zendframework/zf2 — pull request #6235 by turrsis (2014-05-07 08:15:39+00:00)
Title: Zend\Db\Sql implement decorable expression

implement decorable expression.
this PR is based on https://github.com/zendframework/zf2/pull/6234
only last commit ("add decorators for expression") for this PR? other commits from https://github.com/zendframework/zf2/pull/6234