Feature
USER_TAB_SUBPARTITIONS describes, for each table subpartition owned by the current user, the subpartition name, the names of the table and partition to which it belongs, and its storage attributes.
Applicability
This topic applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition provides only MySQL mode.
Related views
ALL_TAB_SUBPARTITIONS
DBA_TAB_SUBPARTITIONS
Fields
| Field | Type | Nullable | Description |
|---|---|---|---|
| TABLE_NAME | VARCHAR2(128) | NO | The name of the table. |
| PARTITION_NAME | VARCHAR2(128) | NO | The name of the partition. |
| SUBPARTITION_NAME | VARCHAR2(128) | NO | The name of the subpartition. |
| HIGH_VALUE | VARCHAR2(32767) | NO | The subpartition expression. |
| HIGH_VALUE_LENGTH | NUMBER | NO | The length of the subpartition expression. |
| PARTITION_POSITION | NUMBER | NO | The position of the partition. |
| SUBPARTITION_POSITION | NUMBER | NO | The position of the subpartition within the partition. |
| TABLESPACE_NAME | VARCHAR2(30) | NO | The name of the tablespace containing the subpartition. |
| PCT_FREE | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| PCT_USED | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| INI_TRANS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| MAX_TRANS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| INITIAL_EXTENT | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| NEXT_EXTENT | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| MIN_EXTENT | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| MAX_EXTENT | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| MAX_SIZE | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| PCT_INCREASE | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| FREELISTS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| FREELIST_GROUPS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| LOGGING | VARCHAR2(3) | NO | At present, this field is not supported and is NULL by default. |
| COMPRESSION | VARCHAR2(8) | NO | Indicates whether compression is enabled for the subpartition. |
| COMPRESS_FOR | VARCHAR2(30) | YES | The compression method. |
| NUM_ROWS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| BLOCKS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| EMPTY_BLOCKS | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| AVG_SPACE | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| CHAIN_CNT | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| AVG_ROW_LEN | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| SAMPLE_SIZE | NUMBER | NO | At present, this field is not supported and is NULL by default. |
| LAST_ANALYZED | DATE | NO | At present, this field is not supported and is NULL by default. |
| BUFFER_POOL | VARCHAR2(7) | NO | At present, this field is not supported and is NULL by default. |
| FLASH_CACHE | VARCHAR2(7) | NO | At present, this field is not supported and is NULL by default. |
| CELL_FLASH_CACHE | VARCHAR2(7) | NO | At present, this field is not supported and is NULL by default. |
| GLOBAL_STATS | VARCHAR2(3) | NO | At present, this field is not supported and is NULL by default. |
| USER_STATS | VARCHAR2(3) | NO | At present, this field is not supported and is NULL by default. |
| INTERVAL | VARCHAR2(3) | NO | At present, this field is not supported and is NULL by default. |
| SEGMENT_CREATED | VARCHAR2(3) | NO | At present, this field is not supported and is NULL by default. |
| INDEXING | VARCHAR2(3) | NO | The index attribute. Valid values: |
| READ_ONLY | VARCHAR2(3) | NO | Indicates whether the subpartition is read-only. Valid values: |
| INMEMORY | VARCHAR2(8) | NO | Indicates whether in-memory column store is enabled for the subpartition. Valid values: |
| INMEMORY_PRIORITY | VARCHAR2(8) | NO | The padding priority of the in-memory column store. Valid values: |
| INMEMORY_DISTRIBUTE | VARCHAR2(15) | NO | At present, this field is not supported and is NULL by default. |
| INMEMORY_COMPRESSION | VARCHAR2(17) | NO | The compression level for in-memory column store. Valid values: |
| INMEMORY_DUPLICATE | VARCHAR2(13) | NO | At present, this field is not supported and is NULL by default. |
| INMEMORY_SERVICE | VARCHAR2(12) | NO | The way that in-memory column store is padded on various instances. Valid values: |
| INMEMORY_SERVICE_NAME | VARCHAR2(1000) | 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. It is empty in other cases. |
| CELLMEMORY | VARCHAR2(24) | NO | At present, this field is not supported and is NULL by default. |
| MEMOPTIMIZE_READ | VARCHAR2(8) | NO | Indicates whether shortcut-based access is enabled for the table. Valid values: |
| MEMOPTIMIZE_WRITE | VARCHAR2(8) | NO | For internal use only. |