17.05 - column_partition_definition - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1144-175K
Language
English (United States)

The format to be used for the storage of a column partition. A column partition consists either of a series of containers or a series of subrows.

You can only specify this option for a column-partitioned table.

If you do not specify either COLUMN or ROW, then Vantage determines which format to use based on the width of the column partition value.

As a general rule, Vantage assigns COLUMN format to narrow column-valued partitions and ROW format to wide column-valued partitions.

The system autocompresses data as physical rows that are inserted into a column partition of a column-partitioned table unless there are no applicable autocompression methods that reduce the size of the physical row or you specify NO AUTO COMPRESS.