17.10 - Redefining Primary Index, Primary AMP Index, or Partitioning without ALTER TABLE - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Detailed Topics

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1184-171K
Language
English (United States)

To redefine the primary index or partitioning for a table without using an ALTER TABLE request, see Procedure to Change Column Data Types. Refer to one of the following methods.

First method

  1. Copy the table into a newly defined table defined with a different primary index or primary AMP index (or without a primary index) and populate it using the CREATE TABLE AS syntax. See CREATE TABLE (AS Clause).
  2. Catalog the privileges on the old table. See Procedure to Change Column Data Types.
  3. Drop the original table. See DROP TABLE and Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.
  4. Rename the new table. See Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.
  5. Grant privileges on the new table. See Teradata Vantage™ - SQL Data Control Language, B035-1149.

Second method

  1. Create a new table with a different name that specifies the new index.
  2. Populate the new table using an INSERT ... SELECT request. See Teradata Vantage™ - SQL Data Manipulation Language, B035-1146.
  3. Catalog the privileges on the old table. See Procedure to Change Column Data Types.
  4. Drop the original table. See DROP TABLE and Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.
  5. Rename the new table with that of the old table. See Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.
  6. Grant privileges on the new table. See Teradata Vantage™ - SQL Data Control Language, B035-1149.