Ticket #9009: 9009-enhanced-2.diff

Users/denis/Sites/sem-pro/wp-includes/post.php

@@ -663 +663 @@
  * @uses $wpdb
  *
  * @param string $post_meta_key Key to search for when deleting.
+ * @param string $operator The SQL operator. Can be any of LIKE, NOT LIKE, REGEXP, NOT REGEXP
  * @return bool Whether the post meta key was deleted from the database
  */
-function delete_post_meta_by_key($post_meta_key) {
+function delete_post_meta_by_key($post_meta_key, $operator = false) {
         global $wpdb;
-        if ( $wpdb->query($wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_key = %s", $post_meta_key)) ) {
-                /** @todo Get post_ids and delete cache */
-                // wp_cache_delete($post_id, 'post_meta');
+        
+        switch ( $operator ) {
+        case 'LIKE':
+        case 'NOT LIKE':
+        case 'REGEXP':
+        case 'NOT REGEXP':
+                break;
+        default:
+                $operator = 'LIKE';
+        }
+        
+        $post_ids = $wpdb->get_col($wpdb->prepare("SELECT DISTINCT post_id FROM $wpdb->postmeta WHERE meta_key LIKE %s", $post_meta_key));
+        if ( $post_ids ) {
+                $wpdb->query($wpdb->prepare("DELETE FROM $wpdb->postmeta WHERE meta_key LIKE %s", $post_meta_key));
+                foreach ( $post_ids as $post_id )
+                        wp_cache_delete($post_id, 'post_meta');
                 return true;
         }
         return false;