15.10 - Example: Creating a Hash Index According to Ship Date by Order Number - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

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

     CREATE HASH INDEX line_hidx_6 (l_shipdate) ON lineitem
     BY (l_shipdate) 
     ORDER BY VALUES;

Note that the ordering column of the base table complies with the rules that it be limited to a single numeric column four or fewer bytes in length.

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

     CREATE JOIN INDEX line_jidx_6 AS
      SELECT (l_orderkey), (l_shipdate, lineitem.ROWID) 
      FROM lineitem
      ORDER BY l_orderkey
     PRIMARY INDEX (l_shipdate);