Exclude Objects from Map Reassignments | Teradata Vantage - 17.00 - 17.05 - About Excluding Objects from Map Reassignments - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Administration

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Published
June 2020
Language
English (United States)
Last Update
2021-01-22
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To exclude tables, join indexes, or hash indexes from the list to analyze and reassign to different maps, use procedures to create an empty list of exclusions and then add objects to it. In the following example, a DBA creates an exclusion list named 'MyExclusions' consisting of all tables in database 'Payroll', an individual table 'Employee.Withholding', and all tables in database 'Taxes' whose names begin with 'Rate'.
CALL TDMaps.CreateExclusionListSP('MyExclusions', NULL, :ExclusionListId);
CALL TDMaps.AddExclusionListEntrySP('MyExclusions', 'Payroll', NULL,:NumObjectsAdded);
CALL TDMaps.AddExclusionListEntrySP('MyExclusions', 'Employee', 'Withholding',:NumObjectsAdded);
CALL TDMaps.AddExclusionListEntrySP('MyExclusions', 'Taxes', 'Rate%', :NumObjectsAdded);

The result is that these tables are marked as exclude in the ActionsTbl and will not be considered for redistribution to other AMPs. The list of excluded objects is visible in the view TDMaps.ExclusionLists[V][X].

For more information on these procedures, including the syntax, see Teradata Vantage™ - SQL Operators and User-Defined Functions, B035-1210.