17.05 - Example: Creating a Hash Index According to Ship Date - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1144-175K
Language
English (United States)

The following hash index is distributed implicitly on l_orderkey, the primary index for the base table lineitem, and stored explicitly in value order on l_shipdate:

     CREATE HASH INDEX line_hidx_5 (l_shipdate) ON lineitem
     ORDER BY (l_shipdate);

Equivalently, you could 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 join index:

     CREATE JOIN INDEX line_jidx_5 AS
      SELECT (l_shipdate), (l_orderkey, lineitem.ROWID)
      FROM lineitem
      ORDER BY l_shipdate
     PRIMARY INDEX (l_orderkey);