The RESTORE_SCHEMA_STATS procedure restores schema-level historical statistics of the specified point in time.
Syntax
DBMS_STATS.RESTORE_SCHEMA_STATS(
ownname VARCHAR2,
as_of_timestamp TIMESTAMP WITH TIME ZONE,
force BOOLEAN DEFAULT FALSE,
no_invalidate BOOLEAN DEFAULT FALSE);
Parameters
| Parameter | Description |
|---|---|
| ownname | The name of the schema. |
| 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 during statistics collection. If you set the value to TRUE, the plan cache will not be refreshed during statistics collection. |
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 of the specified point in time on the hr schema.
obclient [hr]> CALL DBMS_STATS.RESTORE_SCHEMA_STATS ('hr', '2021-09-26 19:02:12.675729');
Query OK, 0 rows affected
