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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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QUICK START
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OceanBase Database

SQL - V4.1.0Enterprise Edition

  • What is OceanBase Database
    • Overview
    • Differences between the features of the Enterprise Edition and the Community Edition
    • System architecture
    • Compatibility with Oracle
      • Overview
      • SQL data types
      • Built-in functions
      • System views
    • Compatibility with MySQL
    • Limitations
  • Get Started
    • Get started with OceanBase Database
    • 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 Python application
      • 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
      • DDL
        • Try out new DDL features in MySQL mode
        • Try out new DDL features in Oracle mode
    • Video tutorials
  • Develop
    • Develop applications in MySQL mode
      • Connect to OceanBase Database
        • Overview
        • Connect to an OceanBase Database tenant by using the mysql client
        • Connect to an OceanBase Database tenant by using OBClient
        • Connect to OceanBase Database by using ODC
        • Connect to OceanBase Database by using Spring Boot
        • Connect to OceanBase Database by using Spring Batch
        • Connect to OceanBase Database by using Spring JDBC
        • Connect to OceanBase Database by using Spring JPA
        • Connect to OceanBase Database by using Hibernate
        • Use database connection pool
          • Database connection pool configuration
          • Configure a Tomcat connection pool
          • Configure a C3P0 connection pool
          • Configure a Proxool connection pool
          • Configure a HiKariCP connection pool
          • Configure a DBCP connection pool
          • Configure a CommonPool connection pool
          • Configure a JDBC connection pool
      • Create database objects
        • Create a database
        • Create a table
        • Create indexes
      • Write data
        • Insert data
        • Update data
        • Delete data
        • Replace data
      • Read data
        • About queries
        • Single-table queries
        • Conditional queries
        • ORDER BY queries
        • GROUP BY queries
        • Use the LIMIT clause in queries
        • Join tables
          • INNER JOIN queries
          • FULL JOIN queries
          • LEFT JOIN queries
          • RIGHT JOIN queries
          • Subqueries
        • 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
          • Use the SELECT FOR UPDATE statement to lock query results
        • Execution plans
          • View an execution plan
          • Understand an execution plan
        • Use SQL hints in queries
        • Variables of query timeout
      • 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
      • Troubleshoot common errors
        • 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 in Oracle mode
      • Connect to OceanBase Database
        • Overview
        • Connect to an OceanBase Database tenant by using OBClient
        • Connect to OceanBase Database by using ODC
        • Connect to OceanBase Database by using Spring Boot
        • Connect to OceanBase Database by using Spring Batch
        • Connect to OceanBase Database by using Spring JDBC
        • Connect to OceanBase Database by using MyBatis
        • Use database connection pool
          • Database connection pool configuration
          • Configure a Tomcat connection pool
          • Configure a C3P0 connection pool
          • Configure a Proxool connection pool
          • Configure a HiKariCP connection pool
          • Example of configuring a DBCP connection pool
          • Configure a CommonPool connection pool
          • Configure a JDBC connection pool
      • Create database objects
        • Create a table
        • Create an index
      • Write data
        • Insert data
        • Update data
        • Delete data
        • Replace data
      • Read data
        • About queries
        • Single-table queries
        • Conditional queries
        • ORDER BY queries
        • GROUP BY queries
        • Use Row_Limiting_Clause in queries
        • Join tables
          • INNER JOIN queries
          • FULL JOIN queries
          • LEFT JOIN queries
          • RIGHT JOIN queries
          • Subqueries
        • 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
        • Execution plans
          • View execution plans of queries
          • Understand an execution plan
        • Use SQL hints in queries
        • About query timeout variables
      • Transactions
        • Overview
        • Start a transaction
        • Savepoints
          • Mark a savepoint
          • Roll back a transaction to a savepoint
        • Commit a transaction
        • Roll back a transaction
      • Troubleshoot common errors
        • Idle transaction timed out, with ORA-24761 error reported
        • Transaction timeout, with ORA-00600 error reported
        • User locked, with ERROR 3118 reported
        • Incorrect user password, with ERROR 1045 reported
        • Table already exists, with ORA-00955 error reported
        • Table does not exist, with ORA-04043 error reported
        • Duplicate data inserted, with ORA-00001 error reported
        • ORA-00600 error reported in foreign key addition
        • Inconsistent data types, with ORA-00932 error reported
  • Deploy
    • Overview
    • OceanBase cluster deployment solutions
    • Deploy OceanBase Database Enterprise Edition
      • Deployment process
      • Before deployment
        • Prepare servers
        • Configure servers
        • Prepare installation packages
      • Deploy through GUI
        • Configure deployment environment
          • Deploy OAT
          • Verify OAT deployment
          • Configure the clock source
          • Upload installation packages
          • Add a server
          • Edit a server
          • Create MetaDB
        • Deploy OCP
          • Overview
          • Deploy OCP
          • Verify OCP deployment
        • Deploy OceanBase clusters
          • Add an OBServer node to the resource pool
          • Create an OceanBase cluster
        • Deploy ODP
          • Overview
          • Deploy ODP
        • Create OceanBase tenant
          • View resources available for a business tenant
          • Create a tenant
          • Verify connectivity after tenant creation
        • Deploy ODC
          • Overview
          • Deploy ODC
          • Verify ODC deployment
      • Deploy through CLI
        • Configure deployment environment
          • Install oat-cli
          • Use oat-cli to configure the deployment environment
          • Configure the clock source
          • Upload installation packages
          • Configure host information
          • Check the environment before deployment
        • Deploy OCP
          • Overview
          • Generate a configuration file
          • Deploy OCP
          • Verify OCP deployment
        • Deploy OceanBase clusters
          • Deploy a single-replica OceanBase cluster
          • Deploy a three-replica OceanBase cluster
        • Deploy ODP
          • Deploy ODP
        • Create OceanBase tenants
          • View resources available for a business tenant
          • Create a tenant
          • Verify connectivity after tenant creation
        • Deploy ODC
          • Overview
          • Modify the configuration file
          • Start deployment
          • Verify deployment
    • Deploy OceanBase Database Community Edition
      • Overview
      • Deploy locally
        • Software and hardware requirements
        • Before deployment
          • Check resources
          • Set password-free SSH logon
          • Configure the clock source
          • Perform disk planning
          • Configure the limits.conf file
          • Configure the sysctl.conf file
          • Disable the firewall and SELinux
          • Create a user
        • Deploy through GUI
          • Deploy an OceanBase cluster by using OCP
        • Deploy OceanBase Database in a production environment by using a CLI
      • Deploy OceanBase Database in a Kubernetes cluster
    • Clean up an old cluster
  • Migrate
    • About data migration
    • Migrate from MySQL databases to OceanBase Database
      • Migrate data from a MySQL database to OceanBase Database by using mydumper and myloader
      • 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 DBCAT to migrate schemas from OceanBase Database to a MySQL database
      • Use DataX to migrate table data from OceanBase Database to a MySQL database
      • Synchronize data from OceanBase Database to a MySQL database using Canal
      • Migrate data from a MySQL OceanBase database to a MySQL database using CloudCanal
      • Migrate data from OceanBase Database to a MySQL database using Flink CDC
      • Migrate data from a MySQL database in OceanBase Database to a MySQL database using ChunJun
    • Migrate from Oracle databases to 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 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 DBCAT to migrate DB2 LUW table schemas to 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 OBLOADER & OBDUMPER to migrate data between MySQL tenants in OceanBase Database clusters
      • Use OBLOADER & OBDUMPER to migrate data from a MySQL tenant to an Oracle tenant in an OceanBase cluster
      • Use OBLOADER & OBDUMPER to migrate data between Oracle tenants in OceanBase Database clusters
      • 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 by using OUTFILE statements
    • Bypass import
      • Overview
      • Import data in bypass mode by using the LOAD DATA statement
      • Import data in bypass mode by using the INSERT INTO SELECT statement
  • Manage
    • Log on to an OceanBase Database 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
        • Online scale-out from standalone deployment to distributed deployment
        • Upgrade clusters
          • Upgrade using CLI
            • Overview
            • Perform an upgrade
            • Check upgrade results
      • Troubleshoot common problems
        • Failures of a minority of nodes
        • Failures of the majority of nodes
    • Manage tenants
      • Tenant introduction
      • Tenant capacity
      • Tenant types
      • User tenants
      • System variables of a tenant
      • Common tenant operations
        • Create a tenant
        • Resource isolation
          • Overview
          • Manage resource isolation (Oracle mode)
            • Configure cgroups
            • Configure user-level resource isolation
            • Configure SQL statement-level resource isolation
            • 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 user-level resource isolation
            • Configure SQL statement-level resource isolation
            • Update a plan directive
            • Delete a plan directive
            • Delete a resource management plan
            • Delete a resource group
            • Clear cgroup configurations
        • View tenant and resource information
        • Set and modify the tenant allowlist
        • View system variables of a tenant
        • Modify system variables of a tenant
        • Scale in/out
          • Tenant scaling
          • Modify the unit configs for a tenant
          • Modify the number of resource units for a tenant
          • Modify the number of primary zones for a tenant
        • Modify the attributes of a resource pool
        • Modify attributes of a tenant
        • Lock and unlock a tenant
        • Drop a tenant
        • Restore a tenant
        • Drop a resource pool
        • Drop a unit config
    • Manage replicas
      • What is replica
      • Replica distribution
        • Locality
        • Locality common operations
          • View locality
          • Modify locality
          • Add replicas
          • Remove replicas
          • Adjust the distribution of replicas
          • View the locality change history
          • Migrate units
      • Traffic distribution
      • Data distribution
    • High availability
      • What is high availability
      • Multi-replica disaster recovery
        • Data links
        • High availability of ODP
        • Database-level high availability
        • Disaster recovery architecture and levels
      • Physical standby database disaster recovery
        • Overview
        • Limitations
        • Create a standby tenant
        • Change the restore source of a standby tenant
        • Monitor the log synchronization status of a standby tenant
        • Adjust the log synchronization performance of a standby tenant
        • Adjust the log archiving speed of the primary tenant
        • Switch roles
          • Overview
          • Switchover
          • Failover
        • Drop a primary or standby tenant
      • Arbitration high availability
        • Overview
        • Enable the arbitration service
        • Disable the arbitration service
        • Modify the downgrade timeout period
        • Replace the arbitration service
        • Remove the arbitration service
      • Manage recycle bin
        • Recycle bin
        • 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
          • Authentication
          • Password complexity
          • Login failure processing
        • Oracle mode
          • Authentication
          • Password complexity
          • Login failure processing
      • Access control
        • Overview
        • Users and permissions
          • Overview
          • MySQL mode
            • Privilege types in MySQL mode
            • Grant privileges
            • Privilege delegation
            • View user privileges
            • Modify user privileges
          • Oracle mode
            • Privilege types in Oracle mode
            • Direct privileges
            • Privilege delegation
            • Manage roles
            • Indirect privileges
            • View user privileges
            • Modify user privileges
        • Network security access control
        • Row-level access control
      • Data transmission encryption
        • Overview
        • OBServer transmission encryption
        • ODP transmission encryption
      • Transparent data encryption
        • Overview
        • MySQL mode
          • Enable transparent data encryption for new tables
          • Enable transparent data encryption for existing tables
          • Decrypt a table
        • Oracle mode
          • Enable transparent data encryption for a new table
          • Enable transparent data encryption for an existing table
          • Decrypt a table
      • Security audit
        • Overview
        • Enable security audit
        • Set and view audit rules
        • View audit records
        • Audit user logon operations
        • Audit user operations
        • Audit specified database objects
    • Backup and restore
      • Introduction to physical backup and restore
      • Deploy NFS
      • Log archive
        • Overview
        • Prepare for log archiving
        • Enable log archiving
        • Disable log archiving
        • View information about pieces
        • View the archiving progress
        • View the archiving history
        • View the archiving parameter settings
        • Change the destination of log archiving
        • Views related to log archiving
      • Data backup
        • Preparations
        • Initiate a full data backup job
        • Initiate an incremental data backup job
        • Stop a backup job
        • View the data backup progress
        • View the data backup history
        • View data backup parameter settings
        • Change the backup destination
        • Views related to data backup
      • 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 before the restore
        • Perform physical restore
        • Cancel the restore
        • Query the restore progress
        • Query the restore result
        • Change the role of a standby tenant to PRIMARY
        • Replay logs to a standby tenant
        • Parameters related to physical restore
        • Views related to physical restore
    • Monitoring
      • 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 metrics
      • View logs
        • Search for the logs of a specific SQL request
    • Performance tuning
      • SQL tuning
        • Execution plan optimization
          • Statistical information and row estimation
            • Statistical information
              • Collect statistical information
                • Automatic statistics collection
        • Business logic optimization
          • Schema specifications
    • Troubleshooting
      • Troubleshoot SQL execution errors
  • Reference
    • Concepts
      • Overall architecture of OceanBase Database
      • Database objects
        • Oracle mode
          • Tables
            • Overview
        • MySQL mode
          • Tables
            • Data type
              • Date and time data types
      • Data reliability and high availability
        • High availability architecture
          • Automatic handling of node failures
    • Administrator guide
      • Database connection and routing
        • Overview
        • Manage 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
            • 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
        • Manage routing
          • Table-based routing of ODP
          • LDC-based routing
          • ODP routing policy
            • Read/Write splitting
            • Follower-first read
            • Blocklist mechanism
            • Transaction routing
      • Cluster and multi-tenant management
        • Manage clusters
          • Create a cluster
          • Manage clusters
          • Manage cluster parameters
            • Overview
            • Query cluster parameters
            • Modify cluster-level parameters
          • Manage zones in clusters
            • Overview of zone management
            • Add or delete a zone
            • Start or stop a zone
            • Modify the configurations of a zone
            • Restart a zone
            • Isolate a failed zone
          • Manage nodes
            • Add nodes
            • View the status of a node
            • Stop or start a node
            • Restart a node
            • Isolate a failed node
            • Delete a node
            • Replace a node
          • View the topology of a cluster
          • Overview of cluster tenant management
          • Monitor cluster performance
          • Cluster performance report
          • View resource information of a cluster
        • Manage configurations
          • Overview of configuration management
          • Set parameters
          • Set variables
          • General system parameters
          • Default production parameters
          • Minimum resource configurations
        • Manage resources
          • Overview
          • Create a resource unit configuration
          • Manage resource units
            • View resource unit configurations
            • Modify configurations of a resource unit
            • Drop a resource unit
          • Create a resource pool
          • Manage resource pools
            • View resource pools
            • Allocate a resource pool to a tenant
            • Modify a resource pool
            • Merge resource pools
            • Split a resource pool
            • Remove a resource pool from a tenant
            • Delete a resource pool
          • View resource allocation
        • Manage tenants
          • Overview of tenant management
          • Create a tenant
          • Create a user tenant
          • View tenant information
          • Copy a tenant
          • Modify a tenant
          • Rename a tenant
          • Drop a tenant
          • Manage users and permissions
            • Introduction
              • Overview
              • sys tenant
              • Oracle tenants
              • MySQL tenants
            • Oracle mode
              • Create a user
              • Set password complexity rules
              • Handle logon failures
              • View user privileges
              • Modify user privileges
              • Change the password of a user
              • Lock and unlock a user
              • Drop a user
              • Manage roles
                • Overview
                • Create a role
                • Assign a role to another role
                • Assign a role to a user
                • Specify valid or invalid roles for a user
                • View roles
                • Modify a role
                • Revoke a role
                • Drop a role
            • MySQL mode
              • Create a user
              • Set password complexity rules
              • Handle logon failures
              • View user privileges
              • Modify user privileges
              • Change the password of a user
              • Lock and unlock a user
              • Drop a user
          • Set and view the tenant allowlist
          • View the topology of a tenant
          • View the resource configurations of a tenant
          • Modify the resource configurations of a tenant
          • View the performance metrics of a tenant
          • View tenant sessions
          • Terminate a tenant session
          • Set the maximum number of connections for a tenant
          • Manage tenant parameters
            • Overview
            • Query tenant-level parameters
            • Modify tenant-level parameters
          • Manage tenant variables
        • Manage data storage
          • Dump management
            • Overview
            • Automatically trigger a minor compaction
            • Manually initiate a minor compaction
            • View minor compaction information
            • Modify minor compaction settings
          • Merge management
            • Overview
            • Automatically trigger a major compaction
            • Configure scheduled major compactions
            • Adaptive major compaction
            • Manually initiate a major compaction
            • Manually control a major compaction
            • View the major compaction process
            • Modify major compaction settings
          • Data compression
            • Overview
            • Data encoding and compression
        • Manage memory
          • Overview
          • Memory structure
          • Set the maximum memory for an OceanBase database
          • Manage internal system memory
          • Manage internal tenant memory
          • Manage the memory of the plan cache
          • Memleak-based regular memory leak diagnostics mechanism
          • Query memory usage information
          • Common memory issues
        • Manage processes
          • Overview
          • Multi-tenant threads of OceanBase Database
          • FAQ about multi-tenant threads
          • Background threads of OceanBase Database
        • Manage logs
          • Log overview
          • Log print level
            • Log generation levels
            • Set a log generation level
          • Manage size and quantity of log files
            • Use the log file splitting feature
            • Control the number of log files
          • View logs
            • Query the log of an SQL request
            • Query the log of a previous SQL request by using the SQL Trace feature
      • Manage database objects
        • Overview
        • MySQL mode
          • Manage databases
            • Create a database
            • View databases
            • Modify a database
            • Drop a database
          • Manage tables
            • Overview
            • Create a table
            • Define an auto-increment column
            • Define column constraints
            • Query the definition of a table
            • Modify a table
            • Empty a table
            • Drop a table
            • Lock a table
          • Manage indexes
            • Overview
            • Create an index
            • Query indexes
            • Drop an index
          • Manage views
          • Manage sequence
            • Create a sequence
            • Query sequences
            • Reference a sequence
            • Modify a sequence
            • Drop a sequence
          • Manage triggers
            • Overview
            • Create a DML trigger
            • Query trigger information
            • Drop a trigger
        • Oracle mode
          • Manage tables
            • Overview
            • Create a table
            • Define column constraints
            • Query the definition of a table
            • Modify a table
            • Empty a table
            • Drop a table
            • Lock a table
          • Manage indexes
            • Overview
            • Create an index
            • Query indexes
            • Drop an index
          • Manage views
          • Manage sequences
          • Manage synonyms
          • 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
          • Manage DBLink
            • Create a DBLink
            • View existing DBLinks
            • Use a DBLink to access data in a remote database
            • Use a DBLink to modify data in a remote database
            • Drop a DBLink
      • Manage replicas
        • Manage partitions
          • Oracle mode
            • Overview
            • Create a partitioned table
            • Modify partitioning rules
            • Add a partition
            • Drop partitions
            • Truncate a partition
            • Partition pruning
            • Query data in specified partitions
            • Create partitioned table index
              • Overview
              • Local indexes
              • Global indexes
          • MySQL mode
            • Overview
            • Create a partitioned table
            • Modify partitioning rules
            • Add a partition
            • Drop partitions
            • Truncate a partition
            • Partition pruning
            • Query data in specified partitions
            • Create partitioned table index
              • Overview
              • Local indexes
              • Global indexes
        • Manage replicas
          • Overview
          • Create a replica
          • Edit a tenant replica in a zone
          • Delete a tenant replica from a zone
        • Manage locality
          • Overview
          • Modify tenant locality
      • O&M
        • Scaling
          • Overview
          • Overview
            • Scale out
              • Add zones to a cluster
              • Add OBServer nodes to zones
            • Scale in
              • Delete zones from a cluster
              • Delete OBServer nodes from zones
          • Tenant resource scaling
            • Modify unit_config
            • Modify UNIT_NUM
        • Monitoring and alerting
          • Overview
          • Monitoring
            • Status monitoring
            • Performance monitoring
            • SQL monitoring
          • Alerting
            • Configure an alert channel
            • Alert push
            • Perform alert management
            • Manage general alert rules
        • Performance diagnosis
          • ASH report
            • ASH
            • Generate ASH reports
            • Analyze ASH reports
        • Emergency handling
          • Analysis, diagnostics, and decision-making process
          • Common emergency problem handling
            • Issues related to capacity changes
              • High disk I/O on the node
              • Tenant memory full
    • Performance tuning guide
      • Overview
      • Performance related tools
        • System tools
          • General tool Top
          • CPU tools
          • Memory tools
          • Disk I/O tools
          • Network tools
        • Internal tables
          • GV$SYSSTAT
          • GV$OB_SQL_AUDIT
          • GV$OB_TRANSACTION_PARTICIPANTS
        • Logs
          • slow trans
          • dump tenant info
          • trace log
        • OCP
      • System tuning
        • OS parameter tuning
        • Database parameter tuning
          • CPU parameters
          • I/O parameters
          • Memory-related parameters
          • Network transmission parameters
        • OBProxy parameter tuning
          • CPU parameters
          • Network transmission parameters
          • Route parameters on nodes
      • Business model tuning
        • Load balancing
        • SQL diagnostics
        • Distributed transactions
      • SQL optimization guide
        • SQL request execution process
        • SQL execution plan
          • Introduction to SQL execution plans
          • Execution plan operator
            • TABLE SCAN
            • JOIN
            • COUNT
            • GROUP BY
            • WINDOW FUNCTION
            • SUBPLAN FILTER
            • DISTINCT
            • SEQUENCE
            • MATERIAL
            • SORT
            • LIMIT
            • FOR UPDATE
            • SELECT INTO
            • SUBPLAN SCAN
            • UNION
            • INTERSECT
            • EXCEPT/MINUS
            • INSERT
            • DELETE
            • UPDATE
            • MERGE
            • EXCHANGE
            • GI
          • Plan cache
          • Fast parameterization
          • Real-time execution plan display
        • Distributed execution plan
          • Perform distributed execution and parallel queries
          • Generate a distributed plan
          • Schedule distributed execution plans
          • Manage distributed execution plans
          • Execute parallel queries
          • Perform parameter tuning for a parallel query
          • Parallel DML
        • SQL optimization
          • Overview
          • General procedure of SQL tuning
          • SQL execution performance monitoring
            • GV$OB_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 specified 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 conllection methods
              • Overview
              • Histograms
              • Manual statistics collection
              • Automatic statistics collection
              • Online statistics collection
            • Statistics management
              • Overview
              • Deletion
              • Setting
              • Import and export
              • Locking and unlocking
              • History management
              • Collection strategy prefs management
            • Examples
          • 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
              • Join order
          • Manage execution plans
            • Optimizer hints
            • Plan binding
            • SQL plan management
        • Glossary
        • General issues in SQL tuning
      • Performance testing
        • Run the TPC-H benchmark on OceanBase Database
        • TPC-H benchmark report of OceanBase Database
        • Run the Sysbench benchmark on OceanBase Database
        • Sysbench benchmark report of OceanBase Database
        • Run the TPC-C benchmark on OceanBase Database
        • TPC-C benchmark report of OceanBase Database
    • Application development reference
      • SQL syntax
        • System tenants
          • Overview
          • ALTER SYSTEM
            • BACKUP
            • Log archive
            • BALANCE TASK
            • CANCEL MIGRATE UNIT
            • CHANGE TENANT
            • DELETE BACKUPSET
            • DELETE OBSOLETE BACKUP
            • FAILOVER
            • FLUSH
            • JOB
            • MERGE
            • MIGRATE UNIT
            • PARAMETER
            • RECOVER
            • REFRESH
            • REPLICA
            • RESTORE
            • SERVER
            • SWITCHOVER
            • THROTTLE
            • ZONE
          • ALTER RESOURCE POOL
          • ALTER RESOURCE TENANT
          • ALTER RESOURCE UNIT
          • ALTER TENANT
          • CREATE RESOURCE POOL
          • CREATE RESOURCE UNIT
          • CREATE TENANT
          • DROP RESOURCE POOL
          • DROP RESOURCE UNIT
          • DROP TENANT
          • SET DECRYPTION
          • SET ENCRYPTION
        • Common tenant (MySQL mode)
          • Basis elements
            • Data types
              • Overview
              • Numeric types
                • Overview
                • Integer data types
                • Fixed-point data types
                • Floating-point data types
                • Bit value data type
              • Date and time types
                • Overview
                • DATE, DATETIME, and TIMESTAMP types
                • TIME type
                • YEAR type
              • Character types
                • Overview
                • CHAR and VARCHAR
                • BINARY and VARBINARY
              • Large objects and text types
                • Overview
                • BLOB types
                • TEXT types
              • ENUM data type
              • SET data type
              • JSON data types
                • Overview
                • Create a JSON value
                • Query and modify JSON values
                • Convert a JSON data type
              • Spatial data types
                • Overview
                • SRS
                • Create a spatial column
                • Create a spatial index
                • Spatial data formats
            • Expressions
              • Overview
              • Expression syntax
              • Convert data types in expression evaluation
            • Character set and collation
              • Overview
              • Character sets
              • Collations
              • Database-level character sets and collations
              • Table-level character sets and collations
              • Column-level character sets and collations
              • Character sets and collations for character expressions
              • Character sets and collations for client connection
            • Literal
              • Overview
              • Strings
              • Value
              • Datetime values
              • Bit values
              • Boolean
              • NULLs
            • Schema object names
            • User-defined variables
            • Comments
          • Operator
            • Overview
            • Operator precedence
            • Arithmetic operators
            • Bitwise operators
            • Comparison operators
            • Logical operators
            • Assignment operators
            • Datetime operators
            • Concatenation operators
            • BINARY operator
            • CASE conditional operator
          • Sequence pseudocolumns
          • Function
            • Overview
            • Single-row functions
              • Date and time 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
                • LCASE
                • LEFT
                • LENGTH
                • LOCATE
                • LOWER
                • LPAD
                • LTRIM
                • MAKE_SET
                • MID
                • OCT
                • OCTET_LENGTH
                • ORD
                • POSITION
                • QUOTE
                • REGEXP
                • REGEXP_INSTR
                • REGEXP_LIKE
                • REGEXP_REPLACE
                • REGEXP_SUBSTR
                • REPEAT
                • REPLACE
                • REVERSE
                • RIGHT
                • RLIKE
                • RPAD
                • RTRIM
                • SPACE
                • STRCMP
                • SUBSTR
                • SUBSTRING
                • SUBSTRING_INDEX
                • TRIM
                • UCASE
                • UNHEX
                • UPPER
                • WEIGHT_STRING
                • TO_BASE64
                • FROM_BASE64
                • SOUNDEX
              • Conversion functions
                • CAST
                • CONVERT
                • SCN_TO_TIMESTAMP
                • TIMESTAMP_TO_SCN
              • Mathematical functions
                • ABS
                • ACOS
                • ASIN
                • ATAN
                • ATAN2
                • BIT_COUNT
                • CEIL
                • CEILING
                • CONV
                • COS
                • COT
                • CRC32
                • DEGREES
                • EXP
                • FLOOR
                • LN
                • LOG
                • LOG10
                • LOG2
                • MOD
                • NEG
                • PI
                • POW
                • POWER
                • RADIANS
                • RAND
                • ROUND
                • SIGN
                • SIN
                • SQRT
                • TAN
                • TRUNCATE
              • Comparison functions
                • GREATEST
                • INTERVAL
                • ISNULL
                • LEAST
              • Process control functions
                • CASE
                • IF
                • IFNULL
                • NULLIF
                • ORA_DECODE
            • Aggregation 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
              • 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
              • MD5
              • UNCOMPRESS
              • UNCOMPRESSED_LENGTH
              • RANDOM_BYTES
              • SHA
              • SHA1
              • SHA2
              • VALIDATE_PASSWORD_STRENGTH
            • Information functions
              • BENCHMARK
              • CHARSET
              • COERCIBILITY
              • COLLATION
              • CONNECTION_ID
              • CURRENT_USER
              • DATABASE
              • FOUND_ROWS
              • LAST_INSERT_ID
              • ICU_VERSION
              • ROW_COUNT
              • SCHEMA
              • SESSION_USER
              • SYSTEM_USER
              • USER
              • VERSION
              • OB_VERSION
            • JSON functions
              • Create JSON text
                • JSON_ARRAY
                • JSON_OBJECT
                • JSON_QUOTE
              • Search JSON text
                • JSON_CONTAINS
                • JSON_CONTAINS_PATH
                • JSON_EXTRACT
                • JSON_KEYS
                • JSON_OVERLAPS
                • JSON_SEARCH
                • JSON_VALUE
                • MEMBER OF
              • Modify JSON text
                • JSON_ARRAY_APPEND
                • JSON_ARRAY_INSERT
                • JSON_INSERT
                • JSON_MERGE
                • JSON_MERGE_PATCH
                • JSON_MERGE_PRESERVE
                • JSON_REMOVE
                • JSON_REPLACE
                • JSON_SET
                • JSON_UNQUOTE
              • Return JSON text properties
                • JSON_DEPTH
                • JSON_LENGTH
                • JSON_TYPE
                • JSON_VALID
              • JSON utility functions
                • JSON_PRETTY
                • JSON_STORAGE_SIZE
              • JSON aggregation functions
                • JSON_ARRAYAGG
                • JSON_OBJECTAGG
            • Spatial functions
              • Create a geometric function
              • Spatial operation functions
              • Spatial relation functions
              • Geometry property functions
              • Geometric format conversion functions
          • Queries and subqueries
            • Overview
            • Subquery
            • JOIN
          • SQL statements
            • General syntax
            • CTE
            • ALTER DATABASE
            • ALTER OUTLINE
            • ALTER SEQUENCE
            • MERGE
            • ALTER TABLE
            • ALTER TABLEGROUP
            • ALTER USER
            • ALTER VIEW
            • ANALYZE
            • CREATE DATABASE
            • CREATE INDEX
            • CREATE OUTLINE
            • CREATE SEQUENCE
            • CREATE TABLE
            • CREATE TABLEGROUP
            • CREATE USER
            • CREATE VIEW
            • DEALLOCATE PREPARE
            • DELETE
            • DESCRIBE
            • DROP DATABASE
            • DROP INDEX
            • DROP OUTLINE
            • DROP TABLE
            • DROP TABLEGROUP
            • DROP SEQUENCE
            • DROP USER
            • DROP VIEW
            • EXECUTE
            • EXPLAIN
            • FLASHBACK
            • GRANT
            • HELP
            • INSERT
            • KILL
            • LOAD DATA
            • LOCK TABLES
            • MERGE
            • OPTIMIZE
            • PREPARE
            • PURGE
            • PURGE RECYCLEBIN
            • RENAME USER
            • RENAME TABLE
            • REPLACE
            • REVOKE
            • SAVEPOINT
            • SCHEMA
            • SELECT INTO
            • SELECT
              • SELECT
              • JOIN clause
              • OVER clause
              • UNION clause
            • SET
            • SET CHARSET
            • SET NAMES
            • SET PASSWORD
            • SET TRANSACTION
            • SHOW
            • TRANSACTION
            • TRUNCATE TABLE
            • UPDATE
            • USE
          • DDL features
            • Overview
            • Index operations
            • Primary key operations
            • Column operations
            • Column generation operations
            • Foreign key operations
            • Table operations
            • Partition operations
            • Column type change rules
          • Performance schema functions
            • FORMAT_BYTES
            • FORMAT_PICO_TIM
          • 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
            • NVL
            • UUID_TO_BIN
            • SLEEP
            • UUID
            • UUID_SHORT
            • VALUES
        • Common tenant (Oracle mode)
          • Introduction to SQL
          • Pseudo column
            • Overview
            • Hierarchical query pseudocolumns
            • Sequence pseudocolumns
            • ORA_ROWSCN pseudocolumn
            • ROWNUM pseudocolumn
            • ROWID pseudocolumn
          • 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
              • Date and time and interval data types
                • Overview
                • DATE type
                • TIMESTAMP type
                • TIMESTAMP WITH TIME ZONE date 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
              • Rowid data types
              • User-defined data types
              • Any type
              • JSON data types
                • Overview
                • Create JSON columns
                • Query JSON data
                • Conversion rules for JSON data types
            • 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
            • Literal
              • Overview
              • Text literals
              • Numeric literals
              • Date and time literal
                • 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
            • Annotation
              • Overview
              • Comments within SQL statements
              • Comments on schema and nonschema objects
              • Hint
                • Overview
                • Hint list
                  • Hints related to access path
                  • Hints related to join orders
                  • Hints related to joins
                  • Hints related to parallel execution
                  • Hints related to query strategy
                  • Hints related to query conversion
                  • Other hints
            • Database objects
              • Schema objects
              • Non-schema objects
            • Database naming conventions
              • Overview
              • Suggestions on schema object names
            • Database object reference method
              • Overview
              • Reference to schema objects
              • Reference objects in remote databases
                • Create a database link
                • Reference a database link
              • Reference to partition tables and indexes
              • Reference an attribute or method of an object type
          • Operator
            • Overview
            • Operator precedence
            • Arithmetic operators
            • Concatenation operator
            • Hierarchical query operators
            • Set operators
            • COLLATE operator
          • Function
            • Overview
            • Single-row functions
              • Numeric functions
                • ABS
                • ACOS
                • ASIN
                • ATAN
                • ATAN2
                • BITAND
                • CEIL
                • COS
                • COSH
                • EXP
                • FLOOR
                • LN
                • LOG
                • MOD
                • NANVL
                • POWER
                • REMAINDER
                • ROUND
                • SIGN
                • SIN
                • SINH
                • SQRT
                • TAN
                • TANH
                • TRUNC
                • WIDTH_BUCKET
              • String functions returning strings
                • CHR
                • CONCAT
                • INITCAP
                • LOWER
                • LPAD
                • LTRIM
                • NLS_LOWER
                • NLS_UPPER
                • REGEXP_REPLACE
                • REGEXP_SUBSTR
                • REPLACE
                • RPAD
                • RTRIM
                • SUBSTR
                • TRANSLATE
                • TRANSLATE ... USING
                • TRIM
                • UPPER
              • String functions returning numbers
                • ASCII
                • INSTR
                • LENGTH
                • REGEXP_COUNT
                • REGEXP_INSTR
              • Date and time
                • 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
                  • JSON_ARRAY
                  • JSON_OBJECT
                  • JSON_ARRAYAGG
                  • JSON_OBJECTAGG
                • Query JSON text
                  • JSON_VALUE
                  • JSON_QUERY
                  • JSON_EXISTS
                  • JSON_TABLE
                • Validate JSON text
                  • JSON_EQUAL
                • Modify JSON text
                  • JSON_MERGEPATCH
            • Aggregation 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
            • Analysis functions
              • Analytic functions
              • 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
          • 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 query
            • Hierarchical query
            • Compound query
            • Join queries
            • Subqueries
            • DUAL table query
          • SQL statements
            • DDL
              • ALTER INDEX
              • ALTER KEYSTORE
              • ALTER OUTLINE
              • ALTER PROFILE
              • ALTER ROLE
              • ALTER SEQUENCE
              • ALTER SESSION
              • ALTER SYSTEM FLUSH PLAN CACHE
              • ALTER SYSTEM PARAMETER
              • ALTER TABLE
              • ALTER TABLEGROUP
              • ALTER USER
              • CREATE CONTEXT
              • CREATE DIRECTORY
              • CREATE DATABASE LINK
              • CREATE INDEX
              • CREATE KEYSTORE
              • CREATE OUTLINE
              • CREATE PROFILE
              • CREATE ROLE
              • CREATE SEQUENCE
              • CREATE SYNONYM
              • CREATE TABLE
              • CREATE TABLEGROUP
              • CREATE TABLESPACE
              • CREATE USER
              • CREATE VIEW
              • DROP CONTEXT
              • DROP DIRECTORY
              • DROP INDEX
              • DROP OUTLINE
              • DROP PROFILE
              • DROP ROLE
              • DROP SEQUENCE
              • DROP SYNONYM
              • DROP TABLE
              • DROP TABLEGROUP
              • DROP TABLESPACE
              • DROP USER
              • DROP VIEW
              • RENAME
              • TRUNCATE TABLE
              • ALTER SYSTEM MAJOR FREEZE
            • DML
              • DELETE
              • INSERT
              • MERGE
              • PURGE
              • SELECT
                • SIMPLE SELECT
                • Set-based SELECT
                • WITH CLAUSE
              • UPDATE
            • DCL
              • ANALYZE
              • AUDIT
              • COMMENT
              • COMMIT
              • EXPLAIN
              • FLASHBACK TABLE BEFORE DROP
              • GRANT
              • KILL
              • LOAD DATA
              • LOCK TABLE
              • REVOKE
              • ROLLBACK
              • SAVEPOINT
              • SET NAMES
              • SET PASSWORD
              • SET ROLE
              • SET VARIABLE
              • SHOW
              • SHRINK
              • TRANSACTION
          • DDL features
            • Overview
            • Index operations
            • Primary key operations
            • Column operations
            • Column generation operations
            • Foreign key operations
            • Table operations
            • Partition operations
            • Column type change rules
      • SQL practices and suggestions
        • Limits on writing SQL statements
        • SQL writing guidelines
          • SELECT statements
          • DML statements
          • Multi-table join statements
          • Table scan
          • Transactions
          • Cache
          • Hint
          • Other specifications
        • SQL statement examples
          • Implicit data type conversion
          • JOIN tables
          • Weak consistency read
          • Pagination queries
      • PL reference
        • What is PL
          • Overview
          • Main features of PL
          • PL architecture
        • MySQL mode
          • Syntax of PL stored programs
          • PL stored procedure
            • Overview
            • Variables in stored programs
            • Stored procedures
            • Stored functions
            • Trigger
            • Limitations on stored programs
          • PL cursor
            • Overview
            • Cursor execution process
            • Limitations on server cursors
          • PL conditional control statements
            • CASE
            • IF
            • ITERATE
            • LEAVE
            • LOOP
            • REPEAT
            • RETURN
            • WHILE
          • PL DML statements
            • CALL
            • DO
          • PL DDL 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
            • Effective scope of an exception handler
            • Diagnostics area
            • Exception handling and OUT/INOUT parameters
            • Limitations on exception handling
          • PL system package
            • Overview
            • 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_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_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
              • 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_TABLE_PREFS
              • UNLOCK_PARTITION_STATS
              • UNLOCK_SCHEMA_STATS
              • UNLOCK_TABLE_STATS
            • DBMS_UDR
              • Overview
              • CREATE_RULE
              • DISABLE_RULE
              • ENABLE_RULE
              • REMOVE_RULE
            • DBMS_XPLAN
              • Overview
              • DISABLE_OPT_TRACE
              • ENABLE_OPT_TRACE
              • SET_OPT_TRACE_PARAMETER
          • Reserved and non-reserved PL keywords
        • Oracle mode
          • PL language basics
            • Character sets
            • Lexical units
            • Declaration
            • Reference identifiers
            • Scope and visibility of identifiers
            • Assign values
            • 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 constructor function
            • Collection methods
              • Overview of collection methods
              • 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
            • Cursor
              • Overview
              • Cursor attributes
              • Implicit cursors
              • Explicit cursors
              • Cursor variables
              • Traverse cursor data by using the FOR loop
              • Modify and drop a cursor
            • Transaction processing and control
            • Autonomous transactions
              • Overview
              • Control autonomous transactions
              • Autonomous triggers
              • Call autonomous functions from SQL statements
          • PL dynamic SQL
            • Overview
            • Execute dynamic SQL statements
            • DBMS_SQL system package
          • PL stored procedure 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 user-defined aggregate functions
              • Use user-defined aggregate functions
          • PL trigger
            • Overview
            • Create a DML trigger
            • Modify and drop a trigger
            • Disable or enable a trigger
            • Query trigger information
            • INSTEAD OF DML trigger
            • Compound DML trigger
          • PL package
            • Overview
            • Create a program package
            • Overloaded programs in a package
            • Manage program packages
            • Definition of the PL environment by the STANDARD package
          • PL exception handling
            • Overview
            • Compile-Time alerts
            • 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 of label security PL packages
            • SA_SYSDBA
              • SA_SYSDBA overview
              • SA_SYSDBA.ALTER_POLICY
              • SA_SYSDBA.CREATE_POLICY
              • SA_SYSDBA.DROP_POLICY
            • SA_COMPONENTS
              • SA_COMPONENTS overview
              • SA_COMPONENTS.ALTER_LEVEL
              • SA_COMPONENTS.CREATE_LEVEL
              • SA_COMPONENTS.DROP_LEVEL
            • SA_LABEL_ADMIN
              • SA_LABEL_ADMIN overview
              • SA_LABEL_ADMIN.ALTER_LABEL
              • SA_LABEL_ADMIN.CREATE_LABEL
              • SA_LABEL_ADMIN.DROP_LABEL
            • SA_POLICY_ADMIN
              • SA_POLICY_ADMIN 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
              • SA_USER_ADMIN overview
              • SA_USER_ADMIN.SET_LEVELS
            • SA_SESSION
              • SA_SESSION 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
              • OPEN
              • READ
              • SUBSTR
              • TRIM
              • WRITE
              • WRITEAPPEND
            • DBMS_LOCK
              • Overview
              • SLEEP
            • DBMS_METADATA
              • Overview
              • GET_DDL
            • DBMS_OUTPUT
              • Overview
              • DISABLE
              • ENABLE
              • GET_LINE
              • GET_LINES
              • NEW_LINE
              • PUT
              • PUT_LINE
            • DBMS_PLAN_CACHE
              • Overview
              • PURGE
            • 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_PROGRAM
              • DEFINE_PROGRAM_ARGUMENT
              • DISABLE
              • DROP_JOB
              • DROP_PROGRAM
              • ENABLE
              • GENERATE_JOB_NAME
              • RUN_JOB
              • SET_ATTRIBUTE
              • SET_JOB_ARGUMENT_VALUE
            • DBMS_SESSION
              • Overview
              • CLEAR_ALL_CONTEXT
              • CLEAR_CONTEXT
              • CLEAR_IDENTIFIER
              • SET_CONTEXT
              • SET_IDENTIFIER
            • DBMS_SQL
              • Overview
              • BIND_VARIABLE
              • CLOSE_CURSOR
              • COLUMN_VALUE
              • DEFINE_COLUMN
              • DEFINE_ARRAY
              • DESCRIBE_COLUMNS
              • EXECUTE
              • EXECUTE_AND_FETCH
              • FETCH_ROWS
              • IS_OPEN
              • OPEN_CURSOR
              • PARSE
            • 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_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
              • 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_TABLE_PREFS
              • UNLOCK_PARTITION_STATS
              • UNLOCK_SCHEMA_STATS
              • UNLOCK_TABLE_STATS
            • DBMS_UDR
              • Overview
              • CREATE_RULE
              • DISABLE_RULE
              • ENABLE_RULE
              • REMOVE_RULE
            • DBMS_UTILITY
              • Overview
              • ACTIVE_INSTANCES
              • COMMA_TO_TABLE
              • 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
            • 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_XPLAN
              • Overview
              • DISABLE_OPT_TRACE
              • ENABLE_OPT_TRACE
              • SET_OPT_TRACE_PARAMETER
            • 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_RAW
              • Overview
              • 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
            • ANYDATA TYPE
              • Overview
              • BEGINCREATE static procedure
              • ENDCREATE member procedure
              • GET* member functions
              • GETTYPE member function
              • GETTYPENAME member function
              • PIECEWISE member procedure
              • SET* member procedures
            • XMLType
              • Overview
              • CREATEXML
              • GETCLOBVAL
              • GETSTRINGVAL
              • TRANSFORM
              • XMLTYPE
          • Reserved PL keywords
      • Database design guidelines
        • Object naming conventions
          • Overview
          • Tenant naming conventions
          • User naming conventions
          • Table naming conventions
          • Field naming conventions
          • Other naming conventions
        • Object structure design guidelines
          • Field design
          • Table structure design
          • Partitioned table design
          • Index design
          • Other structural designs
        • Character set specifications
        • Database connection specifications
        • Use of comments
        • ORM conventions
        • Exception handling
      • TableAPI
        • Introduction to TableAPI implementation
          • Implementation of TableAPI
          • Differences between replace and insert_or_update
          • TableAPI data models
        • Using TableAPI client
          • Introduction to the client and instructions for use
          • Set client parameters
          • An example of client use
        • Troubleshooting
      • HBaseAPI
        • HBaseAPI solution introduction
        • HBaseAPI storage model
        • Usage instructions of the HBaseAPI client
    • System reference
      • System parameters
        • Overview
        • Summary of system parameters
        • Cluster level
          • all_cluster_list
          • all_server_list
          • 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_dest_option
          • backup_concurrency
          • backup_dest
          • backup_data_file_size
          • 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_idle_time
          • 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_disk_utilization_threshold
          • clog_expire_days
          • clog_cache_priority
          • clog_disk_usage_limit_percentage
          • clog_sync_time_warn_threshold
          • clog_transport_compress_func
          • cpu_reserved
          • cluster
          • cluster_id
          • config_additional_dir
          • cpu_count
          • data_copy_concurrency
          • data_dir
          • data_disk_usage_limit_percentage
          • data_storage_error_tolerance_time
          • data_storage_warning_tolerance_time
          • datafile_disk_percentage
          • datafile_size
          • dead_socket_detection_timeout
          • debug_sync_timeout
          • default_compress
          • default_compress_func
          • default_transport_compress_func
          • default_row_format
          • devname
          • disk_io_thread_count
          • dtl_buffer_size
          • election_cpu_quota
          • election_blacklist_interval
          • enable_auto_refresh_location_cache
          • enable_auto_refresh_location_cache
          • enable_auto_leader_switch
          • enable_ddl
          • enable_global_freeze_trigger
          • enable_log_archive
          • enable_election_group
          • enable_major_freeze
          • enable_merge_by_turn
          • enable_manual_merge
          • enable_ob_ratelimit
          • enable_one_phase_commit
          • enable_perf_event
          • enable_pg
          • enable_rebalance
          • enable_record_trace_id
          • enable_record_trace_log
          • enable_rereplication
          • enable_rich_error_msg
          • enable_separate_sys_clog
          • enable_smooth_leader_switch
          • enable_rootservice_standalone
          • enable_sql_audit
          • enable_sql_operator_dump
          • enable_sys_table_ddl
          • enable_sys_unit_standalone
          • enable_syslog_recycle
          • enable_syslog_wf
          • enable_tcp_keepalive
          • fast_recovery_concurrency
          • enable_upgrade_mode
          • flush_log_at_trx_commit
          • gc_wait_archive
          • fuse_row_cache_priority
          • global_index_build_single_replica_timeout
          • global_major_freeze_residual_memory
          • get_leader_candidate_rpc_timeout
          • global_write_halt_residual_memory
          • high_priority_net_thread_count
          • ignore_replay_checksum_error
          • ignore_replica_checksum_error
          • index_clog_cache_priority
          • index_info_block_cache_priority
          • index_cache_priority
          • ilog_index_expire_time
          • internal_sql_execute_timeout
          • large_query_threshold
          • large_query_worker_percentage
          • leak_mod_to_check
          • lease_time
          • location_cache_cpu_quota
          • location_cache_priority
          • location_cache_expire_time
          • 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
          • 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
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          • # rootservice_list
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          • server_check_interval
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      • System variables
        • Overview
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      • System views (MySQL mode)
        • Overview
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          • Dictionary views overview
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          • information_schema.ENGINES
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          • information_schema.SCHEMATA
          • information_schema.SESSION_STATUS
          • information_schema.SESSION_VARIABLES
          • information_schema.STATISTICS
          • information_schema.TABLES
          • information_schema.TABLE_CONSTRAINTS
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          • information_schema.VIEW_TABLE_USAGE
          • information_schema.VIEWS
          • mysql.db
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          • mysql.user
          • oceanbase.DBA_IND_PARTITIONS
          • oceanbase.DBA_IND_SUBPARTITIONS
          • oceanbase.DBA_OB_DATABASES
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          • oceanbase.DBA_OB_SERVERS
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          • oceanbase.DBA_OB_TABLEGROUP_SUBPARTITIONS
          • oceanbase.DBA_OB_TABLEGROUP_TABLES
          • oceanbase.DBA_OB_TABLEGROUPS
          • oceanbase.DBA_OB_TABLET_TO_LS
          • oceanbase.DBA_OB_TENANT_JOBS
          • oceanbase.DBA_OB_TENANTS
          • oceanbase.DBA_OB_UNIT_JOBS
          • oceanbase.DBA_OB_UNIT_CONFIGS
          • oceanbase.DBA_OB_UNITS
          • oceanbase.DBA_OB_ZONE_MAJOR_COMPACTION
          • oceanbase.DBA_OB_ZONES
          • oceanbase.DBA_OBJECTS
          • oceanbase.DBA_PART_INDEXES
          • oceanbase.DBA_PART_KEY_COLUMNS
          • oceanbase.DBA_PART_TABLES
          • oceanbase.DBA_OB_SEQUENCE_OBJECTS
          • oceanbase.DBA_SUBPART_KEY_COLUMNS
          • oceanbase.DBA_SUBPARTITION_TEMPLATES
          • oceanbase.DBA_TAB_PARTITIONS
          • oceanbase.DBA_TAB_SUBPARTITIONS
          • oceanbase.CDB_IND_COLUMNS
          • oceanbase.CDB_IND_PARTITIONS
          • oceanbase.CDB_IND_SUBPARTITIONS
          • oceanbase.CDB_INDEXES
          • oceanbase.CDB_OB_ARCHIVELOG_PIECE_FILES
          • oceanbase.CDB_OB_DATABASES
          • oceanbase.CDB_OB_LS_LOCATIONS
          • oceanbase.CDB_OB_MAJOR_COMPACTION
          • oceanbase.CDB_OB_RESTORE_HISTORY
          • oceanbase.CDB_OB_RESTORE_PROGRESS
          • oceanbase.CDB_OB_TABLEGROUP_PARTITIONS
          • oceanbase.CDB_OB_TABLEGROUP_SUBPARTITIONS
          • oceanbase.CDB_OB_TABLEGROUP_TABLES
          • oceanbase.CDB_OB_TABLEGROUPS
          • oceanbase.CDB_OB_TABLET_REPLICAS
          • oceanbase.CDB_OB_TABLET_TO_LS
          • oceanbase.CDB_OB_ZONE_MAJOR_COMPACTION
          • oceanbase.CDB_OBJECTS
          • oceanbase.CDB_PART_INDEXES
          • oceanbase.CDB_PART_KEY_COLUMNS
          • oceanbase.CDB_PART_TABLES
          • 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_OB_BACKUP_SET_FILES
          • oceanbase.DBA_OB_BACKUP_SET_FILES
          • oceanbase.CDB_OB_BACKUP_JOBS
          • oceanbase.DBA_OB_BACKUP_JOBS
          • oceanbase.CDB_OB_BACKUP_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_JOB_HISTORY
          • oceanbase.CDB_OB_BACKUP_TASKS
          • oceanbase.DBA_OB_BACKUP_TASKS
          • oceanbase.CDB_OB_BACKUP_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_TASK_HISTORY
          • oceanbase.DBA_OB_ARCHIVELOG_PIECE_FILES
          • oceanbase.DBA_OB_RESTORE_PROGRESS
          • oceanbase.DBA_OB_RESTORE_HISTORY
          • oceanbase.CDB_OB_ARCHIVE_DEST
          • oceanbase.DBA_OB_ARCHIVE_DEST
          • oceanbase.CDB_OB_ARCHIVELOG
          • oceanbase.DBA_OB_ARCHIVELOG
          • oceanbase.CDB_OB_ARCHIVELOG_SUMMARY
          • oceanbase.DBA_OB_ARCHIVELOG_SUMMARY
          • oceanbase.CDB_OB_BACKUP_PARAMETER
          • oceanbase.DBA_OB_BACKUP_PARAMETER
          • oceanbase.DBA_OB_OUTLINE_CONCURRENT_HISTORY
          • oceanbase.DBA_OB_OUTLINES
          • oceanbase.DBA_OB_CONCURRENT_LIMIT_SQL
          • oceanbase.CDB_OB_SYS_VARIABLES
          • oceanbase.CDB_OB_BACKUP_DELETE_JOBS
          • oceanbase.DBA_OB_BACKUP_DELETE_JOBS
          • oceanbase.CDB_OB_BACKUP_DELETE_JOB_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_JOB_HISTORY
          • oceanbase.CDB_OB_BACKUP_DELETE_TASKS
          • oceanbase.DBA_OB_BACKUP_DELETE_TASKS
          • oceanbase.CDB_OB_BACKUP_DELETE_TASK_HISTORY
          • oceanbase.DBA_OB_BACKUP_DELETE_TASK_HISTORY
          • oceanbase.CDB_OB_BACKUP_STORAGE_INFO
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO
          • oceanbase.CDB_OB_BACKUP_STORAGE_INFO_HISTORY
          • oceanbase.DBA_OB_BACKUP_STORAGE_INFO_HISTORY
          • oceanbase.CDB_OB_BACKUP_DELETE_POLICY
          • oceanbase.DBA_OB_BACKUP_DELETE_POLICY
          • oceanbase.CDB_OB_DEADLOCK_EVENT_HISTORY
          • oceanbase.DBA_OB_DEADLOCK_EVENT_HISTORY
          • oceanbase.CDB_OB_COLUMN_CHECKSUM_ERROR_INFO
          • oceanbase.CDB_OB_TABLET_CHECKSUM_ERROR_INFO
          • oceanbase.DBA_TAB_STATISTICS
          • oceanbase.DBA_TAB_COL_STATISTICS
          • oceanbase.DBA_PART_COL_STATISTICS
          • oceanbase.DBA_SUBPART_COL_STATISTICS
          • oceanbase.DBA_TAB_HISTOGRAMS
          • oceanbase.DBA_PART_HISTOGRAMS
          • oceanbase.DBA_SUBPART_HISTOGRAMS
          • oceanbase.DBA_TAB_STATS_HISTORY
          • oceanbase.DBA_SCHEDULER_JOBS
          • oceanbase.DBA_IND_STATISTICS
          • oceanbase.DBA_TAB_MODIFICATIONS
          • oceanbase.DBA_SQL_PLAN_BASELINES
          • oceanbase.DBA_SQL_MANAGEMENT_CONFIG
          • information_schema.QUERY_RESPONSE_TIME
          • oceanbase.CDB_OB_LS
          • oceanbase.DBA_OB_LS
          • oceanbase.CDB_OB_TABLE_LOCATIONS
          • oceanbase.DBA_OB_TABLE_LOCATIONS
          • oceanbase.DBA_OB_SERVER_EVENT_HISTORY
          • oceanbase.CDB_OB_FREEZE_INFO
          • oceanbase.DBA_OB_FREEZE_INFO
          • oceanbase.DBA_OB_LS_REPLICA_TASKS
          • oceanbase.CDB_OB_LS_REPLICA_TASKS
          • oceanbase.DBA_OB_AUTO_INCREMENT
          • oceanbase.CDB_OB_AUTO_INCREMENT
          • oceanbase.DBA_SEQUENCES
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          • oceanbase.DBA_OB_USERS
          • oceanbase.CDB_OB_USERS
          • oceanbase.DBA_OB_DATABASE_PRIVILEGE
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          • oceanbase.DBA_OB_USER_DEFINED_RULES
          • oceanbase.DBA_OB_TENANTS
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          • oceanbase.DBA_OB_LS_LOG_ARCHIVE_PROGRESS
          • oceanbase.DBA_OB_ARBITRATION_SERVICE
          • oceanbase.CDB_OB_LS_ARB_REPLICA_TASKS
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASKS
          • oceanbase.CDB_OB_LS_ARB_REPLICA_TASK_HISTORY
          • oceanbase.DBA_OB_LS_ARB_REPLICA_TASK_HISTORY
          • information_schema.ST_GEOMETRY_COLUMNS
          • information_schema.ST_SPATIAL_REFERENCE_SYSTEMS
          • oceanbase.DBA_OB_CLUSTER_EVENT_HISTORY
          • oceanbase.DBA_OB_RSRC_IO_DIRECTIVES
          • oceanbase.DBA_RSRC_PLANS
          • oceanbase.DBA_RSRC_PLAN_DIRECTIVES
          • oceanbase.DBA_RSRC_GROUP_MAPPINGS
          • oceanbase.DBA_RSRC_CONSUMER_GROUPS
        • Performance views
          • Overview
          • GV$OB_COMPACTION_DIAGNOSE_INFO
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          • GV$SESSION_EVENT
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          • GV$OB_SERVER_SCHEMA_INFO
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          • GV$OB_SSTABLES
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          • V$OB_TRANSACTION_PARTICIPANTS
          • V$OB_UNITS
          • V$STATNAME
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          • V$SESSION_WAIT_HISTORY
          • V$SESSTAT
          • V$SYSTEM_EVENT
          • V$OB_MEMORY
          • V$OB_MEMSTORE
          • V$OB_PLAN_CACHE_STAT
          • V$OB_PLAN_CACHE_PLAN_STAT
          • V$OB_PLAN_CACHE_PLAN_EXPLAIN
          • V$OB_SQL_AUDIT
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          • V$SQL_PLAN_MONITOR
          • V$SESSION_LONGOPS
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          • V$OB_PX_WORKER_STAT
          • V$OB_PS_STAT
          • V$OB_PS_ITEM_INFO
          • V$SQL_WORKAREA
          • V$SQL_WORKAREA_ACTIVE
          • V$SQL_WORKAREA_HISTOGRAM
          • V$OB_SQL_WORKAREA_MEMORY_INFO
          • V$OB_SERVER_SCHEMA_INFO
          • V$OB_MERGE_INFO
          • V$SQL_MONITOR_STATNAME
          • V$OB_ENCRYPTED_TABLES
          • V$ENCRYPTED_TABLESPACES
          • V$OB_SSTABLES
          • V$OB_TENANT_MEMORY
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          • GV$OB_MEMSTORE_INFO
          • V$OB_MEMSTORE_INFO
          • GV$OB_IO_CALIBRATION_STATUS
          • V$OB_IO_CALIBRATION_STATUS
          • GV$OB_IO_BENCHMARK
          • V$OB_IO_BENCHMARK
          • GV$SYSSTAT
          • V$SYSSTAT
          • V$SESSION_EVENT
          • GV$ACTIVE_SESSION_HISTORY
          • V$ACTIVE_SESSION_HISTORY
          • GV$DML_STATS
          • V$DML_STATS
          • GV$OB_LOG_STAT
          • V$OB_LOG_STAT
          • GV$OB_DTL_INTERM_RESULT_MONITOR
          • V$OB_DTL_INTERM_RESULT_MONITOR
          • V$OB_LS_REPLICA_TASK_PLAN
          • V$OB_ARCHIVE_DEST_STATUS
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ORA-10000 to ORA-19999

Last Updated:2023-08-18 07:17:13  Updated
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What is on this page
ORA-12401: invalid label string
ORA-12416: policy string not found
ORA-12432: LBAC error: %s
ORA-12444: policy already applied to table
ORA-12447: policy role already exists for policy string
ORA-12461: undefined level string for policy string
ORA-12462: undefined compartment string for policy string
ORA-12463: undefined group string for policy string
ORA-12470: NULL or invalid user label: %s
ORA-12702: invalid NLS parameter string used in SQL function
ORA-12704: COLLATION '%.*s' is not valid for CHARACTER SET '%.*s'
ORA-12704: character set mismatch
ORA-12705: Cannot access NLS data files or invalid environment specified
ORA-12725: unmatched parentheses in regular expression
ORA-12726: unmatched bracket in regular expression
ORA-12727: invalid back reference in regular expression
ORA-12728: invalid range in regular expression
ORA-12729: invalid character class in regular expression
ORA-12731: invalid collation class in regular expression
ORA-12801: error signaled in parallel query server
ORA-12827: insufficient parallel query worker available
ORA-12899: value too large for column '%.*s' at row %ld
ORA-12991: column is referenced in a multi-column constraint
ORA-12991: column \'%.*s\' is referenced in a multi-column constraint \'%.*s\'
ORA-12992: cannot drop parent key column
ORA-13207: incorrect use of the ['%.*s'] operator
ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
ORA-14036: partition bound value too large for column
ORA-14037: partition bound of partition '%.*s' is too high
ORA-14047: ALTER TABLE|INDEX RENAME may not be combined with other operations
ORA-14060: data type or length of a table partitioning column may not be changed
ORA-14074: partition bound must collate higher than that of the last partition
ORA-14100: partition extended table name cannot refer to a remote object
ORA-14109: partition-extended object names may only be used with tables and editioning views
ORA-14159: duplicate subpartition name
ORA-14170: cannot specify <(sub)partition-description> clause in CREATE TABLE or CREATE INDEX
ORA-14214: VALUES (<value list>) cannot be used for Range subpartitioned tables
ORA-14217: VALUES (<value list>) clause expected
ORA-14251: Specified subpartition does not exist
ORA-14253: table is not partitioned by composite partition method
ORA-14265: data type or length of a table subpartitioning column may not be changed
ORA-14300: partitioning key maps to a partition outside maximum permitted number of partitions
ORA-14308: partition bound element must be one of: string, datetime or interval literal, number, or NULL
ORA-14310: VALUES LESS THAN or AT clause cannot be used with List partitioned tables
ORA-14311: Expecting VALUES LESS THAN or AT clause
ORA-14312: invalid time limit specified
ORA-14318: DEFAULT partition must be last partition specified
ORA-14400: inserted partition key does not map to any partition
ORA-14402: updating partition key column would cause a partition change
ORA-14501: object is not partitioned
ORA-14551: cannot perform a DML operation inside a query
ORA-14552: cannot perform a DDL commit or rollback inside a query or DML tips
ORA-14750: Range partitioned table with INTERVAL clause has more than one column
ORA-14751: Invalid data type for partitioning column of an interval partitioned table
ORA-14752: Interval expression is not a constant of the correct type
ORA-14753: Interval cannot be zero
ORA-14757: Table is already a range partitioned table
ORA-14758: Last partition in the range section cannot be dropped
ORA-14759: SET INTERVAL is not legal on this table
ORA-14760: ADD PARTITION is not permitted on Interval partitioned objects
ORA-14761: MAXVALUE partition cannot be specified for Interval partitioned objects
ORA-14767: Cannot specify this interval with existing high bounds
ORA-16000: standby tenant is read only

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Applicability

This topic applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition provides only MySQL mode.

ORA-12401: invalid label string

  • Error code in OceanBase Database: 5696

  • SQLSTATE: HY000

  • Cause: The strategy cannot convert the label string into a valid internal label.

  • Solution: Correct the syntax of the label string.

ORA-12416: policy string not found

  • Error code in OceanBase Database: 5695

  • SQLSTATE: HY000

  • Cause: The specified strategy does not exist in the database.

  • Solution: Enter a correct strategy name or create a strategy.

ORA-12432: LBAC error: %s

  • Error code in OceanBase Database: 5700

  • SQLSTATE: HY000

  • Cause: Label-based access control (LBAC) is performed.

  • Solution: Correct the problem identified in the error message.

ORA-12444: policy already applied to table

  • Error code in OceanBase Database: 5790

  • SQLSTATE: HY000

  • Cause: You are applying a strategy to a table that is already under strategy protection.

  • Solution: If you need to modify the table options, predicate, or label function, you must first remove the strategy from the table and then reapply it.

ORA-12447: policy role already exists for policy string

  • Error code in OceanBase Database: 5701

  • SQLSTATE: HY000

  • Cause: A strategy with the specified name already exists.

  • Solution: Change the strategy name or delete the existing strategy.

ORA-12461: undefined level string for policy string

  • Error code in OceanBase Database: 5698

  • SQLSTATE: HY000

  • Cause: The specified level is not defined for the strategy.

  • Solution: Specify a level identifier value for the strategy.

ORA-12462: undefined compartment string for policy string

  • Error code in OceanBase Database: 5697

  • SQLSTATE: HY000

  • Cause: The specified component is not defined for the strategy.

  • Solution: Specify a component identifier value for the strategy.

ORA-12463: undefined group string for policy string

  • Error code in OceanBase Database: 5699

  • SQLSTATE: HY000

  • Cause: The specified group is not defined for the strategy.

  • Solution: Specify a group identifier value for the strategy.

ORA-12470: NULL or invalid user label: %s

  • Error code in OceanBase Database: 5702

  • SQLSTATE: HY000

  • Cause: The entered user label is NULL or is beyond the authorization for the user.

  • Solution: Enter an authorized label for the user.

ORA-12702: invalid NLS parameter string used in SQL function

  • Error code in OceanBase Database: 5604

  • SQLSTATE: HY000

  • Cause: An unknown argument name or an invalid value is specified in the NLS argument string.

ORA-12704: COLLATION '%.*s' is not valid for CHARACTER SET '%.*s'

  • Error code in OceanBase Database: 5144

  • SQLSTATE: 42000

  • Cause:

    • Different character sets are used for the string operands (excluding nlsparams) of the operator or built-in function.

    • The nlsparams operand is not contained in the character set of the database.

    • A character set other than the character set of the database is used for the string data passed to the built-in function, but the built-in function does not support the character set in use.

    • The second argument of CHR() or CSCONVERT() is not CHAR_CS or NCHAR_CS.

    • The character set of the string expression in the VALUES clause of the INSERT statement or the SET clause of the UPDATE statement is different from the character set used by the column to be inserted.

    • In the table creation statement, the character set used for the values in the DEFAULT clause is different from the character set declared for the column.

    • An argument of the PL function does not meet the character set requirements of the argument.

ORA-12704: character set mismatch

  • Error code in OceanBase Database: 5808

  • SQLSTATE: HY000

  • Cause:

    • Different character sets are used for the string operands (excluding nlsparams) of the operator or built-in function.

    • The nlsparams operand is not contained in the character set of the database.

    • A character set other than the character set of the database is used for the string data passed to the built-in function, but the built-in function does not support the character set in use.

    • The second argument of CHR() or CSCONVERT() is not CHAR_CS or NCHAR_CS.

    • The character set of the string expression in the VALUES clause of the INSERT statement or the SET clause of the UPDATE statement is different from the character set used by the column to be inserted.

    • In the table creation statement, the character set used for the values in the DEFAULT clause is different from the character set declared for the column.

    • An argument of the PL function does not meet the character set requirements of the argument.

ORA-12705: Cannot access NLS data files or invalid environment specified

  • Error code in OceanBase Database: 5943

  • SQLSTATE: HY000

  • Cause:

    • An invalid NLS parameter or value is specified in the ALTER SESSION statement.

    • The name of environment variable NLS_LANG, ORA_NLSxx, or ORACLE_HOME is incorrectly spelled, and therefore the NLS data file cannot be found.

  • Solution:

    • Check the syntax of the ALTER SESSION statement and the NLS parameter, correct the syntax errors, and try this statement again.

    • Ensure that the name of the environment variable is correctly spelled.

ORA-12725: unmatched parentheses in regular expression

  • Error code in OceanBase Database: 5813

  • SQLSTATE: HY000

  • Cause: Parentheses (()) in the regular expression do not appear in pairs.

  • Solution: Ensure that the parentheses are symmetric.

ORA-12726: unmatched bracket in regular expression

  • Error code in OceanBase Database: 5812

  • SQLSTATE: HY000

  • Cause: Square brackets ([]) in the regular expression do not appear in pairs.

  • Solution: Ensure that the parentheses are symmetric.

ORA-12727: invalid back reference in regular expression

  • Error code in OceanBase Database: 5814

  • SQLSTATE: HY000

  • Cause: The subexpression contains a back reference.

  • Solution: Make sure that the referenced subexpression is valid.

ORA-12728: invalid range in regular expression

  • Error code in OceanBase Database: 5815

  • SQLSTATE: HY000

  • Cause: An invalid range is found in the regular expression.

  • Solution: Ensure that a valid range is used.

ORA-12729: invalid character class in regular expression

  • Error code in OceanBase Database: 5816

  • SQLSTATE: HY000

  • Cause: An unknown character class is found in the regular expression.

  • Solution: Use a valid character class.

ORA-12731: invalid collation class in regular expression

  • Error code in OceanBase Database: 5817

  • SQLSTATE: HY000

  • Cause: An unknown collation class is found in the regular expression.

  • Solution: Use a valid collation class.

ORA-12801: error signaled in parallel query server

  • Error code in OceanBase Database: 5736

  • SQLSTATE: HY000

  • Cause: When Parallel eXecution (PX) needs to be terminated, this error code is broadcasted to all execution nodes to terminate the current execution.

  • Solution: Find the cause of interruption in the execution log or contact OceanBase Technical Support for troubleshooting.

ORA-12827: insufficient parallel query worker available

  • Error code in OceanBase Database: 5345

  • SQLSTATE: HY000

  • Cause: The parallel_servers_target parameter is specified, but the number of obtained slaves is less than the specified lower limit or reaches the upper limit.

  • Solution: Increase the value of parallel_servers_target and execute the query again, or wait for slaves to be released after some ongoing queries are completed.

ORA-12899: value too large for column '%.*s' at row %ld

  • Error code in OceanBase Database: 5167

  • SQLSTATE: 22001

  • Cause: The column value to be inserted or updated exceeds the width limit.

  • Solution: Check the correctness of the SQL statement. Check the data types of the source and destination columns. Increase the width of the destination column or use a subset, namely, a substring, of the source column.

ORA-12991: column is referenced in a multi-column constraint

  • Error code in OceanBase Database: 5792

  • SQLSTATE: HY000

  • Cause: You attempted to delete a column referenced by some constraints.

  • Solution: Delete all constraints that reference the column or specify CASCADE CONSTRAINTS in the statement.

ORA-12991: column \'%.*s\' is referenced in a multi-column constraint \'%.*s\'

  • Error code in OceanBase Database: 5859

  • SQLSTATE: HY000

  • Cause: You attempted to delete a column referenced by some constraints.

  • Solution: Delete all constraints that reference the column or specify CASCADE CONSTRAINTS in the statement.

ORA-12992: cannot drop parent key column

  • Error code in OceanBase Database: 5793

  • SQLSTATE: HY000

  • Cause: You attempted to drop a parent key column.

  • Solution: Delete all constraints that reference this parent key column, or specify CASCADE CONSTRAINTS in the statement.

ORA-13207: incorrect use of the ['%.*s'] operator

  • Error code in OceanBase Database: 5804

  • SQLSTATE: HY000

  • Cause: An error occurred while using the specified operator.

  • Solution: Check the parameters and return type of the operator.

ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE

  • Error code in OceanBase Database: 5275

  • SQLSTATE: HY000

  • Cause: The partition bound list contains elements of invalid types. To be specific, the elements are not digits, null strings, datetime, interval literals, or MAXVALUE.

  • Solution: Ensure that all elements in the partition bound list are of valid types.

ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE

  • Error code in OceanBase Database: 5285

  • SQLSTATE: HY000

  • Cause: The partition bound list contains elements of invalid types. To be specific, the elements are not digits, null strings, datetime, interval literals, or MAXVALUE.

  • Solution: Ensure that all elements in the partition bound list are of valid types.

ORA-14036: partition bound value too large for column

  • Error code in OceanBase Database: 5354

  • SQLSTATE: 22001

  • Cause: The length of a partition bound value exceeds that of the corresponding partitioning column.

  • Solution: Ensure that the upper bounds of partitions do not exceed the lengths of the corresponding partitioning columns.

ORA-14037: partition bound of partition '%.*s' is too high

  • Error code in OceanBase Database: 5281

  • SQLSTATE: HY000

  • Cause: The upper bound of a partition is greater than that of the next partition.

  • Solution: Ensure that the upper bound of each partition, except for the last partition, is less than that of the next partition.

ORA-14047: ALTER TABLE|INDEX RENAME may not be combined with other operations

  • Error code in OceanBase Database: 5863

  • SQLSTATE: HY000

  • Cause: The ALTER TABLE or ALTER INDEX statement attempted to combine the RENAME operation with other operations, which is not allowed.

  • Solution: Make sure that the ALTER TABLE or ALTER INDEX statement contains only the RENAME operation.

ORA-14060: data type or length of a table partitioning column may not be changed

  • Error code in OceanBase Database: 5895

  • SQLSTATE: HY000

  • Cause: The ALTER TABLE statement is used to modify the data type or length of a partitioning column in a table named by using the ALTER TABLE statement.

  • Solution: Do not modify the data type or length of partitioning columns in a table.

ORA-14074: partition bound must collate higher than that of the last partition

  • Error code in OceanBase Database: 5353

  • SQLSTATE: HY000

  • Cause: The partition bound specified in the ALTER TABLE ADD PARTITION statement is not higher than the bound of the last partition in the table.

  • Solution: Ensure that the bound of the partition to be added is higher than that of the last partition in the table.

ORA-14100: partition extended table name cannot refer to a remote object

  • Error code in OceanBase Database: 5899

  • SQLSTATE: HY000

  • Cause: You attempted to name a remote object by using partition-extended table syntax.

  • Solution: Correct the expression and retry.

ORA-14109: partition-extended object names may only be used with tables and editioning views

  • Error code in OceanBase Database: 5977

  • SQLSTATE: HY000

  • Cause: You attempted to use a partition-extended object name for an object which was not a table or an editioning view.

  • Solution: Do not use the partition-extended name syntax for objects other than tables or editioning views.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14159: duplicate subpartition name

  • Error code in OceanBase Database: 5867

  • SQLSTATE: HY000

  • Cause: The name of a subpartition of the table or index is not unique.

  • Solution: Rename the subpartition to make sure that its name is unique among subpartitions of the table or index.

ORA-14170: cannot specify <(sub)partition-description> clause in CREATE TABLE or CREATE INDEX

  • Error code in OceanBase Database: 5866

  • SQLSTATE: HY000

  • Cause: The request generates a default partition description (possibly through PARTITIONS number-of-partitions) and specifies the <(sub)partition-description> clause, which is not allowed.

  • Solution: Delete one of the clauses.

ORA-14214: VALUES (<value list>) cannot be used for Range subpartitioned tables

  • Error code in OceanBase Database: 5876

  • SQLSTATE: HY000

  • Cause: The VALUES (value list) clause is used for RANGE-subpartitioned tables.

  • Solution: Use the VALUES LESS THAN or AT clause for RANGE-subpartitioned tables.

ORA-14217: VALUES (<value list>) clause expected

  • Error code in OceanBase Database: 5877

  • SQLSTATE: HY000

  • Cause: The VALUES (value list) clause is not specified for a LIST-subpartitioned table.

  • Solution: Specify the VALUES (value list) clause.

ORA-14251: Specified subpartition does not exist

  • Error code in OceanBase Database: 5830

  • SQLSTATE: HY000

  • Cause: No subpartition is found for the object.

  • Solution: Use the valid subpartition name and try again.

ORA-14253: table is not partitioned by composite partition method

  • Error code in OceanBase Database: 5875

  • SQLSTATE: HY000

  • Cause: The possible causes are as follows:

    • The table in a subpartition maintenance operation, such as ALTER TABLE [EXCHANGE | MODIFY | MOVE | TRUNCATE] SUBPARTITION or ALTER TABLE MODIFY PARTITION [ADD | COALESCE] SUBPARTITION, is not partitioned by using the composite partitioning method.

    • The table in the MODIFY DEFAULT ATTRIBUTES FOR PARTITION operation is partitioned by using a method other than composite partitioning.

    • The table in the ALTER TABLE MODIFY SUBPARTITION [UNUSABLE LOCAL INDEXES | REBUILD UNUSABLE LOCAL INDEXES] statement is not partitioned by using the composite partitioning method.

  • Solution: Ensure that the table is partitioned by using the composite partitioning method.

ORA-14265: data type or length of a table subpartitioning column may not be changed

  • Error code in OceanBase Database: 5896

  • SQLSTATE: HY000

  • Cause: The ALTER TABLE statement is used to modify the data type or length of a column used to partition a table named by using the ALTER TABLE statement.

  • Solution: Do not modify the data type or length of table subpartitioning columns.

ORA-14300: partitioning key maps to a partition outside maximum permitted number of partitions

  • Error code in OceanBase Database: 6274

  • SQLSTATE: HY000

  • Cause: The inserted row had a partitioning key that maps to a partition number greater than 1,048,575.

  • Solution: Make sure that the partitioning key maps to no more than 1,048,575 partitions or subpartitions.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14308: partition bound element must be one of: string, datetime or interval literal, number, or NULL

  • Error code in OceanBase Database: 5355

  • SQLSTATE: HY000

  • Cause: The partition bound list contains elements of invalid types, which are not digits, null strings, datetime, interval literals, or NULL.

  • Solution: Ensure that all elements in the partition bound list are of valid types.

ORA-14310: VALUES LESS THAN or AT clause cannot be used with List partitioned tables

  • Error code in OceanBase Database: 5878

  • SQLSTATE: HY000

  • Cause: The VALUES LESS THAN or VALUES LESS AT clause can be used only for RANGE-partitioned tables.

  • Solution: Use the VALUES (value list) clause for LIST-partitioned tables.

ORA-14311: Expecting VALUES LESS THAN or AT clause

  • Error code in OceanBase Database: 5879

  • SQLSTATE: HY000

  • Cause: The VALUES (value list) clause can be used only for LIST-partitioned tables.

  • Solution: Use the VALUES LESS THAN clause for RANGE-partitioned tables.

ORA-14312: invalid time limit specified

  • Error code in OceanBase Database: 5882

  • SQLSTATE: HY000

  • Cause: A non-positive value is specified for the time parameter of the dbms_lock.sleep(time) package.

  • Solution: Specify a positive value.

ORA-14318: DEFAULT partition must be last partition specified

  • Error code in OceanBase Database: 5491
  • SQLSTATE: 42000
  • Cause: The DEFAULT partition must be the last specified partition.

Note

This error code is introduced since OceanBase Database V4.1.0.

ORA-14400: inserted partition key does not map to any partition

  • Error code in OceanBase Database: 5284

  • SQLSTATE: HY000

  • Cause:

    • You attempted to insert a record to a RANGE or COMPOSITE RANGE object, but the concatenated partitioning key included in the RANGE or COMPOSITE RANGE object is beyond the concatenated partition bound list of the last partition.

    • You attempted to insert a record to a LIST object, but the partitioning key included in this object does not match the specified literal value of any partition.

  • Solution: Do not insert this key, add a partition that accepts this key, or add a value matching this key to the partition configuration.

ORA-14402: updating partition key column would cause a partition change

  • Error code in OceanBase Database: 5350

  • SQLSTATE: HY000

  • Cause: The UPDATE operation caused a change of the partition to which the row belongs.

  • Solution: Enable the enable row movement attribute for the table.

ORA-14501: object is not partitioned

  • Error code in OceanBase Database: 5829

  • SQLSTATE: HY000

  • Cause: The table or index is not partitioned. The syntax is invalid.

  • Solution: Retry the command with the valid syntax.

ORA-14551: cannot perform a DML operation inside a query

  • Error code in OceanBase Database: 9709

  • SQLSTATE: HY000

  • Cause: A DML operation like INSERT, UPDATE, DELETE, or SELECT-for-UPDATE cannot be performed inside a query or under a PDML slave.

  • Solution: Make sure that the offending DML operation is not performed, or use an autonomous transaction to perform the DML operation within the query or PDML slave.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14552: cannot perform a DDL commit or rollback inside a query or DML tips

  • Error code in OceanBase Database: 9710

  • SQLSTATE: HY000

  • Cause: DDL operations (such as creating tables or views) and transaction control statements (such as commit and rollback) cannot be performed inside a query or a DML statement.

  • Solution: Make sure that the offending operation is not performed, or use autonomous transactions to perform the operation within the query or DML statement.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14750: Range partitioned table with INTERVAL clause has more than one column

  • Error code in OceanBase Database: 5997

  • SQLSTATE: HY000

  • Cause: You attempted to create an interval-partitioned table with more than one partitioning columns.

  • Solution: Use a single partitioning column.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14751: Invalid data type for partitioning column of an interval partitioned table

  • Error code in OceanBase Database: 5998

  • SQLSTATE: HY000

  • Cause: You attempted to use interval partitioning on a table partitioned on a column whose data type is not number or date/time.

  • Solution: Use only number or date/time columns as partitioning columns for interval-partitioned tables.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14752: Interval expression is not a constant of the correct type

  • Error code in OceanBase Database: 5999

  • SQLSTATE: HY000

  • Cause: You attempted to use either a nonconstant interval or an interval whose data type does not correspond to the partitioning column.

  • Solution: Use only constant expressions for the interval. If the data type of the partitioning column is numeric, the interval must be a numeric constant. If the data type is date/time, the interval must be a constant of the interval type.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14753: Interval cannot be zero

  • Error code in OceanBase Database: 6273

  • SQLSTATE: HY000

  • Cause: The interval mapped to zero.

  • Solution: Use a non-zero interval.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14757: Table is already a range partitioned table

  • Error code in OceanBase Database: 6000

  • SQLSTATE: HY000

  • Cause: SET INTERVAL() is used to convert an interval-partitioned table to a RANGE-partitioned table. You are not allowed to use SET INTERVAL() on a RANGE-partitioned table.

  • Solution: Use SET INTERVAL() only on an interval-partitioned table.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14758: Last partition in the range section cannot be dropped

  • Error code in OceanBase Database: 4730

  • SQLSTATE: HY000

  • Cause: You attempted to drop the last RANGE partition of an interval-partitioned table.

  • Solution: Do not drop the last RANGE partition of an interval-partitioned table.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14759: SET INTERVAL is not legal on this table

  • Error code in OceanBase Database: 4731

  • SQLSTATE: HY000

  • Cause: The SET INTERVAL clause was specified. ALTER TABLE SET INTERVAL is allowed only on a RANGE-partitioned table with a single partitioning column. Additionally, this table cannot have a MAXVALUE partition.

  • Solution: Use SET INTERVAL only on a valid table.

Note

This error code is introduced since OceanBase Database V4.0.0.

ORA-14760: ADD PARTITION is not permitted on Interval partitioned objects

  • Error code in OceanBase Database: 6269

  • SQLSTATE: HY000

  • Cause: You attempted to execute the ALTER TABLE ADD PARTITION statement on an interval-partitioned object to add a partition.

  • Solution: Do not perform the operation on an interval-partitioned object. To add a partition, insert a row into the object.

ORA-14761: MAXVALUE partition cannot be specified for Interval partitioned objects

  • Error code in OceanBase Database: 6270

  • SQLSTATE: HY000

  • Cause: You attempted to create a partition or subpartition with a MAXVALUE high bound on an interval-partitioned or interval-subpartitioned object.

  • Solution: Do not create a partition or subpartition with a MAXVALUE high bound.

ORA-14767: Cannot specify this interval with existing high bounds

  • Error code in OceanBase Database: 6271

  • SQLSTATE: HY000

  • Cause: The interval specified conflicts with the existing high bound for the last partition. The combination might lead to invalid dates for high bounds in the future

  • Solution: If you are executing CREATE TABLE, try to specify a different high bound value for the last partition or specify a different interval. If you are executing ALTER TABLE SET INTERVAL, choose either a different interval, or modify the table to change the high bound for the last partition.

ORA-16000: standby tenant is read only

  • Error code in OceanBase Database: 4688

  • SQLSTATE: HY000

  • Cause: The standby cluster supports only read operations. This error is returned when you execute write statements, such as DDL statements.

  • Solution: Switch the standby cluster to be the primary cluster.

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What is on this page
ORA-12401: invalid label string
ORA-12416: policy string not found
ORA-12432: LBAC error: %s
ORA-12444: policy already applied to table
ORA-12447: policy role already exists for policy string
ORA-12461: undefined level string for policy string
ORA-12462: undefined compartment string for policy string
ORA-12463: undefined group string for policy string
ORA-12470: NULL or invalid user label: %s
ORA-12702: invalid NLS parameter string used in SQL function
ORA-12704: COLLATION '%.*s' is not valid for CHARACTER SET '%.*s'
ORA-12704: character set mismatch
ORA-12705: Cannot access NLS data files or invalid environment specified
ORA-12725: unmatched parentheses in regular expression
ORA-12726: unmatched bracket in regular expression
ORA-12727: invalid back reference in regular expression
ORA-12728: invalid range in regular expression
ORA-12729: invalid character class in regular expression
ORA-12731: invalid collation class in regular expression
ORA-12801: error signaled in parallel query server
ORA-12827: insufficient parallel query worker available
ORA-12899: value too large for column '%.*s' at row %ld
ORA-12991: column is referenced in a multi-column constraint
ORA-12991: column \'%.*s\' is referenced in a multi-column constraint \'%.*s\'
ORA-12992: cannot drop parent key column
ORA-13207: incorrect use of the ['%.*s'] operator
ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
ORA-14019: partition bound element must be one of: string, datetime or interval literal, number, or MAXVALUE
ORA-14036: partition bound value too large for column
ORA-14037: partition bound of partition '%.*s' is too high
ORA-14047: ALTER TABLE|INDEX RENAME may not be combined with other operations
ORA-14060: data type or length of a table partitioning column may not be changed
ORA-14074: partition bound must collate higher than that of the last partition
ORA-14100: partition extended table name cannot refer to a remote object
ORA-14109: partition-extended object names may only be used with tables and editioning views
ORA-14159: duplicate subpartition name
ORA-14170: cannot specify <(sub)partition-description> clause in CREATE TABLE or CREATE INDEX
ORA-14214: VALUES (<value list>) cannot be used for Range subpartitioned tables
ORA-14217: VALUES (<value list>) clause expected
ORA-14251: Specified subpartition does not exist
ORA-14253: table is not partitioned by composite partition method
ORA-14265: data type or length of a table subpartitioning column may not be changed
ORA-14300: partitioning key maps to a partition outside maximum permitted number of partitions
ORA-14308: partition bound element must be one of: string, datetime or interval literal, number, or NULL
ORA-14310: VALUES LESS THAN or AT clause cannot be used with List partitioned tables
ORA-14311: Expecting VALUES LESS THAN or AT clause
ORA-14312: invalid time limit specified
ORA-14318: DEFAULT partition must be last partition specified
ORA-14400: inserted partition key does not map to any partition
ORA-14402: updating partition key column would cause a partition change
ORA-14501: object is not partitioned
ORA-14551: cannot perform a DML operation inside a query
ORA-14552: cannot perform a DDL commit or rollback inside a query or DML tips
ORA-14750: Range partitioned table with INTERVAL clause has more than one column
ORA-14751: Invalid data type for partitioning column of an interval partitioned table
ORA-14752: Interval expression is not a constant of the correct type
ORA-14753: Interval cannot be zero
ORA-14757: Table is already a range partitioned table
ORA-14758: Last partition in the range section cannot be dropped
ORA-14759: SET INTERVAL is not legal on this table
ORA-14760: ADD PARTITION is not permitted on Interval partitioned objects
ORA-14761: MAXVALUE partition cannot be specified for Interval partitioned objects
ORA-14767: Cannot specify this interval with existing high bounds
ORA-16000: standby tenant is read only