The RESTORE_TABLE_STATS procedure restores table-level historical statistics as of a specified timestamp.
Applicability
This topic applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition provides only the MySQL mode.
Syntax
DBMS_STATS.RESTORE_TABLE_STATS (
ownname VARCHAR2,
tabname VARCHAR2,
as_of_timestamp TIMESTAMP WITH TIME ZONE,
force BOOLEAN DEFAULT FALSE,
no_invalidate BOOLEAN DEFAULT FALSE);
Parameters
| Parameter | Description |
|---|---|
| ownname | The username. If the username is set to NULL, the current logon username is used by default. |
| tabname | The name of the table. |
| as_of_timestamp | The timestamp to which statistics are restored. |
| force | Specifies whether to restore statistics by force and ignore the lock. Default value: FALSE. |
| no_invalidate | Specifies whether to refresh the plan cache when statistics are collected. If you set the value to TRUE, the plan cache is not refreshed when statistics are collected. |
Exceptions
| Error code | Description |
|---|---|
| ORA-20000 | The object does not exist, or you do not have the required privileges. |
| ORA-20001 | Values are invalid or inconsistent. |
| ORA-20006 | The historical statistics are unavailable and cannot be restored. |
Considerations
To call this procedure, you must be the owner of the table. If the object is in the sys tenant, you must be the owner of the table or have the SYSDBA privilege.
Examples
Restore the statistics on the tbl1 table of the testUser01 user to a specified timestamp.
obclient> CALL DBMS_STATS.RESTORE_TABLE_STATS ('testUser01', 'tbl1',TO_TIMESTAMP('2022-12-06 22:00:01.007146', 'YYYY-MM-DD HH24:MI:SS.FF'));
Query OK, 0 rows affected
