17.10 - ALTER TABLE TO CURRENT Processing - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1144-171K
Language
English (United States)

During ALTER TABLE TO CURRENT processing, if the starting expression with the newly resolved DATE, CURRENT_DATE, or CURRENT_TIMESTAMP value does not fall on a partition boundary, Vantage must scan all of the rows before repartitioning the rows based on the new partitioning expression. Column partitioned tables must be empty before using ALTER TABLE TO CURRENT.

For an ALTER TABLE TO CURRENT operation where an all-row scan is unnecessary, the table can contain data.