Note
This view is available starting with V4.0.0.
Overview
Displays the subpartition information for a partitioned table of the current tenant, including the subpartition name, the name of the table and its partition, their storage attributes, and statistics generated by the DBMS_STATS package.
Columns
Field Name |
Type |
Whether can be NULL |
Description |
|---|---|---|---|
| TABLE_OWNER | varchar(128) | NO | Owner of the table |
| TABLE_NAME | varchar(128) | NO | Table name |
| PARTITION_NAME | varchar(128) | NO | Partition Name |
| SUBPARTITION_NAME | varchar(128) | NO | Subpartition Name |
| HIGH_VALUE | mediumtext | NO | Subpartition expression |
| HIGH_VALUE_LENGTH | bigint(20) | NO | Length of Subpartition Expression |
| PARTITION_POSITION | bigint(20) | NO | Partition Location |
| SUBPARTITION_POSITION | bigint(20) | NO | The position of the subpartition within the partition. |
| TABLESPACE_NAME | varchar(30) | NO | Name of the tablespace containing the subpartition |
| PCT_FREE | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| PCT_USED | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| INI_TRANS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| MAX_TRANS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| INITIAL_EXTENT | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| NEXT_EXTENT | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| MIN_EXTENT | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| MAX_EXTENT | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| MAX_SIZE | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| PCT_INCREASE | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| FREELISTS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| FREELIST_GROUPS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| LOGGING | varchar(3) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| COMPRESSION | varchar(8) | NO | Whether Subpartition is Compressed |
| COMPRESS_FOR | varchar(30) | NO | Compression Method |
| NUM_ROWS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| BLOCKS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| EMPTY_BLOCKS | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| AVG_SPACE | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| CHAIN_CNT | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| AVG_ROW_LEN | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| SAMPLE_SIZE | bigint(0) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| LAST_ANALYZED | date | NO | This field is not supported. Currently, the default value of this field is NULL. |
| BUFFER_POOL | varchar(7) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| FLASH_CACHE | varchar(7) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| CELL_FLASH_CACHE | varchar(7) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| GLOBAL_STATS | varchar(3) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| USER_STATS | varchar(3) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| INTERVAL | varchar(3) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| SEGMENT_CREATED | varchar(3) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| INDEXING | varchar(3) | NO | The default value of this field is currently NULL. |
| READ_ONLY | varchar(3) | NO | The default value of this field is currently NULL. |
| INMEMORY | varchar(8) | NO | The default value of this field is currently NULL. |
| INMEMORY_PRIORITY | varchar(8) | NO | The default value of this field is currently NULL. |
| INMEMORY_DISTRIBUTE | varchar(15) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| INMEMORY_COMPRESSION | varchar(17) | NO | The default value of this field is currently NULL. |
| INMEMORY_DUPLICATE | varchar(13) | NO | The default value of this field is currently NULL. |
| INMEMORY_SERVICE | varchar(12) | NO | The default value of this field is currently NULL. |
| INMEMORY_SERVICE_NAME | varchar(1000) | NO | The default value of this field is currently NULL. |
| CELLMEMORY | varchar(24) | NO | This field is not supported. Currently, the default value of this field is NULL. |
| MEMOPTIMIZE_READ | varchar(8) | NO | The default value of this field is currently NULL. |
| MEMOPTIMIZE_WRITE | varchar(8) | NO | The default value of this field is currently NULL. |
Sample query
The system tenant queries the subpartition information of its own partitioned table t_m_rclc.
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
View the subpartition information of partitioned tables for all tenants: CDB_TAB_SUBPARTITIONS
View detailed information about partitions of a partitioned table in the current tenant: DBA_TAB_PARTITIONS