15.10 - Example: Creating a Hash Index According to Ship Date - 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 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);