Marks an automated statistic inactive because of no observed query usage and disables it from future collections by the PrepCollect and RunCollect external stored procedures.
Syntax
REPLACE PROCEDURE TDSTATS.InActivateStat ( IN SCOID BIGINT, IN DatabaseName VARCHAR(128) CHARACTER SET UNICODE, IN TableName VARCHAR(128) CHARACTER SET UNICODE, IN ObjectListName VARCHAR(128) CHARACTER SET UNICODE, OUT NumInActivated INTEGER ) ... ;
Syntax Elements
- SCOID
- TDSTATS ID for an individual statistic.
- DatabaseName
- Name of the database. DatabaseName approves all statistics defined on the database you specify.
- TableName
- Name of the table within the specified DatabaseName. TableName limits the approval to the statistics defined on the table you specify within DatabaseName.
- ObjectListName
- Name of the object list. ObjectListName allows you to specify a previously defined list of objects (that is, one or more database names or fully qualified table names where each name entry may optionally contain wildcard characters) whose statistics should be approved.
- NumInActivated
- Number of statistics marked inactive that were previously active.
Usage Notes
Depending on how the CleanupStats external stored procedure is called, any identified inactive statistics may remain active until the InActivateStat external stored procedure is called on them. For more information about this external stored procedure, see CleanupStatsReport.
Inactivating Statistics
| To inactivate ... | You must specify a value for ... |
|---|---|
| a single statistic | SCOID. When specifying a value for SCOID, you do not need to specify a value for the DatabaseName or TableName.
|
| all statistics for a particular database | DatabaseName. |
| all statistics for a particular table | both DatabaseName and TableName. |
| a list of objects that cannot be specified by DatabaseName or TableName | ObjectListName that was previously created by the CreateObjectList and AddObjectListEntry external stored procedures. ObjectListName usage is mutually exclusive with DatabaseName and TableName . When you specify a value other than NULL for ObjectListName , DatabaseName and TableName must be NULL. |
Example: Using InActivateStat
The following example shows how to inactivate an automated statistic on the Personnel.Employee table whose TDSTATS database ID is 101.
CALL TDSTATS.InActivateStat(101,'Personnel','Employee', NULL, NumInActivated);
Result:
*** Procedure has been executed.
*** Total elapsed time was 1 second.
NumInActivated
--------------
1