16.20 - ALTER TABLE TO CURRENT Processing - 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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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, Teradata Database 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.