17.05 - Unsupported Syntax or Features - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1146-175K
Language
English (United States)

This table lists unsupported syntax or features. Attempt to use them causes an error.

Unsupported Syntax Explanation
INSERT … SELECT None.
Positioned UPDATE A WHERE clause cannot use an updatable cursor to do a positioned UPDATE.
UPDATE … FROM None.
UPDATE … WHERE subquery A WHERE clause cannot use a subquery either to specify the primary index or to constrain a non-index column.
UPDATE … SET … primary_index_column You cannot update a primary index column because any change to the rowhash value for a row affects its distribution.
UPDATE … SET … partitioning_column You cannot update a partitioning column because any change to the partitioning for a row affects its location.
UPDATE … SET identity_column … You cannot update GENERATED ALWAYS identity column values.
UPDATE SET PARTITION You cannot update system-derived PARTITION values.

If PARTITION is a user-named column in a table, and not a GENERATED ALWAYS identity column, then it can be updated.