17.00 - Example: Creating a Hash Index According to Order Date - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Release Date
September 2020
Content Type
Programming Reference
Publication ID
B035-1144-170K
Language
English (United States)

The following hash index is distributed on its primary index o_orderdate and stored in value order on o_orderdate.

     CREATE HASH INDEX ord_hidx_1 (o_orderdate) ON orders
     BY (o_orderdate) 
     ORDER BY (o_orderdate);

You could also specify ORDER BY VALUES instead of ORDER BY.

Note that the ORDER BY column list complies with the rules that it be limited to a single column, that the column must be in the column_name_1 list, must be a numeric type, and must be four or fewer bytes.

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

     CREATE JOIN INDEX ord_jidx_1 AS
      SELECT (o_orderdate), (o_orderkey, orders.ROWID) 
      FROM orders
      ORDER BY o_orderdate
     PRIMARY INDEX (o_orderdate);