16.20 - Example: Making Composite Changes to a Column: NOT NULL to NULL - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-24
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Composite changes to columns that involve changing the NOT NULL attribute to NULL are not valid. For example, the following cannot be done:

     ALTER TABLE abc ADD column_2 TITLE 'newname' NULL;

To make these changes, you must perform two separate ALTER TABLE requests:

     ALTER TABLE abc ADD column_2 TITLE 'newname';
     ALTER TABLE abc ADD column_2 NULL;