Example: Creating a Secondary Index on a Join Index - Teradata Vantage

Teradata® VantageCloud Lake

Deployment
VantageCloud
Edition
Lake
Product
Teradata Vantage
Published
January 2023
Language
English (United States)
Last Update
2024-04-03
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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"