16.20 - Collecting Statistics on Unique Join Indexes - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Detailed Topics

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1184-162K
Language
English (United States)

You should always collect statistics on the primary index of a unique join index, whether it is user-defined or system-defined, so the Optimizer can use those statistics to most accurately estimate the cost of using a particular unique join index.