Single-Table Join Indexes - Advanced SQL Engine - Teradata Database

SQL Fundamentals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
17.00
Published
June 2020
Language
English (United States)
Last Update
2021-01-24
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B035-1141
lifecycle
previous
Product Category
Teradata Vantageâ„¢

Single-table join indexes are very useful for resolving joins on large tables without having to redistribute the joined rows across the AMPs.

Single-table join indexes facilitate joins by hashing a frequently joined subset of base table columns to the same AMP as the table rows to which they are frequently joined. This enhanced geography eliminates BYNET traffic as well as often providing a smaller sized row to be read and joined.