Note
This view is available starting with V4.3.0.
Purpose
The DBA_MVREF_RUN_STATS view displays information about each refresh run of a materialized view. Each run is identified by a REFRESH_ID. The information includes timing statistics related to the run and the parameters specified for the run.
Columns
| Column | Type | Nullable? | Description |
|---|---|---|---|
| RUN_OWNER | varchar(128) | NO | The owner of the refresh operation (the user who initiated the operation). |
| REFRESH_ID | bigint(20) | NO | The ID of the refresh operation. |
| NUM_MVS | bigint(20) | NO | The number of materialized views refreshed. |
| MVIEWS | text | NO | The name of the materialized view specified in the API. |
| BASE_TABLES | text | YES | Reserved for internal use. |
| METHOD | text | YES | The METHOD parameter specified in the API. |
| ROLLBACK_SEG | text | YES | The ROLLBACK_SEG parameter specified in the API. |
| PUSH_DEFERRED_RPC | varchar(1) | NO | The PUSH_DEFERRED_RPC parameter specified in the API. |
| REFRESH_AFTER_ERRORS | varchar(1) | NO | The REFRESH_AFTER_ERRORS parameter specified in the API. |
| PURGE_OPTION | bigint(20) | NO | The PURGE_OPTION parameter specified in the API. |
| PARALLELISM | bigint(20) | NO | The PARALLELISM parameter specified in the API. |
| HEAP_SIZE | bigint(20) | NO | The HEAP_SIZE parameter specified in the API. |
| ATOMIC_REFRESH | varchar(1) | NO | The ATOMIC_REFRESH parameter specified in the API. |
| NESTED | varchar(1) | NO | The NESTED parameter specified in the API. |
| OUT_OF_PLACE | varchar(1) | NO | The OUT_OF_PLACE parameter specified in the API. |
| NUMBER_OF_FAILURES | bigint(20) | NO | The number of failures that occurred during API processing. |
| START_TIME | datetime | NO | The start time of the refresh run. |
| END_TIME | datetime | NO | The end time of the refresh run. |
| ELAPSED_TIME | bigint(20) | NO | The duration of the refresh run, in seconds. |
| LOG_SETUP_TIME | bigint(1) | NO | The time taken to set up the materialized view log, in seconds.
NoteThis field is reserved and its value is 0 by default. |
| LOG_PURGE_TIME | bigint(20) | NO | The time taken to purge the materialized view log, in seconds. |
| COMPLETE_STATS_AVAILABLE | varchar(1) | NO | Indicates whether complete refresh statistics are available for this run
NoteThis field is reserved and its value is Y by default. |
Sample query
Query information about each refresh run of a materialized view. Each run is identified by a REFRESH_ID.
obclient [test_db]> SELECT * FROM oceanbase.DBA_MVREF_RUN_STATS;
The query result is as follows:
+-----------+------------+---------+-----------------------+-------------+--------+--------------+-------------------+----------------------+--------------+-------------+-----------+----------------+--------+--------------+--------------------+---------------------+---------------------+--------------+----------------+----------------+--------------------------+
| RUN_OWNER | REFRESH_ID | NUM_MVS | MVIEWS | BASE_TABLES | METHOD | ROLLBACK_SEG | PUSH_DEFERRED_RPC | REFRESH_AFTER_ERRORS | PURGE_OPTION | PARALLELISM | HEAP_SIZE | ATOMIC_REFRESH | NESTED | OUT_OF_PLACE | NUMBER_OF_FAILURES | START_TIME | END_TIME | ELAPSED_TIME | LOG_SETUP_TIME | LOG_PURGE_TIME | COMPLETE_STATS_AVAILABLE |
+-----------+------------+---------+-----------------------+-------------+--------+--------------+-------------------+----------------------+--------------+-------------+-----------+----------------+--------+--------------+--------------------+---------------------+---------------------+--------------+----------------+----------------+--------------------------+
| root | 64670 | 1 | test_db.mv1_tbl1_tbl2 | NULL | NULL | NULL | N | N | 0 | 0 | 0 | N | N | N | 0 | 2024-01-17 16:26:28 | 2024-01-17 16:26:28 | 0 | 0 | 0 | Y |
| root | 64672 | 1 | test_db.mv2_tbl1_tbl2 | NULL | NULL | NULL | N | N | 0 | 0 | 0 | N | N | N | 0 | 2024-01-17 16:26:28 | 2024-01-17 16:26:28 | 0 | 0 | 0 | Y |
+-----------+------------+---------+-----------------------+-------------+--------+--------------+-------------------+----------------------+--------------+-------------+-----------+----------------+--------+--------------+--------------------+---------------------+---------------------+--------------+----------------+----------------+--------------------------+
2 rows in set (0.015 sec)