ResyncStats - Teradata Database - Teradata Vantage NewSQL Engine

Application Programming Reference

Product

Teradata Database

Teradata Vantage NewSQL Engine

Release Number

16.20

Published

March 2019

Language

English (United States)

Last Update

2019-05-02

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B035-1090

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Product Category

Teradata Vantage™

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 or an ARC restore operation.
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);