16.20 - Example: Creating a Hash Index on Orders by Order Date - 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
Language
English (United States)
Last Update
2019-05-24
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The following hash index is distributed on o_orderkey (the primary index for the base table Orders) and stored in value order on o_orderdate:

     CREATE HASH INDEX ord_hidx_5 (o_orderdate) ON orders
      ORDER BY (o_orderdate);

Equivalently, you could specify ORDER BY VALUES instead of ORDER BY.

This creates an index that is equivalent in structure to the following join index:

     CREATE JOIN INDEX ord_jidx_5 AS
      SELECT (o_orderdate), (o_orderkey, orders.ROWID) 
      FROM orders
      ORDER BY o_orderdate
     PRIMARY INDEX (o_orderkey);