16.20 - Example: Creating a Secondary Index on a Join Index - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Content Type
Programming Reference
Publication ID
B035-1144-162K
Language
English (United States)
Last Update
2019-05-24
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"