Purpose
The oceanbase.CDB_TAB_PARTITIONS view displays the partitioning information about the partitioned tables of all tenants.
Note
This view is introduced since OceanBase Database V4.0.0.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| CON_ID | bigint(20) | NO | The ID of the tenant. |
| TABLE_OWNER | varchar(128) | NO | The owner of the partitioned table. |
| TABLE_NAME | varchar(128) | NO | The name of the partitioned table. |
| COMPOSITE | varchar(3) | NO | Indicates whether the table is composite-partitioned. |
| PARTITION_NAME | varchar(128) | NO | The name of the partition. |
| SUBPARTITION_COUNT | bigint(20) | NO | The number of subpartitions. |
| HIGH_VALUE | varchar(262144) | NO | The length of the subpartition expression. |
| HIGH_VALUE_LENGTH | bigint(20) | NO | The position of the subpartition in the partition. |
| PARTITION_POSITION | bigint(20) | NO | The position of the partition. |
| TABLESPACE_NAME | varchar(30) | NO | The name of the tablespace containing the partition. |
| PCT_FREE | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| PCT_USED | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| INI_TRANS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| MAX_TRANS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| INITIAL_EXTENT | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| NEXT_EXTENT | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| MIN_EXTENT | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| MAX_EXTENT | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| MAX_SIZE | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| PCT_INCREASE | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| FREELISTS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| FREELIST_GROUPS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| LOGGING | varchar(7) | NO | At present, this column is not supported and is NULL by default. |
| COMPRESSION | varchar(8) | NO | Indicates whether compression is enabled. |
| COMPRESS_FOR | varchar(30) | NO | The compression method. |
| NUM_ROWS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| BLOCKS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| EMPTY_BLOCKS | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| AVG_SPACE | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| CHAIN_CNT | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| AVG_ROW_LEN | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| SAMPLE_SIZE | bigint(0) | NO | At present, this column is not supported and is NULL by default. |
| LAST_ANALYZED | date | NO | At present, this column is not supported and is NULL by default. |
| BUFFER_POOL | varchar(7) | NO | At present, this column is not supported and is NULL by default. |
| FLASH_CACHE | varchar(7) | NO | At present, this column is not supported and is NULL by default. |
| CELL_FLASH_CACHE | varchar(7) | NO | At present, this column is not supported and is NULL by default. |
| GLOBAL_STATS | varchar(3) | NO | At present, this column is not supported and is NULL by default. |
| USER_STATS | varchar(3) | NO | At present, this column is not supported and is NULL by default. |
| IS_NESTED | varchar(3) | NO | At present, this column is not supported and is NULL by default. |
| PARENT_TABLE_PARTITION | varchar(128) | NO | At present, this column is not supported and is NULL by default. |
| INTERVAL | varchar(3) | NO | At present, this column is not supported and is NULL by default. |
| SEGMENT_CREATED | varchar(4) | NO | At present, this column is not supported and is NULL by default. |
| INDEXING | varchar(4) | NO | The index attribute. Valid values:ON: The index of the subpartition is enabled.OFF: The index of the subpartition is disabled. |
| READ_ONLY | varchar(4) | NO | Indicates whether the subpartition is read-only. Valid values:YES: The subpartition is read-only.NO: The subpartition can be read and written. |
| INMEMORY | varchar(8) | NO | Indicates whether in-memory column store is enabled for the subpartition. Valid values:ENABLED: In-memory column store is enabled.DISABLED: In-memory column store is disabled. |
| INMEMORY_PRIORITY | varchar(8) | NO | The padding priority of the in-memory column store. Valid values: |
| INMEMORY_DISTRIBUTE | varchar(15) | NO | At present, this column is not supported and is NULL by default. |
| INMEMORY_COMPRESSION | varchar(17) | NO | The compression level for in-memory column store. Valid values: This value is based on the location of the middle section of the table. For example, if the table is partitioned and in-memory column store is enabled, the value for ALL_TABLES is NULL and the value for ALL_TAB_SUBPARTITIONS is not NULL. |
| INMEMORY_DUPLICATE | varchar(13) | NO | At present, this column is not supported and is NULL by default. |
| CELLMEMORY | varchar(24) | NO | At present, this column is not supported and is NULL by default. |
| INMEMORY_SERVICE | varchar(12) | NO | The way that in-memory column store is padded on various instances. Valid values:DEFAULTPARALLEL_INSTANCE_GROUP: Data is padded on all instances specified by the initialization parameter. This is the default value. If this parameter is not set, data is padded for all instances.NONE: Data is not padded for any instance.ALL: Data is padded for all instances regardless of the settings of the initialization parameter PARALLEL_INSTANCE_GROUP.USER_DEFINED: Data is padded only for instances where the user-defined service is active. The service name is saved in the INMEMORY_SERVICE_NAME column. |
| INMEMORY_SERVICE_NAME | varchar(100) | NO | The name of the service on which in-memory column store is padded. This column has values only when INMEMORY_SERVICE is set to USER_DEFINED, and is empty in other cases. |
| MEMOPTIMIZE_READ | varchar(8) | NO | Indicates whether shortcut-based access is enabled for the table. Valid values: |
| MEMOPTIMIZE_WRITE | varchar(8) | NO | For internal use only. |
