17.10 - Creating a Join Index on a Table with Valid Time - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Temporal Table Support

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1182-171K
Language
English (United States)

To create a join index on a table with valid time, precede the SELECT statement in the join index definition with a CURRENT VALIDTIME, NONSEQUENCED VALIDTIME, or SEQUENCED VALIDTIME qualifier. For example:

   CREATE JOIN INDEX Policy_JI AS
   CURRENT VALIDTIME SELECT Policy_ID, Policy_Type, Validity
   FROM Policy;

A join index that is current or sequenced in the valid-time dimension must project the valid-time column in the SELECT statement to ensure that the join index is used appropriately. Here, the Validity column is the valid-time column.