Note
This view is available starting with V4.0.0.
Purpose
This view displays the optimizer statistics of all indexes in the current tenant.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| OWNER | varchar(128) | NO | The owner of the index. |
| INDEX_NAME | varchar(128) | NO | The name of the index. |
| TABLE_OWNER | varchar(128) | NO | The owner of the index object. |
| TABLE_NAME | varchar(128) | NO | The name of the index object. |
| PARTITION_NAME | varchar(128) | NO | The name of the partition. |
| PARTITION_POSITION | decimal(10,0) | NO | The position of the partition in the index. |
| SUBPARTITION_NAME | varchar(128) | NO | The name of the subpartition. |
| SUBPARTITION_POSITION | decimal(10,0) | NO | The position of the subpartition in the partition. |
| OBJECT_TYPE | varchar(12) | NO | The object type. Valid values:
|
| BLEVEL | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| LEAF_BLOCKS | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| DISTINCT_KEYS | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| AVG_LEAF_BLOCKS_PER_KEY | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| AVG_DATA_BLOCKS_PER_KEY | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| CLUSTERING_FACTOR | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| NUM_ROWS | decimal(10,0) | NO | The number of rows in the index. |
| AVG_CACHED_BLOCKS | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| AVG_CACHE_HIT_RATIO | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| SAMPLE_SIZE | decimal(10,0) | NO | This column is reserved and will be NULL by default. |
| LAST_ANALYZED | datetime(6) | NO | The date when the index was last analyzed. |
| GLOBAL_STATS | varchar(3) | NO | Indicates whether statistics are collected or incrementally maintained. Valid values:
|
| USER_STATS | varchar(3) | NO | Indicates whether statistics are directly input by users. Valid values:
|
| STATTYPE_LOCKED | varchar(5) | NO | The type of the statistics lock. |
| STALE_STATS | varchar(3) | NO | Indicates whether the statistics of the object are outdated. |
| SCOPE | varchar(7) | NO | This column is reserved and will be NULL by default. |
Sample query
Query the optimizer statistics of the tbl2_f_rl_idx1 index in the sys tenant.
obclient [oceanbase]> SELECT * FROM oceanbase.DBA_IND_STATISTICS WHERE INDEX_NAME='tbl2_f_rl_idx1'\G
The query result is as follows:
*************************** 1. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p1
PARTITION_POSITION: 2
SUBPARTITION_NAME: sp5
SUBPARTITION_POSITION: 3
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 2. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p1
PARTITION_POSITION: 2
SUBPARTITION_NAME: sp4
SUBPARTITION_POSITION: 2
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 3. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p1
PARTITION_POSITION: 2
SUBPARTITION_NAME: sp3
SUBPARTITION_POSITION: 1
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 4. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p0
PARTITION_POSITION: 1
SUBPARTITION_NAME: sp2
SUBPARTITION_POSITION: 3
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 5. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p0
PARTITION_POSITION: 1
SUBPARTITION_NAME: sp1
SUBPARTITION_POSITION: 2
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 6. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p0
PARTITION_POSITION: 1
SUBPARTITION_NAME: sp0
SUBPARTITION_POSITION: 1
OBJECT_TYPE: SUBPARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: NULL
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: NULL
GLOBAL_STATS: NULL
USER_STATS: NULL
STATTYPE_LOCKED: NULL
STALE_STATS: NULL
SCOPE: NULL
*************************** 7. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p1
PARTITION_POSITION: 2
SUBPARTITION_NAME: NULL
SUBPARTITION_POSITION: NULL
OBJECT_TYPE: PARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: 0
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: 2025-03-14 10:48:23.542494
GLOBAL_STATS: NO
USER_STATS: NO
STATTYPE_LOCKED: NULL
STALE_STATS: NO
SCOPE: NULL
*************************** 8. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: p0
PARTITION_POSITION: 1
SUBPARTITION_NAME: NULL
SUBPARTITION_POSITION: NULL
OBJECT_TYPE: PARTITION
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: 0
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: 2025-03-14 10:48:23.542494
GLOBAL_STATS: NO
USER_STATS: NO
STATTYPE_LOCKED: NULL
STALE_STATS: NO
SCOPE: NULL
*************************** 9. row ***************************
OWNER: test
INDEX_NAME: tbl2_f_rl_idx1
TABLE_OWNER: test
TABLE_NAME: tbl2_f_rl
PARTITION_NAME: NULL
PARTITION_POSITION: NULL
SUBPARTITION_NAME: NULL
SUBPARTITION_POSITION: NULL
OBJECT_TYPE: INDEX
BLEVEL: NULL
LEAF_BLOCKS: NULL
DISTINCT_KEYS: NULL
AVG_LEAF_BLOCKS_PER_KEY: NULL
AVG_DATA_BLOCKS_PER_KEY: NULL
CLUSTERING_FACTOR: NULL
NUM_ROWS: 0
AVG_CACHED_BLOCKS: NULL
AVG_CACHE_HIT_RATIO: NULL
SAMPLE_SIZE: NULL
LAST_ANALYZED: 2025-03-14 10:48:23.542494
GLOBAL_STATS: NO
USER_STATS: NO
STATTYPE_LOCKED: NULL
STALE_STATS: NO
SCOPE: NULL
9 rows in set
References
View column statistics at the table level: DBA_TAB_STATISTICS
View column statistics at the global level: DBA_TAB_COL_STATISTICS
View column statistics at the partition level: DBA_PART_COL_STATISTICS
View column statistics at the subpartition level: DBA_SUBPART_COL_STATISTICS
View histogram statistics at the table level: DBA_TAB_HISTOGRAMS
View histogram statistics at the partition level: DBA_PART_HISTOGRAMS
View histogram statistics at the subpartition level: DBA_SUBPART_HISTOGRAMS
For information about how to collect statistics, see the following topics: