ALTER TABLE Statement (Map and Colocation Form) | Teradata Vantage - ALTER TABLE (Map and Colocation Form) - Advanced SQL Engine - Teradata Database

Moves a table from one map to another. You can also change the colocation name for a sparse map.

Tables that have the same sparse map and colocation name can be joined using the same primary index or primary AMP index columns without redistributing or duplicating rows. For example, you can colocate two tables, then join the tables on the primary index or primary AMP index columns.

You can also use SQL procedures provided in the TDMaps system database to move tables from one map to another. See "Using Maps to Position Table Data across AMPs," in Teradata Vantage™ - Database Administration, B035-1093.

Required Privileges

See the CREATE USER DEFAULT MAP option, CREATE DATABASE DEFAULT MAP option, or CREATE PROFILE DEFAULT MAP option.

See "GRANT MAP" in Teradata Vantage™ - SQL Data Control Language, B035-1149.