Patent Number: 8,818,987

Title: Converting union commands to union all commands

Abstract: In one aspect, a method is provided. The method includes: (1) identifying in a query of a database a union command involving data in the database that is mutually exclusive; and (2) changing the union command to a union all command.

Inventors: Barsness; Eric L. (Pine Island, MN), Santosuosso; John M. (Rochester, MN)

Assignee: International Business Machines Corporation

International Classification: G06F 17/30 (20060101); G06F 7/00 (20060101)

Expiration Date: 8/26/12018