB_TRANSID_MYSQL_CONNECTION_MAP This view displays the mapping relationship between NDB transactions, NDB transaction coordinators, and MySQL servers that are attached as API nodes to the NDB cluster.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_TRX This view displays information about active transactions.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_BUFFER_PAGE This view displays information about all cached pages in the buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_BUFFER_PAGE_LRU This view displays the LRU-sorted information about pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_BUFFER_POOL_STATS This view displays statistics about the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMP This view displays the operation status of InnoDB tables that are compressed.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMP_PER_INDEX This view displays information about operations on InnoDB tables and indexes that are compressed.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMP_PER_INDEX_RESET This view displays the operation reset time of InnoDB tables and indexes that are compressed.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMP_RESET This view displays the operation status of InnoDB tables that are compressed.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMPMEM This view displays the status of compressed pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_CMPMEM_RESET This view displays the reset time of compressed pages in the InnoDB buffer pool.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_DATAFILES This view displays the data file paths of InnoDB files for each table and general tablespace.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_INDEXES This view displays metadata about InnoDB indexes.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_TABLES This view displays metadata about InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_TABLESPACES This view displays metadata about InnoDB table files and general tablespaces.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_TABLESTATS This view displays low-level status information about InnoDB tables.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_SYS_VIRTUAL This view displays metadata about InnoDB virtual generated columns.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_TEMP_TABLE_INFO This view displays information about active InnoDB temporary tables created by users.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

information_schema.INNODB_METRICS This view displays InnoDB performance information.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported. You can only query the table structure.

Outline

View name Description
oceanbase.DBA_OB_OUTLINES This view displays the execution plan outline information of the current tenant.
oceanbase.DBA_OB_CONCURRENT_LIMIT_SQL This view displays the outline information related to the throttling rules of the current tenant.
oceanbase.DBA_OB_OUTLINE_CONCURRENT_HISTORY This view displays the outline information of the execution plan and throttling rules of the current tenant.
DBA_OB_FORMAT_OUTLINES This view records the details of the current tenant's format outline.

Database basic information

View name Description
information_schema.GLOBAL_STATUS This view records the global status information of OceanBase Database.
information_schema.GLOBAL_VARIABLES This view records the global variable information.
information_schema.SCHEMATA This view records the database metadata.
oceanbase.DBA_OB_DATABASES This view displays the database metadata of the current tenant.
oceanbase.DBA_OB_MAJOR_COMPACTION This view displays the global information of the current tenant.
oceanbase.DBA_OB_ZONE_MAJOR_COMPACTION This view displays the information of major compactions in each zone of the current tenant.
oceanbase.DBA_OB_FREEZE_INFO This view displays the version information generated by major freeze.
information_schema.events This view records all event information.

Partition-related views

View name Description
information_schema.PARTITIONS Records partition information.
oceanbase.DBA_IND_PARTITIONS Displays the information about the primary partitions of an index.
oceanbase.DBA_OB_DYNAMIC_PARTITION_TABLES Displays the information about dynamic partition tables in the current tenant.
oceanbase.DBA_PART_INDEXES Displays the information about all partition indexes.
oceanbase.DBA_PART_TABLES Displays the information about user table partitions.
oceanbase.DBA_TAB_PARTITIONS Displays the information about the multi-level partitions, storage parameters, and statistics of the partitions that the current user can access.
oceanbase.DBA_TAB_SUBPARTITIONS Displays the information about subpartitions, including the subpartition name, table name, partition name, storage attributes, and statistics generated by the DBMS_STATS package.
oceanbase.DBA_SUBPARTITION_TEMPLATES Displays the information about all subpartition templates.

Load balancing-related views

View name Description
oceanbase.DBA_OB_TRANSFER_PARTITION_TASKS Displays the information about the transfer partition tasks that are being processed in the current tenant.
oceanbase.DBA_OB_TRANSFER_PARTITION_TASK_HISTORY Displays the information about the transfer partition tasks that have been executed in the current tenant.

Thread-related views

View name Description
information_schema.PROCESSLIST Displays the information about running threads.

Constraints

View name Description
information_schema.CHECK_CONSTRAINTS Displays the constraint information about tables and columns during the CREATE TABLE operation.
information_schema.KEY_COLUMN_USAGE Records the constraint information about keys in a column.
information_schema.REFERENTIAL_CONSTRAINTS Displays the metadata about foreign key constraints.
information_schema.TABLE_CONSTRAINTS Describes the information about table constraints.

Full-text index related

View name Description
information_schema.INNODB_FT_BEING_DELETED This view displays information about full-text indexes that are being deleted.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_FT_CONFIG This view displays the configuration information of the InnoDB full-text search engine.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_FT_DELETED This view displays information about full-text indexes that have been marked for deletion.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_FT_INDEX_CACHE This view displays the cache status information of InnoDB full-text indexes.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

information_schema.INNODB_SYS_FIELDS This view displays the metadata information of key columns (fields) of InnoDB indexes, which is equivalent to the information in the SYS_FIELDS table of the InnoDB data dictionary.

Note

This view is only used for compatibility with MySQL 5.7. The related features are not supported, and you can only query the table structure.

Session related

View name Description
information_schema.SESSION_STATUS This view records the status information of a session, such as the number of active connections and the database uptime.
information_schema.SESSION_VARIABLES This view records the variable information of a session.
oceanbase.DBA_OB_DEADLOCK_EVENT_HISTORY This view displays the history of deadlock events. In non-root tenants, this view displays the history of deadlock events for the tenant.

User login related

View name Description
information_schema.CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS This view displays the number of failed login attempts for different users.

Backup and restore

View Name Description
oceanbase.DBA_OB_BACKUP_JOBS This view displays the backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_JOB_HISTORY This view displays the history of the backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_TASKS This view displays the history of the backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_TASK_HISTORY This view displays the history of the task-level backup jobs of the current tenant.
oceanbase.DBA_OB_BACKUP_SET_FILES This view displays the status of the files in the backup set.
oceanbase.DBA_OB_RESTORE_PROGRESS This view displays the progress of the ongoing restore task.
oceanbase.DBA_OB_RESTORE_HISTORY This view displays the history of the completed restore tasks.
oceanbase.DBA_OB_ARCHIVE_DEST This view displays the archive path configuration.
oceanbase.DBA_OB_BACKUP_STORAGE_INFO This view displays the information about the backup destination used for backup and restore in the current tenant.
oceanbase.DBA_OB_BACKUP_STORAGE_INFO_HISTORY This view displays the history of the information about the backup destination used for backup and restore in the current tenant.
oceanbase.DBA_OB_BACKUP_DELETE_POLICY This view displays the deletion policy set for the tenant for expired or automatic deletion.
oceanbase.DBA_OB_BACKUP_DELETE_JOBS This view displays the execution progress of the tenant-level backup deletion jobs.
oceanbase.DBA_OB_BACKUP_DELETE_JOB_HISTORY This view displays the history of the backup deletion jobs executed in the current tenant.
oceanbase.DBA_OB_BACKUP_DELETE_TASKS This view displays the information about the backup_set/backup_piece deletion tasks being executed in the current tenant.
oceanbase.DBA_OB_BACKUP_DELETE_TASK_HISTORY This view displays the history of the backup_set/backup_piece deletion tasks completed in the current tenant.
oceanbase.DBA_OB_ARCHIVELOG This view displays the status of the log backups on each path.
oceanbase.DBA_OB_ARCHIVELOG_SUMMARY This view displays the status of all log backups in the history and current.
oceanbase.DBA_OB_ARCHIVELOG_PIECE_FILES This view displays the status of the pieces in the backup set.
oceanbase.DBA_OB_RECOVER_TABLE_JOBS This view displays information about table-level recovery tasks.
oceanbase.DBA_OB_IMPORT_TABLE_JOBS This view displays information about import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_TASKS This view displays records of table-level import tasks.
oceanbase.DBA_OB_RECOVER_TABLE_JOB_HISTORY This view displays the results of table-level recovery tasks.
oceanbase.DBA_OB_IMPORT_TABLE_JOB_HISTORY This view displays the results of import tasks.
oceanbase.DBA_OB_IMPORT_TABLE_TASK_HISTORY This view displays the history of cross-tenant table-level import tasks.

Statistics and histograms

View name Description
oceanbase.DBA_TAB_STATISTICS This view displays the optimizer statistics of all tables in the database.
oceanbase.DBA_TAB_COL_STATISTICS This view displays the column statistics and histogram information of all tables in the database.
oceanbase.DBA_PART_COL_STATISTICS This view displays the column statistics and histogram information of all partitioned tables in the database.
oceanbase.DBA_SUBPART_COL_STATISTICS This view displays the column statistics and histogram information of all subpartitioned tables in the database.
oceanbase.DBA_TAB_HISTOGRAMS This view displays the histograms of all columns in all tables in the database.
oceanbase.DBA_PART_HISTOGRAMS This view displays the histogram data (endpoints) of all partitioned tables in the database.
oceanbase.DBA_SUBPART_HISTOGRAMS This view displays the histogram data (endpoints) of all subpartitioned tables in the database.
oceanbase.DBA_TAB_STATS_HISTORY This view displays the table statistics history of all tables in the database.
oceanbase.DBA_IND_STATISTICS This view displays the optimizer statistics of all indexes in the database.
oceanbase.DBA_TAB_MODIFICATIONS This view displays the cumulative modification information of tables in the database.
information_schema.QUERY_RESPONSE_TIME This view displays the histogram data (such as response time) for Prometheus monitoring.
oceanbase.DBA_OB_TABLE_OPT_STAT_GATHER_HISTORY This view displays the historical execution information of statistics collection.

Tenant-related

View name Description
oceanbase.DBA_OBJECTS This view displays all database objects in the database. The view definition is consistent with that of ALL_OBJECTS.
oceanbase.DBA_OB_TENANTS This view displays the basic information of all tenants. The tenants include the sys tenant, user-created tenants (user tenants), and the meta tenant. You can use the TENANT_TYPE column to distinguish the types of tenants.

Resource-related

View name Description
oceanbase.DBA_OB_SEQUENCE_OBJECTS This view displays all SEQUENCEs in the database.

Resource Manager-related

View name Purpose
DBA_OB_RSRC_DIRECTIVES This view displays the resource configuration parameters of the current tenant in Resource Manager.
DBA_OB_RSRC_IO_DIRECTIVES This view displays the IO resource configuration of the current tenant in Resource Manager.
DBA_RSRC_GROUP_MAPPINGS This view displays the binding relationship between users and resource groups.
DBA_RSRC_CONSUMER_GROUPS This view displays the information of all resource groups in the database.
DBA_RSRC_PLANS This view displays all resource management plans defined by the system.
DBA_RSRC_PLAN_DIRECTIVES This view displays the detailed information of each resource plan directive in the database.

I/O-related statistics

View name Purpose
DBA_OB_STORAGE_IO_USAGE This view displays the I/O operations of the current tenant for object storage and cloud disks.

Replica and log-related

View name Purpose
oceanbase.DBA_OB_CS_REPLICA_STATS This view displays the progress of converting tablets to columnar storage in the log stream of C replicas on each OBServer node of the current tenant.
oceanbase.DBA_IND_SUBPARTITIONS This view displays the information of all index subpartitions in the database.
oceanbase.DBA_OB_TABLEGROUP_PARTITIONS This view displays the primary partitions of a partitioned table group.
oceanbase.DBA_OB_TABLEGROUP_SUBPARTITIONS This view displays the secondary partitions of a partitioned table group.
oceanbase.DBA_OB_TABLEGROUPS This view displays the metadata of a table group, mainly the partition information of the table group.
oceanbase.DBA_OB_TABLET_REPLICAS This view displays all tablet replicas of the current tenant. Each tablet replica is uniquely identified by the joint key: <TABLET_ID, SVR_IP, SVR_PORT, LS_ID>.
oceanbase.DBA_OB_TABLET_TO_LS This view displays the list of all tablets of the current tenant and the log stream information to which each tablet belongs.
oceanbase.DBA_OB_LS_LOCATIONS This view displays the replica distribution information of log streams (LS) of the current tenant.

WR-related

View name Purpose
oceanbase.DBA_WR_SNAPSHOT This view displays the SNAPSHOT information of the current tenant.
oceanbase.DBA_WR_ACTIVE_SESSION_HISTORY This view displays the ASH data of the current tenant.
oceanbase.DBA_WR_STATNAME This view displays the names of the system statistics of the current tenant.
oceanbase.DBA_WR_SYSSTAT This view displays the details of the system statistics of the current tenant.
oceanbase.DBA_WR_CONTROL This view displays the WR-related configuration information.
oceanbase.DBA_WR_SYSTEM_EVENT This view displays the tenant-level wait event information of the current tenant.
oceanbase.DBA_WR_EVENT_NAME This view displays the tenant-level wait event names of the current tenant.
oceanbase.DBA_WR_SQLTEXT This view displays the SQL text collected by WR of the current tenant.
oceanbase.DBA_WR_SQLSTAT This view displays the basic performance statistics of the SQL statements executed by the current tenant. Each SQL statement is displayed as a row (that is, each unique combination of SQL_ID and Plan_Hash is displayed as a row).
oceanbase.DBA_WR_SYS_TIME_MODEL This view displays the WR data of the Time Model statistics of the current tenant.

Foreign key-related

View name Purpose
information_schema.INNODB_SYS_FOREIGN This view displays the metadata information about InnoDB foreign keys, which is equivalent to the information in the SYS_FOREIGN table of the InnoDB data dictionary.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

information_schema.INNODB_SYS_FOREIGN_COLS This view displays the status information about InnoDB foreign key columns, which is equivalent to the information in the SYS_FOREIGN_COLS table of the InnoDB data dictionary.

Note

This view is available only for compatibility with MySQL 5.7. You can query only the table structure.

Overview of performance views

ASH related

View name Purpose
GV$ACTIVE_SESSION_HISTORY Displays the active session history.
V$ACTIVE_SESSION_HISTORY Displays the active session history.
V$OB_ACTIVE_SESSION_HISTORY Displays the active session history of the current OBServer node in the current tenant.
GV$OB_ACTIVE_SESSION_HISTORY Displays the active session history of all OBServer nodes in the current tenant.

Partitioning related

View name Purpose
V$OB_DYNAMIC_PARTITION_TABLES Displays the dynamic partition tables of the current tenant.

Shared storage related

View name Purpose
GV$OB_STORAGE_CACHE_TASKS Displays the cache tasks of the current tenant on all OBServer nodes.
V$OB_STORAGE_CACHE_TASKS Displays the cache tasks of the current tenant on the current OBServer node.
GV$OB_TABLET_LOCAL_CACHE Displays the overall cache status of the current tenant on all OBServer nodes.
V$OB_TABLET_LOCAL_CACHE Displays the overall cache status of the current tenant on the current OBServer node.

Event-related statistics

View name Description
GV$OB_COMPACTION_PROGRESS This view displays the OBServer-level major compaction progress of a tenant.
GV$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
GV$OB_PROCESSLIST This view displays the session information of all OBServer nodes where the tenant resides.
GV$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
GV$OB_TABLET_COMPACTION_HISTORY This view displays the historical information about tablet-level major compactions.
GV$OB_TABLET_COMPACTION_PROGRESS This view displays the progress of tablet-level major compactions.
GV$OB_TRANSACTION_PARTICIPANTS This view displays the transaction participant information on all OBServer nodes.
GV$SESSION_EVENT This view displays the session-level waiting events on all OBServer nodes in the cluster.
GV$SESSION_WAIT This view displays the information about the current or last waiting events of all sessions on all servers, including the waiting event name and waiting duration.
GV$SESSION_WAIT_HISTORY This view displays the information about the last 10 waiting events of all sessions on all servers.
GV$SYSTEM_EVENT This view displays the waiting events at the tenant level in the cluster.
GV$SESSTAT This view displays the session-level statistical events on all OBServer nodes.
GV$SYSSTAT This view displays the tenant-level statistical events on all servers.
V$OB_COMPACTION_PROGRESS This view displays the server-level major compaction progress of a tenant.
V$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
V$OB_PROCESSLIST This view displays the session information of the current OBServer node.
V$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
V$OB_TABLET_COMPACTION_HISTORY This view displays the historical information about tablet-level major compactions.
V$OB_TABLET_COMPACTION_PROGRESS This view displays the progress of tablet-level major compactions.
V$OB_TRANSACTION_PARTICIPANTS This view displays the transaction participants on all OBServer nodes.
V$STATNAME This view displays the definitions of all statistical events.
V$EVENT_NAME This view displays the definitions of all statistical events on the current OBServer node.
V$SESSION_WAIT This view displays the details of the current waiting events for each session. Each waiting event has three parameters, which record the corresponding values.
V$SESSION_WAIT_HISTORY This view displays the details of the current waiting events for each session, including the last 10 waiting events.
V$SESSTAT This view displays the statistical events at the session level.
V$SYSSTAT This view displays the statistical events at the tenant level on the current server.
V$SYSTEM_EVENT This view displays the waiting events at the tenant level.
GV$SESSION_LONGOPS This view displays the execution status and progress of DDL operations in the cluster.
V$SESSION_LONGOPS This view displays the execution status and progress of DDL operations on the current OBServer node.

Statistics related to monitoring

View Name Purpose
GV$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information of the DTL intermediate result manager.
V$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information of the DTL intermediate result manager.

Statistics related to I/O

View Name Purpose
GV$OB_SHARED_STORAGE_QUOTA This view displays the I/O access resource information on all OBServer nodes.
V$OB_SHARED_STORAGE_QUOTA This view displays the I/O access resource information on the current OBServer node.

Statistics related to caching

View Name Purpose
GV$OB_SS_LOCAL_CACHE This view displays the relevant metrics of various cache data in the local cache of each OBServer node for all tenants in shared storage mode.
V$OB_SS_LOCAL_CACHE This view displays the relevant metrics of various cache data in the local cache of the current OBServer node for all tenants in shared storage mode.
GV$OB_MEMORY This view displays the memory statistics at the tenant level.
V$OB_MEMORY This view displays the memory statistics at the tenant level.
GV$OB_MEMSTORE This view displays the memory usage of MemTables for all tenants on all servers.
V$OB_MEMSTORE This view displays the MemStore statistics at the tenant level.
GV$OB_MEMSTORE_INFO This view displays the detailed information of MemTables for all partitions of all tenants on all servers.
V$OB_MEMSTORE_INFO This view displays the detailed information of MemTables for all partitions of all tenants on all servers.
GV$OB_SSTABLES This view displays the SSTable information of a tenant.
V$OB_SSTABLES This view displays the SSTable information of a tenant.
GV$OB_TENANT_MEMORY This view displays the memory usage of each tenant in the cluster.
V$OB_TENANT_MEMORY This view displays the memory usage of each tenant in the current observer process.

Resource Manager

View Name Purpose
GV$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on all OBServer nodes in the current tenant.
GV$OB_FUNCTION_IO_STAT This view displays the Function-level I/O statistics on all OBServer nodes in the current tenant.
V$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on the current OBServer node in the current tenant.
V$OB_FUNCTION_IO_STAT This view displays the Function-level I/O statistics on the current OBServer node in the current tenant.

SQL-related statistics

View name Description
GV$OB_PLAN_CACHE_STAT This view displays the overall status of each plan cache on all OBServer nodes for the current tenant.
V$OB_PLAN_CACHE_STAT This view records the overall status of each plan cache on all servers for the current tenant.
GV$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache on all servers for the current tenant.
V$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache on the current server for the current tenant.
GV$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache on all servers.
V$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache on the current server.
GV$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
V$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
GV$OB_PS_ITEM_INFO This view provides monitoring functionality for prepared statements, containing basic information about all prepared statements in the PS cache.
V$OB_PS_ITEM_INFO This view provides monitoring functionality for prepared statements, containing basic information about all prepared statements in the PS cache.
GV$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on all OBServer nodes.
V$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on the OBServer node.
GV$OB_SQL_AUDIT This view displays the statistics of each SQL request on all servers, including the source and execution status.
V$OB_SQL_AUDIT This view displays the statistics of each SQL request on the current server, including the source and execution status.
GV$SQL_PLAN_MONITOR This view displays the plan-level statistics of slow queries on all OBServer nodes. Each slow query has a corresponding statistic, and the trace information of the plan is recorded.
V$SQL_PLAN_MONITOR This view displays the operation-level statistics of slow queries. Each operation has a corresponding statistic.
V$SQL_MONITOR_STATNAME This view displays the meaning of the numbers in the OTHERSTAT_X_ID field of GV$SQL_PLAN_MONITOR.
GV$OB_FLT_TRACE_CONFIG This view displays the diagnostic information of end-to-end tracing.

Log-related statistics

View name Purpose
GV$OB_LOG_STAT This view displays the status of Palf.
V$OB_LOG_STAT This view displays the status of Palf.

Network-related statistics

View name Purpose
GV$OB_RPC_OUTGOING This view displays the statistics of RPC sent by all OBServer nodes.
GV$OB_RPC_INCOMING This view displays the statistics of RPC received by all OBServer nodes.
V$OB_RPC_OUTGOING This view displays the statistics of RPC sent by different tenants on different OBServer nodes.
V$OB_RPC_INCOMING This view displays the statistics of RPC received by different tenants on different OBServer nodes.

Database-related statistics

View name Purpose
GV$OB_KVCACHE This view displays the KVCACHE information on each OBServer node.
GV$OB_PARAMETERS This view displays the configuration information on all OBServer nodes where the tenant resides.
GV$OB_SERVER_SCHEMA_INFO This view displays the schema information on all servers.
GV$OB_UNITS This view displays the unit information on the OBServer node where the tenant resides. The system tenant can view the unit information on all OBServer nodes in the cluster.
V$OB_KVCACHE This view displays the KVCACHE information on each OBServer node.
V$OB_PARAMETERS This view displays the configuration information on the OBServer node.
V$OB_SERVER_SCHEMA_INFO This view displays the schema information on all servers.
V$OB_UNITS This view displays the unit information on the OBServer node.
GV$DML_STATS This view displays the DML information in the current user table.
V$DML_STATS This view displays the DML information in the current user table.
V$OB_COMPATIBILITY_CONTROL This view displays the features that can be controlled for compatibility with the OceanBase Database release.

Statistics related to dumps

View name Description
GV$OB_MERGE_INFO This view displays statistics related to completed major compactions in the OceanBase cluster.
V$OB_MERGE_INFO This view displays statistics related to completed major compactions in the OceanBase cluster.

Statistics related to threads

View name Description
GV$OB_PX_WORKER_STAT In parallel execution scenarios, this view displays the execution information of each thread.
V$OB_PX_WORKER_STAT In parallel execution scenarios, this view displays the execution information of each thread.

Statistics related to workareas

View name Description
GV$SQL_WORKAREA This view displays the workarea statistics of all operators executed under SQL automatic memory management.
GV$SQL_WORKAREA_ACTIVE This view displays the workarea information of the currently active operators.
GV$SQL_WORKAREA_HISTOGRAM This view displays the statistics of all workarea executions, such as the number of times full in-memory processing occurred between 1 M and 2 M, and the number of one-pass operations.
GV$OB_SQL_WORKAREA_MEMORY_INFO This view displays some overall information about the SQL workarea, such as the maximum available memory, current used memory, and current held memory.
V$SQL_WORKAREA This view displays the workarea statistics of all operators executed under SQL automatic memory management.
V$SQL_WORKAREA_ACTIVE This view displays the workarea information of the currently active operators.
V$SQL_WORKAREA_HISTOGRAM This view displays the statistics of all workarea executions, such as the number of times full in-memory processing occurred between 1 M and 2 M, and the number of one-pass operations.
V$OB_SQL_WORKAREA_MEMORY_INFO This view displays some overall information about the SQL workarea, including the maximum available memory, current used memory, and current held memory.

WR-related

View Name Description
GV$OB_QUERY_RESPONSE_TIME_HISTOGRAM This view is available starting with OceanBase Database V2.1.
GV$OB_RES_MGR_SYSSTAT This view is available starting with OceanBase Database V2.1.
GV$OB_SQLSTAT This view is available starting with OceanBase Database V2.1.
V$OB_SQLSTAT This view is available starting with OceanBase Database V2.1.
GV$OB_SESS_TIME_MODEL This view is available starting with OceanBase Database V2.1.
V$OB_SESS_TIME_MODEL This view is available starting with OceanBase Database V2.1.
GV$OB_SYS_TIME_MODEL This view is available starting with OceanBase Database V2.1.
V$OB_SYS_TIME_MODEL This view is available starting with OceanBase Database V2.1.
V$OB_RES_MGR_SYSSTAT This view is available starting with OceanBase Database V2.1.

Statistics related to encrypted tables

View Name Description
V$OB_ENCRYPTED_TABLES This view is available starting with OceanBase Database V2.1.
V$ENCRYPTED_TABLESPACES This view is available starting with OceanBase Database V2.1.

Statistics related to transactions

View Name Description
GV$LATCH This view is available starting with OceanBase Database V2.1.
V$LATCH This view is available starting with OceanBase Database V2.1.

Views in an Oracle tenant

Dictionary views

Applicability

This topic applies only to OceanBase Database Enterprise Edition.

Views and tables

View Description
ALL_ALL_TABLES This view displays the object tables and relational tables accessible to the user.
ALL_COL_COMMENTS This view displays the column comments of the views and tables accessible to the user.
ALL_TABLES This view displays all tables accessible to the user.
ALL_TAB_COLS This view displays all columns of the tables, views, and clusters accessible to the current user.
ALL_TAB_COLUMNS This view displays all columns of the tables, views, and clusters accessible to the current user.
ALL_TAB_COMMENTS This view displays the comments of the tables and views accessible to the current user.
DBA_COL_COMMENTS This view displays the column comments of all views and tables in the database.
DBA_TAB_COMMENTS This view displays the comments of all tables and views in the database.
USER_COL_COMMENTS This view displays the column comments of all views and tables owned by the current user.
USER_TAB_COMMENTS This view displays the comments of the tables and views owned by the current user.
DBA_OB_TABLEGROUP_TABLES This view displays the association between TABLEGROUP and TABLE. It does not display tables not in a TABLEGROUP.
DBA_TABLES This view displays all tables in the database.
DBA_ALL_TABLES This view displays the object tables and relational tables in the database. Its fields are the same as those in ALL_ALL_TABLES.
DBA_TABLESPACES This view displays all tablespaces in the database.
DBA_TAB_COLS This view displays all columns of the tables, views, and clusters in the database.
DBA_TAB_COLUMNS This view displays all columns of the tables, views, and clusters in the database.
USER_ALL_TABLES This view displays the object tables and relational tables accessible to the current user. Except for the OWNER column, its fields are the same as those in ALL_ALL_TABLES.
USER_TABLES This view displays all tables owned by the current user.
USER_TABLESPACES This view displays the tablespaces accessible to the current user. Its columns are the same as those in DBA_TABLESPACES, except for the PLUGGED_IN column.
USER_TAB_COLS This view displays all columns of the tables, views, and clusters owned by the current user.
USER_TAB_COLUMNS This view displays all columns of the tables, views, and clusters owned by the current user.
ALL_VIEWS This view displays the views accessible to the current user.
DBA_VIEWS This view displays all views in the database. The columns are the same as those in ALL_VIEWS.
USER_VIEWS This view displays the views owned by the current user.
DICTIONARY This view displays the descriptions of data dictionary tables and views.
DICT This view displays the descriptions of data dictionary tables and views.
DBA_OB_TABLE_LOCATIONS This view displays the locations of tables or partitions, including system tables, user tables, and index tables.
DBA_OB_SPATIAL_COLUMNS This view displays the database name, table name, type, and SRS information corresponding to spatial index columns.

Materialized views

View name Description
DBA_MVIEW_DEPS This view displays the dependencies of materialized views in the current tenant.
DBA_MVIEW_LOGS This view displays the logs of materialized views.
DBA_MVIEW_RUNNING_JOBS This view displays the running materialized view-related tasks, including refresh tasks and MLOG cleanup tasks, in the current tenant.
USER_MVIEWS This view displays the information about materialized views.
DBA_MVIEWS This view displays the information about all materialized views.
DBA_MVREF_CHANGE_STATS This view displays the statistics related to materialized view refreshes.
DBA_MVREF_RUN_STATS This view displays the information about each materialized view refresh run, identified by a REFRESH_ID.
DBA_MVREF_STATS This view displays the basic timing statistics of materialized view refreshes.
DBA_MVREF_STATS_PARAMS This view displays the refresh statistics attributes associated with each materialized view.
DBA_MVREF_STATS_SYS_DEFAULTS This view displays the system-wide default values for materialized view refresh history statistics attributes.
DBA_MVREF_STMT_STATS This view describes the information associated with refresh statements.

Outline

View name Description
DBA_OB_OUTLINES This view displays the execution plan outline information of the current tenant.
DBA_OB_CONCURRENT_LIMIT_SQL This view displays the outline-related information of the throttling rules of the current tenant.
DBA_OB_OUTLINE_CONCURRENT_HISTORY This view displays the execution plan and throttling rule outline history information of the current tenant.
DBA_OB_FORMAT_OUTLINES This view records the detailed information about the Format Outline of the current tenant.

SPM

View name Description
DBA_SQL_PLAN_BASELINES This view displays the plan baselines of SQL statements in SPM.
DBA_SQL_MANAGEMENT_CONFIG This view displays the configuration parameters in SPM.

Basic database information

View Purpose
DBA_CONTEXT This view displays all context namespaces in the database.
DBA_OB_DATABASES This view displays the database metadata of the tenant.
DBA_OB_MAJOR_COMPACTION This view displays the global information of the major compactions in the current tenant.
DBA_OB_ZONE_MAJOR_COMPACTION This view displays the information of major compactions in each zone of the current tenant.
ALL_OBJECTS This view displays all database objects accessible to the user.
DBA_OBJECTS This view displays all database objects.
USER_OBJECTS This view displays all database objects owned by the user.
ALL_DEPENDENCIES This view displays the dependencies between all database objects.
DBA_DEPENDENCIES This view displays all dependencies between database objects.
USER_DEPENDENCIES This view displays the dependencies between objects in the current user schema.
DBA_OB_FREEZE_INFO This view displays the version information generated by major freeze.
DBA_OB_SOURCE This view displays the source code information of all storage objects in the current tenant.
USER_OB_SOURCE This view displays the source code information of storage objects owned by the current user.
ALL_OB_SOURCE This view displays the source code information of storage objects accessible to the current user.

Functions and procedures

View name Description
ALL_ARGUMENTS This view displays the parameters of functions and procedures accessible to the current user.
ALL_PROCEDURES This view displays all functions and procedures accessible to the current user, along with their related properties.
ALL_SOURCE This view displays the text source of stored objects accessible to the current user.
DBA_ARGUMENTS This view displays the parameters of functions and procedures available in the database. The columns are the same as those in ALL_ARGUMENTS.
DBA_PROCEDURES This view displays all functions and procedures available in the database, along with their related properties. The columns are the same as those in ALL_PROCEDURES.
DBA_SOURCE This view displays the text source of all stored objects in the database. The columns are the same as those in ALL_SOURCE.
USER_ARGUMENTS This view displays the parameters of functions and procedures owned by the current user. The columns are the same as those in ALL_ARGUMENTS, excluding the OWNER column.
USER_PROCEDURES This view displays all functions and procedures owned by the current user, along with their related properties. The columns are the same as those in ALL_PROCEDURES, excluding the OWNER column.
USER_SOURCE This view displays the text source of stored objects owned by the current user. The columns are the same as those in ALL_SOURCE, excluding the OWNER column.
DBA_JOBS This view displays an overview of submitted tasks.
USER_JOBS This view displays an overview of submitted tasks.
DBA_JOBS_RUNNING This view displays running tasks.

Backup and restore

View name Description
DBA_OB_BACKUP_JOBS This view displays the backup job tasks of the current tenant.
DBA_OB_BACKUP_JOB_HISTORY This view displays the history of the backup job tasks of the current tenant.
DBA_OB_BACKUP_TASKS This view displays the task-level backup tasks of the current tenant.
DBA_OB_BACKUP_TASK_HISTORY This view displays the history of the task-level backup tasks of the current tenant.
DBA_OB_BACKUP_SET_FILES This view displays the file status of the backup set.
DBA_OB_RESTORE_PROGRESS This view displays the progress of the ongoing restore task.
DBA_OB_RESTORE_HISTORY This view displays the history of the completed restore tasks.
DBA_OB_ARCHIVE_DEST This view displays the archive path configuration.
DBA_OB_BACKUP_STORAGE_INFO This view displays the backup destination information for backup and restore operations in the current tenant.
DBA_OB_BACKUP_STORAGE_INFO_HISTORY This view displays the historical backup destination information for backup and restore operations in the current tenant.
DBA_OB_BACKUP_DELETE_POLICY This view displays the deletion strategy set for expired or automatic cleanup in the current tenant.
DBA_OB_BACKUP_DELETE_JOBS This view displays the progress of the tenant-level backup cleanup job tasks.
DBA_OB_BACKUP_DELETE_JOB_HISTORY This view displays the history of the backup cleanup tasks executed in the current tenant.
DBA_OB_BACKUP_DELETE_TASKS This view displays the information about the backup_set/backup_piece cleanup tasks being executed in the current tenant.
DBA_OB_BACKUP_DELETE_TASK_HISTORY This view displays the history of the completed backup_set/backup_piece cleanup tasks in the current tenant.
DBA_OB_ARCHIVELOG This view displays the log backup status on each path.
DBA_OB_ARCHIVELOG_SUMMARY This view displays the status of all historical and current log backups.
DBA_OB_ARCHIVELOG_PIECE_FILES This view displays the status of the pieces in the backup set.
DBA_OB_BACKUP_PARAMETER This view displays the backup parameters.
DBA_OB_RECOVER_TABLE_JOBS This view displays information about table-level restore tasks.
DBA_OB_IMPORT_TABLE_JOBS This view displays information about import tasks.
DBA_OB_IMPORT_TABLE_TASKS This view displays records of table-level import tasks.
DBA_OB_RECOVER_TABLE_JOB_HISTORY This view displays results of table-level restore tasks.
DBA_OB_IMPORT_TABLE_JOB_HISTORY This view displays results of import tasks.
DBA_OB_IMPORT_TABLE_TASK_HISTORY This view displays the history records of cross-tenant table-level import tasks.

Statistics and histograms

View Description
ALL_PART_COL_STATISTICS This view displays the column statistics and histogram information of the partitions in the partitioned tables accessible to the current user.
ALL_PART_HISTOGRAMS This view displays the histogram information of the partitions.
ALL_SUBPART_COL_STATISTICS This view displays the column statistics and histogram information of the subpartitions in the partitioned tables accessible to the current user.
ALL_SUBPART_HISTOGRAMS This view displays the histogram information of the subpartitions.
ALL_TAB_COL_STATISTICS This view displays the column statistics and histogram information of the tables accessible to the current user.
ALL_TAB_HISTOGRAMS This view displays the histogram information of the tables.
ALL_TAB_STATISTICS This view displays the optimizer statistics of the tables accessible to the current user.
DBA_PART_COL_STATISTICS This view displays the column statistics and histogram information of the partitions in the partitioned tables of the database.
DBA_PART_HISTOGRAMS This view displays the histogram information of the partitions.
DBA_SUBPART_COL_STATISTICS This view displays the column statistics and histogram information of the subpartitions in the partitioned tables of the database.
DBA_SUBPART_HISTOGRAMS This view displays the histogram information of the subpartitions.
DBA_TAB_COL_STATISTICS This view displays the column statistics and histogram information of all tables in the database.
DBA_TAB_HISTOGRAMS This view displays the histogram information of the tables.
DBA_TAB_STATISTICS This view displays the optimizer statistics of all tables in the database.
USER_PART_COL_STATISTICS This view displays the column statistics and histogram information of the partitions in the partitioned tables of the current user.
USER_PART_HISTOGRAMS This view displays the histogram information of the partitions.
USER_SUBPART_COL_STATISTICS This view displays the column statistics and histogram information of the subpartitions in the partitioned tables of the current user.
USER_SUBPART_HISTOGRAMS This view displays the histogram information of the subpartitions.
USER_TAB_COL_STATISTICS This view displays the column statistics and histogram information of the tables of the current user.
USER_TAB_HISTOGRAMS This view displays the histogram information of the tables.
USER_TAB_STATISTICS This view displays the optimizer statistics for all tables of the current user.
ALL_TAB_STATS_HISTORY This view displays the table statistics modification history for all tables accessible to the current user.
DBA_TAB_STATS_HISTORY This view displays the table statistics modification history for all tables in the database.
USER_TAB_STATS_HISTORY This view displays the table statistics modification history for all tables of the current user.
ALL_IND_STATISTICS This view displays the optimizer statistics for indexes on tables accessible to the current user.
DBA_IND_STATISTICS This view displays the optimizer statistics for all indexes in the database.
USER_IND_STATISTICS This view displays the optimizer statistics for indexes on tables of the current user.
ALL_TAB_MODIFICATIONS This view displays the cumulative modification information for tables accessible to the current user.
DBA_TAB_MODIFICATIONS This view displays the cumulative modification information for tables in the database.
USER_TAB_MODIFICATIONS This view displays the cumulative modification information for tables of the current user.
DBA_OB_TABLE_OPT_STAT_GATHER_HISTORY This view queries the historical execution of table statistics collection.

Resource Manager

View name Description
DBA_OB_RSRC_DIRECTIVES This view displays the resource configuration parameters of the current tenant in Resource Manager.
DBA_OB_RSRC_IO_DIRECTIVES This view displays the I/O resource configuration of the current tenant in Resource Manager.
DBA_RSRC_GROUP_MAPPINGS This view displays the binding relationships between users and resource groups.
DBA_RSRC_CONSUMER_GROUPS This view displays the information of all resource groups in the database.
DBA_RSRC_PLANS This view displays all resource management plans defined in the system.
DBA_RSRC_PLAN_DIRECTIVES This view displays the detailed information of each resource plan directive in the database.

I/O-related statistics

View name Description
DBA_OB_STORAGE_IO_USAGE This view displays the I/O operations of the current tenant for object storage and cloud disks.

Users and privileges

View name Description
ALL_USERS This view displays all database users visible to the current user.
DBA_USERS This view displays all database users.
USER_USERS This view displays information about the current user.
ALL_COL_PRIVS This view displays column object privileges granted to the current user as the owner, grantor, or grantee. Column object privileges granted by enabled roles or PUBLIC are also displayed.
ALL_TAB_PRIVS *This view displays object privileges granted to the current user as the owner, grantor, or grantee. Object privileges granted by activated roles or the PUBLIC role are also displayed. *
DBA_COL_PRIVS This view displays all column object grants in the database.
DBA_SYS_PRIVS This view displays system privileges granted to users and roles.
DBA_TAB_PRIVS This view displays all object grants in the database.
USER_TAB_PRIVS This view displays object privileges owned by the current user.
USER_COL_PRIVS This view displays column object privileges granted to the current user as the owner, grantor, or grantee.
USER_ROLE_PRIVS This view displays roles granted to the current user.
USER_SYS_PRIVS This view displays system privileges granted to the current user.
ROLE_TAB_PRIVS This view displays table privileges granted to roles. It provides information about roles accessible to users.
ROLE_SYS_PRIVS This view displays system privileges granted to roles.
ROLE_ROLE_PRIVS This view displays roles granted to other roles. It provides information about roles accessible to users.
DBA_ROLE_PRIVS This view displays roles granted to all users and roles in the database.
DBA_ROLES This view displays all roles existing in the database.
ALL_DIRECTORIES This view displays all directories accessible to the current user.
DBA_DIRECTORIES This view displays all directories accessible to the current user.

Constraints

View Name Description
ALL_CONSTRAINTS This view displays constraint information for all tables accessible to the current user.
ALL_CONS_COLUMNS This view displays column information for all constraints of all tables accessible to the current user.
DBA_CONSTRAINTS This view displays constraint information for all tables in the database.
DBA_CONS_COLUMNS This view displays column information for all constraints of all tables in the database.
USER_CONSTRAINTS This view displays constraint information for all tables owned by the current user.
USER_CONS_COLUMNS This view displays column information for all constraints of all tables owned by the current user.

Audit

View Name Description
ALL_DEF_AUDIT_OPTS This view displays the audit conditions for which any object is audited by default.
AUDIT_ACTIONS This view displays the Action ID and corresponding name in audit records.
DBA_AUDIT_EXISTS This view displays audit trail entries generated by the AUDIT EXISTS and AUDIT NOT EXISTS statements.
DBA_AUDIT_OBJECT This view displays audit trail records for all objects in the database.
DBA_AUDIT_SESSION This view displays audit trail records for CONNECT and DISCONNECT.
DBA_AUDIT_STATEMENT This view displays audit trail records for GRANT, REVOKE, AUDIT, NOAUDIT, and ALTER SYSTEM statements in the database.
DBA_AUDIT_TRAIL This view displays all audit trail entries.
DBA_OBJ_AUDIT_OPTS This view displays detailed object-level audit configurations.
DBA_STMT_AUDIT_OPTS This view displays detailed statement-level audit configurations.
STMT_AUDIT_OPTION_MAP This view displays the type, name, and priority of statement-level audit options.
USER_AUDIT_OBJECT This view displays audit trail records for objects accessible to the current user.
USER_AUDIT_SESSION This view displays audit trail records for the connection and disconnection of the current user.
USER_AUDIT_STATEMENT This view displays audit trail entries for GRANT, REVOKE, AUDIT, NOAUDIT, and ALTER SYSTEM statements issued by the current user.
USER_AUDIT_TRAIL This view displays standard audit trail entries related to the current user.

Indexes

View Name Purpose
ALL_INDEXES This view displays the index column information of all indexes on tables accessible to the current user.
ALL_IND_COLUMNS This view displays the index column information of all indexes on tables accessible to the current user.
ALL_IND_EXPRESSIONS This view displays the information of function-based indexes accessible to the current user in the database.
ALL_IND_PARTITIONS This view displays the information of index partitions accessible to the current user in the database.
ALL_IND_SUBPARTITIONS This view displays the information of index subpartitions accessible to the current user in the database.
ALL_PART_INDEXES This view displays the partition information of partition indexes accessible to the current user.
DBA_INDEXES This view displays the index information of all tables in the database.
DBA_IND_COLUMNS This view displays the index column information of all indexes on all tables in the database.
DBA_IND_EXPRESSIONS This view displays the information of all function-based indexes in the database.
DBA_IND_PARTITIONS This view displays the information of all index partitions in the database.
DBA_IND_SUBPARTITIONS This view displays the information of all index subpartitions in the database.
USER_INDEXES This view displays the index information of all tables owned by the current user.
USER_IND_COLUMNS This view displays the index column information of all indexes on all tables owned by the current user.
USER_IND_EXPRESSIONS This view displays the information of function-based indexes owned by the current user in the database.
USER_IND_PARTITIONS This view displays the information of index partitions owned by the current user in the database. This view does not contain the INDEX_OWNER column, which is present in ALL_IND_PARTITIONS and DBA_IND_PARTITIONS.
USER_IND_SUBPARTITIONS This view displays the information of index subpartitions owned by the current user in the database. This view does not contain the INDEX_OWNER column, which is present in DBA_IND_SUBPARTITIONS and ALL_IND_SUBPARTITIONS.
USER_PART_INDEXES This view displays the partition information of partition indexes owned by the current user.

Partitions

View name Description
ALL_PART_KEY_COLUMNS This view displays the columns in the partition keys of all partitioned objects accessible to the current user.
ALL_PART_TABLES This view displays the partition information of all partitioned tables accessible to the current user.
ALL_SUBPARTITION_TEMPLATES This view displays the descriptions of all subpartition templates.
ALL_SUBPART_KEY_COLUMNS This view displays the columns in the subpartition keys of all partitioned objects accessible to the current user.
ALL_TAB_PARTITIONS This view displays the multi-level partition information, partition storage parameters, and partition statistics of all partitioned tables.
ALL_TAB_SUBPARTITIONS This view displays the partition-level information, partition storage parameters, and partition statistics generated by the DBMS_STATS package for all partitions accessible to the current user.
DBA_OB_DYNAMIC_PARTITION_TABLES This view displays the information of dynamic partition tables in the current tenant.
DBA_PART_INDEXES This view displays the partition information of all partitioned indexes.
DBA_PART_KEY_COLUMNS This view displays the columns in the partition keys of all partitioned objects in the database.
DBA_PART_TABLES This view displays the partition information of all partitioned tables accessible to the current user.
DBA_SUBPARTITION_TEMPLATES This view displays the descriptions of all subpartition templates.
DBA_SUBPART_KEY_COLUMNS This view displays the columns in the subpartition keys of all partitioned objects in the database.
DBA_TAB_PARTITIONS This view displays the multi-level partition information, partition storage parameters, and partition statistics of all partitions accessible to the current user.
DBA_TAB_SUBPARTITIONS This view displays the subpartition name, table name, name of the partition to which it belongs, its storage attributes, and the statistics generated by the DBMS_STATS package.
USER_PART_KEY_COLUMNS This view displays the columns in the partition keys of all partitioned objects owned by the current user.
USER_PART_TABLES This view displays the partition information of all partitioned tables owned by the current user.
USER_SUBPARTITION_TEMPLATES This view displays the descriptions of all subpartition templates.
USER_SUBPART_KEY_COLUMNS This view displays the columns in the subpartition keys of all partitioned objects owned by the current user.
USER_TAB_SUBPARTITIONS This view displays the subpartition name, table name, name of the partition to which it belongs, and its storage attributes for each subpartition of each table owned by the current user.
USER_TAB_PARTITIONS This view displays the multi-level partition information, partition storage parameters, and partition statistics of all partitions owned by the current user.

Session related

View name Description
DBA_OB_DEADLOCK_EVENT_HISTORY This view displays the history of deadlock events. In a non-root tenant, it shows the history of the current tenant.

Sequences

View name Description
ALL_SEQUENCES This view displays all SEQUENCEs accessible to the user.
DBA_SEQUENCES This view displays all SEQUENCEs in the database.
USER_SEQUENCES This view displays all SEQUENCEs owned by the current user.
TENANT_VIRTUAL_GLOBAL_VARIABLE This view displays global variable information.
TENANT_VIRTUAL_SESSION_VARIABLE This view displays session variable information.

Synonyms

View name Description
ALL_SYNONYMS This view displays all synonyms accessible to the user.
DBA_SYNONYMS This view displays all synonyms in the database.
USER_SYNONYMS This view displays all synonyms owned by the current user.

Triggers

View name Description
ALL_TRIGGERS This view displays triggers and their descriptions on tables owned by the current user. If the user has the CREATE ANY TRIGGER privilege, this view displays all triggers in the database.
DBA_TRIGGERS This view displays all triggers in the database.
USER_TRIGGERS This view displays all triggers owned by the current user.

Recyclebin

View name Description
DBA_RECYCLEBIN This view displays information about all recyclebins in the database.
USER_RECYCLEBIN This view displays information about the recyclebin owned by the current user. The columns are the same as those in DBA_RECYCLEBIN, except that the OWNER column is removed.

NLS

View name Description
NLS_DATABASE_PARAMETERS This view displays the NLS parameters at the database level (OceanBase Database tenant level).
NLS_INSTANCE_PARAMETERS This view displays the NLS parameters at the instance level (tenant level).
NLS_SESSION_PARAMETERS This view displays the NLS parameters at the session level.

User-defined types

View name Description
ALL_COLL_TYPES This view displays the user-defined collection types available in the database. Its columns are the same as those in DBA_COLL_TYPES.
ALL_TYPES This view displays the user-defined types available in the database.
ALL_TYPE_ATTRS This view displays the attribute information of the user-defined types available in the database.
DBA_COLL_TYPES This view displays the user-defined collection types available in the database. Its columns are the same as those in ALL_COLL_TYPES.
DBA_TYPES This view displays the user-defined types available in the database.
DBA_TYPE_ATTRS This view displays the attribute information of the user-defined types available in the database.
USER_COLL_TYPES This view displays the user-defined collection types available to the current user.
USER_TYPES This view displays the user-defined types available to the current user.
USER_TYPE_ATTRS This view displays the attribute information of the user-defined types available to the current user.

Storage objects

View name Description
ALL_ERRORS This view displays the errors of the storage objects accessible to the current user.
DBA_ERRORS This view displays the errors of the storage objects in the database.
USER_ERRORS This view displays the errors of the storage objects accessible to the current user.
DBA_SEGMENTS This view displays the storage information of all segments in the database.
USER_SEGMENTS This view displays the storage information of the segments owned by the objects under the current user.

PROFILE

View Name Description
ALL_PROFILES This view displays all profiles and their limits.
DBA_PROFILES This view displays all profiles and their limits.
USER_PROFILES This view displays all profiles and their limits.

Replica and log-related views

View Name Description
DBA_OB_CS_REPLICA_STATS This view displays the progress of converting tablets to columnar storage in the log streams of C replicas on all OBServer nodes in the current tenant.
DBA_OB_LS_LOCATIONS This view displays the distribution information of log streams (LS) replicas in the current tenant.
DBA_OB_TABLEGROUPS This view displays the metadata of table groups, mainly focusing on the partition information of table groups.
DBA_OB_TABLEGROUP_PARTITIONS This view displays the primary partition information of partitioned table groups.
DBA_OB_TABLEGROUP_SUBPARTITIONS This view displays the secondary partition information of partitioned table groups.
DBA_OB_TABLET_REPLICAS This view displays all tablet replicas in the current tenant. Each tablet replica is uniquely identified by the joint key: <TABLET_ID, SVR_IP, SVR_PORT, LS_ID>.
DBA_OB_TABLET_TO_LS This view displays the list of all tablets in the current tenant and the log stream information to which each tablet belongs.
DBA_OB_LS This view displays the status and recovery progress of log streams.

WR-related

View name Description
DBA_WR_SNAPSHOT This view displays the SNAPSHOT information of the current tenant.
DBA_WR_ACTIVE_SESSION_HISTORY This view displays the ASH data of the current tenant.
DBA_WR_STATNAME This view displays the names of the system statistics of the current tenant.
DBA_WR_SYSSTAT This view displays the details of the system statistics of the current tenant.
DBA_WR_CONTROL This view displays the WR-related configuration information.
DBA_WR_SYSTEM_EVENT This view displays the tenant-level wait event information of the current tenant.
DBA_WR_EVENT_NAME This view displays the tenant-level wait event names of the current tenant.
DBA_WR_SQLTEXT This view displays the SQL texts collected by WR of the current tenant.
DBA_WR_SQLSTAT This view displays the basic performance statistics of the SQL statements executed by the current tenant.
DBA_WR_SYS_TIME_MODEL This view displays the WR data of the Time Model statistics of the current tenant.

Load balancing-related

View name Description
DBA_OB_TRANSFER_PARTITION_TASKS This view displays the Transfer Partition tasks being processed in the current tenant.
DBA_OB_TRANSFER_PARTITION_TASK_HISTORY This view displays the history of the Transfer Partition tasks executed in the current tenant.

Scheduler

View name Description
DBA_SCHEDULER_JOBS This view displays the information of the scheduler jobs accessible to the current user.
DBA_SCHEDULER_PROGRAM This view displays all the scheduler information in the database.
DBA_SCHEDULER_JOB_RUN_DETAILS This view displays the information of all the scheduler jobs in the tenant.

DBLINK-related

View name Description
ALL_DB_LINKS This view displays all the DBLINKs accessible to the current user.
DBA_DB_LINKS This view displays all the DBLINKs created in the current tenant.
USER_DB_LINKS This view displays the DBLINKs created by the current user.

Unsupported views

View name Purpose
ALL_METHOD_PARAMS This view displays method parameters of object types that the current user can access.
ALL_SCHEDULER_JOB_ARGS This view displays scheduler job arguments that the current user can query.
ALL_SCHEDULER_PROGRAM_ARGS This view displays scheduler program arguments that the current user can query.
ALL_TYPE_METHODS This view displays methods of object types that the current user can access.
DBA_METHOD_PARAMS This view displays method parameters of object types in the database.
DBA_SCHEDULER_JOB_ARGS This view displays scheduler job arguments in the database.
USER_SCHEDULER_JOB_ARGS This view displays scheduler job arguments of jobs owned by the current user.
DBA_SCHEDULER_PROGRAM_ARGS This view displays scheduler program arguments in the database.
USER_SCHEDULER_PROGRAM_ARGS This view displays scheduler program arguments of programs owned by the current user.
DBA_TYPE_METHODS This view displays methods of object types in the database.
USER_TYPE_METHODS This view displays methods of object types that the current user can access. The fields of this view are the same as those of the ALL_TYPE_METHODS view, except that the OWNER field is not included.

Overview of performance views

ASH-related

View Description
GV$ACTIVE_SESSION_HISTORY Displays the active session history.
V$ACTIVE_SESSION_HISTORY Displays the active session history.
GV$OB_ACTIVE_SESSION_HISTORY Displays the active session history of all OBServer nodes in the current tenant.
V$OB_ACTIVE_SESSION_HISTORY Displays the active session history of the current OBServer node in the current tenant.

Partition-related

View Description
V$OB_DYNAMIC_PARTITION_TABLES Displays the dynamic partition table information of the current tenant.

Statistics

View Description
GV$OB_KVCACHE Displays the KVCACHE information on each OBServer node.
GV$OB_PARAMETERS Displays the configuration information on all OBServer nodes in the tenant.
GV$OB_SERVER_SCHEMA_INFO Displays the schema information on all servers.
V$OB_SERVER_SCHEMA_INFO Displays the schema information on all servers.
GV$OB_UNITS Displays the unit information of the OBServer node in the tenant. The system tenant can view the unit information of all OBServer nodes in the cluster.
GV$SYSSTAT Displays the system-level statistical events on all servers.
GV$DML_STATS Displays the DML information in the current user table.
V$DML_STATS Displays the DML information in the current user table.
V$GLOBALCONTEXT Displays the CLIENT_IDENTIFIER value of the global context attributes accessible to the current session.
V$OB_KVCACHE Displays the KVCACHE information on each OBServer node.
V$OB_PARAMETERS Displays the configuration information on the current OBServer node.
V$SYSSTAT Displays the system-level statistical events on the current server.
V$OB_UNITS Displays the unit information of the current OBServer node.
V$VERSION Displays the name and version information of all components of the database product.
V$STATNAME Displays the name of the statistical item.

Instance-related

View name Purpose
GV$INSTANCE This view displays the status of the current database instance.
V$INSTANCE This view displays the status of the current database instance.

Memory-related

View name Purpose
GV$OB_MEMORY This view displays the memory usage of each tenant on all servers.
GV$OB_MEMSTORE This view displays the memory usage of MemTables of all tenants on all servers.
GV$OB_SQL_WORKAREA_MEMORY_INFO This view displays some overall information about the SQL Workarea, including the maximum available memory, current used memory, and current hold memory.
GV$OB_SSTABLES This view displays the SSTable information of a tenant.
GV$OB_MEMSTORE_INFO This view displays the detailed information about MemTables of all partitions of all tenants on all servers.
V$OB_MEMSTORE_INFO This view displays the detailed information about MemTables of all partitions of all tenants on all servers.
V$OB_MEMORY This view displays the memory statistics at the tenant level.
V$OB_MEMSTORE This view displays the memory usage of MemTables of all tenants on the current server.
V$OB_SSTABLES This view displays the SSTable information of a tenant.
GV$OB_TENANT_MEMORY This view displays the memory usage of each tenant on the cluster.
V$OB_TENANT_MEMORY This view displays the memory usage of each tenant in the current observer process.

Cache-related

View name Description
GV$OB_SS_LOCAL_CACHE This view displays the metrics of various cache data in the local cache of each OBServer node for all tenants in shared storage mode.
V$OB_SS_LOCAL_CACHE This view displays the metrics of various cache data in the local cache of the current OBServer node for all tenants in shared storage mode.
GV$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache of all servers.
GV$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache of all servers for the current tenant.
GV$OB_PLAN_CACHE_STAT This view records the overall status of each plan cache for the current tenant on all servers.
V$OB_PLAN_CACHE_PLAN_EXPLAIN This view displays the physical execution plans cached in the plan cache of the current server.
V$OB_PLAN_CACHE_PLAN_STAT This view records the status of each cached object in the plan cache of the current server for the current tenant.
V$OB_PLAN_CACHE_STAT This view records the overall status of each plan cache for the current tenant on all servers.
V$RSRC_PLAN This view displays the resource management plan of the current active tenant.

Resource Manager-related

View name Description
GV$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on all OBServer nodes for the current tenant.
GV$OB_FUNCTION_IO_STAT This view displays the I/O statistics at the Function level on all OBServer nodes for the current tenant.
V$OB_GROUP_IO_STAT This view displays the real-time status of each resource group on the current OBServer node for the current tenant.
V$OB_FUNCTION_IO_STAT This view displays the I/O statistics at the Function level on the current OBServer node for the current tenant.

I/O-related statistics

View name Description
GV$OB_SHARED_STORAGE_QUOTA This view displays the I/O access resource information on all OBServer nodes.
V$OB_SHARED_STORAGE_QUOTA This view displays the I/O access resource information on the current OBServer node.

Log-related views

View name Description
GV$OB_LOG_STAT This view displays the status of Palf.
V$OB_LOG_STAT This view displays the status of Palf.

Monitoring information

View name Description
GV$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on all OBServer nodes.
GV$OB_PS_ITEM_INFO This view provides monitoring capabilities for Prepared Statements, including basic information about all prepared statements in the PS cache.
GV$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
GV$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information of the DTL intermediate result manager.
V$OB_DTL_INTERM_RESULT_MONITOR This view displays the monitoring information of the DTL intermediate result manager.
V$OB_PX_TARGET_MONITOR This view displays the usage of PX threads on OBServer nodes.
V$OB_PS_ITEM_INFO This view provides monitoring capabilities for Prepared Statements, including basic information about all prepared statements in the PS cache.
V$OB_PS_STAT This view monitors the overall status of the PS cache, including hit rate, memory usage, and the number of cached items.
V$SQL_MONITOR_STATNAME This view displays the meaning of the numbers in the OTHERSTAT_X_ID field of GV$SQL_PLAN_MONITOR.

Session-related

View Name Description
GV$OB_PROCESSLIST This view displays session information on all OBServer nodes of the tenant.
GV$SESSION_WAIT This view displays information about the current or last wait event for all sessions on all servers, including the wait event name and wait time.
GV$SESSION_WAIT_HISTORY This view displays information about the last 10 wait events for all sessions on all servers.
GV$SESSTAT This view displays session-level statistics on all servers.
V$NLS_PARAMETERS This view displays NLS parameters at the session level.
V$OB_PROCESSLIST This view displays session information on the current OBServer node.
V$SESSION_WAIT This view displays information about the current or last wait event for all sessions on the current server, including the wait event name and wait time.
V$SESSION_WAIT_HISTORY This view displays information about the last 10 wait events for all sessions on the current server.
V$SESSTAT This view displays session-level statistics.
V$EVENT_NAME This view displays event definitions in the tenant.

SQL-related statistics

View Name Description
GV$OB_SQL_AUDIT This view displays statistics such as the source and execution status of each SQL request on all servers.
V$OB_SQL_AUDIT This view displays statistics such as the source and execution status of each SQL request on the current server.
GV$SQL_PLAN_MONITOR This view displays plan-level statistics for slow queries on all OBServer nodes. Each slow query has a corresponding statistic, and the trace information of the plan is recorded.
V$SQL_PLAN_MONITOR This view displays plan-level statistics for slow queries on all OBServer nodes. Each slow query has a corresponding statistic, and the trace information of the plan is recorded.
GV$OB_FLT_TRACE_CONFIG This view displays diagnostic information for full-link tracing.

Threads

View Name Description
GV$OB_PX_WORKER_STAT This view displays the execution information of each thread in parallel execution scenarios.
V$OB_PX_WORKER_STAT This view displays the execution information of each thread in parallel execution scenarios.

Workarea

View Name Description
GV$SQL_WORKAREA This view displays the workarea statistics of all operators executed by SQL automatic memory management.
GV$SQL_WORKAREA_ACTIVE This view displays the workarea information of active operators.
GV$SQL_WORKAREA_HISTOGRAM This view displays the workarea statistics of all operators executed by SQL automatic memory management.
V$OB_SQL_WORKAREA_MEMORY_INFO This view queries some information about the SQL workarea, including the maximum available memory, current used memory, and current hold memory.
V$SQL_WORKAREA This view displays the workarea statistics of all operators executed by SQL automatic memory management.
V$SQL_WORKAREA_ACTIVE This view displays the workarea information of active operators.
V$SQL_WORKAREA_HISTOGRAM This view displays the workarea statistics of all operators executed by SQL automatic memory management.

WR related

View Name Description
GV$OB_QUERY_RESPONSE_TIME_HISTOGRAM This view displays the histogram information of the query execution time of all nodes in the current tenant.
GV$OB_RES_MGR_SYSSTAT This view displays the statistics of resource groups in all OBServer nodes of the current tenant.
V$OB_RES_MGR_SYSSTAT This view displays the statistics of resource groups in the current OBServer node of the current tenant.
GV$OB_SQLSTAT This view displays the basic performance statistics of SQL statements in the cluster. Each SQL statement is represented as a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
V$OB_SQLSTAT This view displays the basic performance statistics of SQL statements on the current node. Each SQL statement is represented as a row (i.e., each unique combination of SQL_ID and Plan_Hash is a row).
GV$OB_SESS_TIME_MODEL This view displays the session-level Time Model statistics in the cluster.
V$OB_SESS_TIME_MODEL This view displays the session-level Time Model statistics on the current node.
GV$OB_SYS_TIME_MODEL This view displays the tenant-level Time Model statistics in the cluster.
V$OB_SYS_TIME_MODEL This view displays the tenant-level Time Model statistics on the current node.
V$OB_QUERY_RESPONSE_TIME_HISTOGRAM This view displays the histogram information of the query execution time of the current node in the current tenant.

Transaction-related views

View name Description
GV$OB_COMPACTION_PROGRESS This view displays the OBServer-level major compaction progress of the tenant.
GV$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
GV$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
GV$OB_TABLET_COMPACTION_HISTORY This view displays the major compaction history at the tablet level.
GV$OB_TABLET_COMPACTION_PROGRESS This view displays the major compaction progress at the tablet level.
GV$OB_TRANSACTION_PARTICIPANTS This view displays the transaction participants on all OBServer nodes.
GV$SYSTEM_EVENT This view displays some wait events at the tenant system level on all servers, and counts the number of occurrences, wait time, and timeout count for each type of wait event.
GV$GLOBAL_TRANSACTION This view displays the information about active global transactions.
V$OB_COMPACTION_PROGRESS This view displays the major compaction progress at the server level for the tenant.
V$OB_COMPACTION_SUGGESTIONS This view displays the major compaction suggestions.
V$OB_COMPACTION_DIAGNOSE_INFO This view displays the major compaction diagnostic information.
V$OB_TABLET_COMPACTION_HISTORY This view displays the major compaction history at the tablet level.
V$OB_TABLET_COMPACTION_PROGRESS This view displays the major compaction progress at the tablet level.
V$OB_TRANSACTION_PARTICIPANTS This view displays the transaction participants on all OBServer nodes.
V$SYSTEM_EVENT This view displays some wait events at the tenant system level on the current server, and counts the number of occurrences, wait time, and timeout count for each type of wait event.
V$GLOBAL_TRANSACTION This view displays the information about active global transactions.
GV$OB_GLOBAL_TRANSACTION This view displays the information about all XA transactions in the cluster.
V$OB_GLOBAL_TRANSACTION This view displays the information about all XA transactions with the current node as the original scheduler.

Time zones

View name Description
V$TIMEZONE_NAMES Displays the valid time zone names.

Encrypted tables

View name Description
V$OB_ENCRYPTED_TABLES Displays the encryption status of tables that have encryption enabled.
V$ENCRYPTED_TABLESPACES Displays the encryption status of tablespaces that have encryption enabled.

DBLINK

View name Description
GV$DBLINK Displays all database links (IN_TRANSACTION=YES) opened after the query sessions initiated from this view. These database links must be committed or rolled back before they are closed.
V$DBLINK Displays all database links (IN_TRANSACTION=YES) opened after the query sessions initiated from this view. These database links must be committed or rolled back before they are closed.

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Overview of views in the sys tenant
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Views in a MySQL tenant
Dictionary views overview
Overview of performance views
Views in an Oracle tenant
Dictionary views
Overview of performance views