nacin aebd57c588 Add NOT EXISTS to meta queries, allowing you to query for the non-existence of a meta key. ...

You could already use EXISTS by omitting a value to check.

props georgestephanis, scribu
fixes #18158



git-svn-id: http://core.svn.wordpress.org/trunk@21185 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2012-06-29 19:59:29 +00:00

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