zendframework/zf2 — pull request #3451 by twmobius (2013-01-16 15:54:58+00:00)
Title: Added DISTINCT on Zend\Db\Sql\Select

Added a new method on the Zend\Db\Sql\Select object to perform a DISTINCT Select. When the distinct() method is called in the Select a DISTINCT keyword is added before the select's columns.

It should partially fix issue #2509