From 2084dc7f8fd4c03af5091520983dd3e304773734 Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Mon, 29 Sep 2008 21:24:24 +0000
Subject: [PATCH] tag__not_in and category__not_in query fixes. see #7599

git-svn-id: https://develop.svn.wordpress.org/trunk@9031 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-includes/query.php | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/wp-includes/query.php b/wp-includes/query.php
index 2a55237361..9dc94273e4 100644
--- a/wp-includes/query.php
+++ b/wp-includes/query.php
@@ -1803,11 +1803,11 @@ class WP_Query {
 		if ( !empty($q['category__not_in']) ) {
 			if ( $wpdb->has_cap( 'subqueries' ) ) {
 				$cat_string = "'" . implode("', '", $q['category__not_in']) . "'";
-				$whichcat .= " AND $wpdb->posts.ID NOT IN (SELECT $wpdb->term_relationships.object_id FROM $wpdb->term_relationships WHERE $wpdb->term_relationships.term_taxonomy_id IN ($cat_string) )";
+				$whichcat .= " AND $wpdb->posts.ID NOT IN ( SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy = 'category' AND tt.term_id IN ($cat_string) )";
 			} else {
 				$ids = get_objects_in_term($q['category__not_in'], 'category');
 				if ( is_wp_error( $ids ) )
-					return $ids;
+					$ids = array();
 				if ( is_array($ids) && count($ids > 0) ) {
 					$out_posts = "'" . implode("', '", $ids) . "'";
 					$whichcat .= " AND $wpdb->posts.ID NOT IN ($out_posts)";
@@ -1894,10 +1894,17 @@ class WP_Query {
 		}
 
 		if ( !empty($q['tag__not_in']) ) {
-			$ids = get_objects_in_term($q['tag__not_in'], 'post_tag');
-			if ( is_array($ids) && count($ids > 0) ) {
-				$out_posts = "'" . implode("', '", $ids) . "'";
-				$whichcat .= " AND $wpdb->posts.ID NOT IN ($out_posts)";
+			if ( $wpdb->has_cap( 'subqueries' ) ) {
+				$tag_string = "'" . implode("', '", $q['tag__not_in']) . "'";
+				$whichcat .= " AND $wpdb->posts.ID NOT IN ( SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy = 'post_tag' AND tt.term_id IN ($tag_string) )";
+			} else {
+				$ids = get_objects_in_term($q['tag__not_in'], 'post_tag');
+				if ( is_wp_error( $ids ) )
+					$ids = array();
+				if ( is_array($ids) && count($ids > 0) ) {
+					$out_posts = "'" . implode("', '", $ids) . "'";
+					$whichcat .= " AND $wpdb->posts.ID NOT IN ($out_posts)";
+				}
 			}
 		}