17.10 - Example: Creating a Secondary Index on a Join Index - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1144-171K
Language
English (United States)
This example creates a secondary index on a join index named order_join_line:
     CREATE INDEX shipidx (l_shipdate) ON order_join_line;
A query against the base tables uses both indexes:
    SELECT o_orderdate, o_custkey, l_partkey, l_quantity, 
                    l_extendedprice
             FROM lineitem, order
             WHERE l_orderkey = o_orderkey
             AND   l_shipdate = '1997-09-18';
An EXPLAIN shows that the RETRIEVE step reads from the order_join_line join index table by way of the shipidx index:
    "order_join_line.l_shipdate = 970918"