Boone Gorges 56c82e534f Avoid redundant table joins in WP_Tax_Query.
IN clauses that are connected by OR require only a single table join. To avoid
extraneous joins, keep track of generated table aliases, and let sibling
clauses piggy-back on those aliases when possible.

Introduces WP_Tax_Query::sanitize_relation() to reduce some repeated code.

Adds unit tests to verify the JOIN consolidation, and integration tests for
cases where JOINS are being combined.

Props boonebgorges, otto42, jakub.tyrcha.
Fixes #18105.

git-svn-id: https://develop.svn.wordpress.org/trunk@29902 602fd350-edb4-49c9-b593-d223f7449a82
2014-10-15 16:39:19 +00:00
2014-08-21 02:53:16 +00:00
2014-10-14 19:47:11 +00:00
2014-09-05 19:44:38 +00:00
Description
No description provided
137 MiB
Languages
PHP 76.7%
CSS 10.9%
JavaScript 9.2%
Modelica 2.4%
HTML 0.6%
Other 0.2%