Note
This view is available starting with V4.0.0.
Purpose
This view displays the subpartition information of the partitioned tables of the current tenant. The information includes the subpartition name, the table name, the partition name, the storage attributes, and the statistics generated by the DBMS_STATS package.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| TABLE_OWNER | varchar(128) | NO | The owner of the table. |
| TABLE_NAME | varchar(128) | NO | The name of the table. |
| PARTITION_NAME | varchar(128) | NO | The name of the partition. |
| SUBPARTITION_NAME | varchar(128) | NO | The name of the subpartition. |
| HIGH_VALUE | mediumtext | NO | The subpartition expression. |
| HIGH_VALUE_LENGTH | bigint(20) | NO | The length of the subpartition expression. |
| PARTITION_POSITION | bigint(20) | NO | The position of the partition. |
| SUBPARTITION_POSITION | bigint(20) | NO | The position of the subpartition in the partition. |
| TABLESPACE_NAME | varchar(30) | NO | The name of the tablespace that contains the subpartition. |
| PCT_FREE | bigint(0) | NO | This column is not supported. The default value is NULL. |
| PCT_USED | bigint(0) | NO | This column is not supported. The default value is NULL. |
| INI_TRANS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| MAX_TRANS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| INITIAL_EXTENT | bigint(0) | NO | This column is not supported. The default value is NULL. |
| NEXT_EXTENT | bigint(0) | NO | This column is not supported. The default value is NULL. |
| MIN_EXTENT | bigint(0) | NO | This column is not supported. The default value is NULL. |
| MAX_EXTENT | bigint(0) | NO | This column is not supported. The default value is NULL. |
| MAX_SIZE | bigint(0) | NO | This column is not supported. The default value is NULL. |
| PCT_INCREASE | bigint(0) | NO | This column is not supported. The default value is NULL. |
| FREELISTS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| FREELIST_GROUPS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| LOGGING | varchar(3) | NO | This column is not supported. The default value is NULL. |
| COMPRESSION | varchar(8) | NO | Indicates whether the subpartition is compressed. |
| COMPRESS_FOR | varchar(30) | NO | The compression method. |
| NUM_ROWS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| BLOCKS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| EMPTY_BLOCKS | bigint(0) | NO | This column is not supported. The default value is NULL. |
| AVG_SPACE | bigint(0) | NO | This column is not supported. The default value is NULL. |
| CHAIN_CNT | bigint(0) | NO | This column is not supported. The default value is NULL. |
| AVG_ROW_LEN | bigint(0) | NO | This column is not supported. The default value is NULL. |
| SAMPLE_SIZE | bigint(0) | NO | This column is not supported. The default value is NULL. |
| LAST_ANALYZED | date | NO | This column is not supported. The default value is NULL. |
| BUFFER_POOL | varchar(7) | NO | This column is not supported. The default value is NULL. |
| FLASH_CACHE | varchar(7) | NO | This column is not supported. The default value is NULL. |
| CELL_FLASH_CACHE | varchar(7) | NO | This column is not supported. The default value is NULL. |
| GLOBAL_STATS | varchar(3) | NO | This column is not supported. The default value is NULL. |
| USER_STATS | varchar(3) | NO | This column is not supported. The default value is NULL. |
| INTERVAL | varchar(3) | NO | This column is not supported. The default value is NO. |
| SEGMENT_CREATED | varchar(3) | NO | This column is not supported. The default value is NULL. |
| INDEXING | varchar(3) | NO | The default value is NULL. |
| READ_ONLY | varchar(3) | NO | Currently, this field is set to NULL by default. |
| INMEMORY | varchar(8) | NO | This field is NULL by default. |
| INMEMORY_PRIORITY | varchar(8) | NO | This column is NULL by default. |
| INMEMORY_DISTRIBUTE | varchar(15) | NO | This column is currently not supported. It defaults to NULL. |
| INMEMORY_COMPRESSION | varchar(17) | NO | NULL by default |
| INMEMORY_DUPLICATE | varchar(13) | NO | This column is set to NULL by default. |
| INMEMORY_SERVICE | varchar(12) | NO | The default value of this column is NULL. |
| INMEMORY_SERVICE_NAME | varchar(1000) | NO | Indicates that the default value of this column is NULL. |
| CELLMEMORY | varchar(24) | NO | This column is not currently supported and defaults to NULL. |
| MEMOPTIMIZE_READ | varchar(8) | NO | This column is set to NULL by default |
| MEMOPTIMIZE_WRITE | varchar(8) | NO | This field is by default set to NULL. |
Sample query
Query the t_m_rclc partitioned table of the current tenant in the sys tenant.
obclient [oceanbase]> SELECT TABLE_OWNER, TABLE_NAME, PARTITION_NAME, SUBPARTITION_NAME, HIGH_VALUE, HIGH_VALUE_LENGTH, PARTITION_POSITION, SUBPARTITION_POSITION FROM oceanbase.DBA_TAB_SUBPARTITIONS WHERE TABLE_NAME='t_m_rclc';
The query result is as follows:
+-------------+------------+----------------+-------------------+------------+-------------------+--------------------+-----------------------+
| TABLE_OWNER | TABLE_NAME | PARTITION_NAME | SUBPARTITION_NAME | HIGH_VALUE | HIGH_VALUE_LENGTH | PARTITION_POSITION | SUBPARTITION_POSITION |
+-------------+------------+----------------+-------------------+------------+-------------------+--------------------+-----------------------+
| test | t_m_rclc | p0 | p0smp0 | 1,3 | 3 | 1 | 1 |
| test | t_m_rclc | p0 | p0smp1 | 4,6 | 3 | 1 | 2 |
| test | t_m_rclc | p0 | p0smp2 | 7 | 1 | 1 | 3 |
| test | t_m_rclc | p1 | p1smp0 | 1,3 | 3 | 2 | 1 |
| test | t_m_rclc | p1 | p1smp1 | 4,6 | 3 | 2 | 2 |
| test | t_m_rclc | p1 | p1smp2 | 7 | 1 | 2 | 3 |
| test | t_m_rclc | p2 | p2smp0 | 1,3 | 3 | 3 | 1 |
| test | t_m_rclc | p2 | p2smp1 | 4,6 | 3 | 3 | 2 |
| test | t_m_rclc | p2 | p2smp2 | 7 | 1 | 3 | 3 |
+-------------+------------+----------------+-------------------+------------+-------------------+--------------------+-----------------------+
9 rows in set
References
Query the subpartition information of all tenants' partitioned tables: CDB_TAB_SUBPARTITIONS
Query the partition information of the partitioned tables of the current tenant: DBA_TAB_PARTITIONS