id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
16573,"meta_query doesnt support ""empty"" values",dd32,,"Basically, a meta_value of '0' is ignored in meta queries, It bases it on empty(), so a meta value being ""empty"" is ignored. 

This mainly comes into play for numeric comparisons, ie. field >= 0 (do not want -50 etc)

Code: [http://core.trac.wordpress.org/browser/trunk/wp-includes/meta.php?rev=17170#L423 Line 423] change from empty() to strlen()?

Core includes a [http://core.trac.wordpress.org/changeset/17088#file2 hack] to work around this already",defect (bug),closed,normal,,Query,3.1,normal,duplicate,needs-patch,