Removes statistics definitions stored in the TDSTATS database that no longer exist in the dictionary as a result of a SQL DROP statement. In the case of objects marked for preservation after dropping and recreating, the statistics definitions are repaired rather than removed; see related API PreserveAfterRecreate.
Definition
REPLACE PROCEDURE TDSTATS.ResyncStats( IN DatabaseName VARCHAR(128) CHARACTER SET UNICODE, IN TableName VARCHAR(128) CHARACTER SET UNICODE, OUT AutomateId BIGINT, OUT NumRemoved INTEGER) . . . . ;
Input Parameters
| Parameter | Description |
|---|---|
| DatabaseName | Name of the database. DatabaseName limits the operation to statistics defined in the database you specify. |
| TableName | Name of the table. TableName limits the operation to the table you specify. |
Usage Notes
By default, the ResyncStats external stored procedure operates on all statistic definitions defined in the TDSTATS database.
Teradata recommends running ResyncStats when the following occurs:
- Statistics definitions are automated and dropped as a result of a SQL DROP STATISTICS statement.
- The RunCollectReport external stored procedure reports errors from collections issued on statistics that no longer exist in the dictionary
Synchronizing the TDSTATS Database
To synchronize the TDSTATS database, you can call one of the following external stored procedures:
- ResyncStats with DatabaseName and TableName specified as NULL.
- AutomateStats with DeleteOrphans specified as Y.
To copy additional statistics definitions from DBC to the TDSTATS database, use the AutomateStats external stored procedure. For details, see AutomateStats.
Output Parameters
| Parameter | Description |
|---|---|
| AutomateId | ID for the history results from this operation. |
| NumRemoved | Number of statistics removed from the TDSTATS database and the number of rows repaired. |
Example: Using ResyncStats
The following example shows how to synchronize the statistics for the Personnel.Employee table.
CALL TDSTATS.ResyncStats('Personnel','Employee',AutomateId, NumRemovedOrRepaired);
Related Topics
| For more information on the ... | See ... |
|---|---|
| SQL DROP STATISTICS statement | Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144. |
| RunCollectReport external stored procedure | RunCollectReport. |
| DeleteOrphans input parameter or copying statistics | AutomateStats. |