Ticket #25545: 25545.3.diff

src/wp-includes/ms-functions.php

@@ -275 +275 @@
 
         if ( $reassign != '' ) {
                 $reassign = (int) $reassign;
-                $wpdb->query( $wpdb->prepare("UPDATE $wpdb->posts SET post_author = %d WHERE post_author = %d", $reassign, $user_id) );
-                $wpdb->query( $wpdb->prepare("UPDATE $wpdb->links SET link_owner = %d WHERE link_owner = %d", $reassign, $user_id) );
+                $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $user_id ) );
+                $link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->links WHERE link_owner = %d", $user_id ) );
 
-                $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $reassign ) );
-                array_map( 'clean_post_cache', $post_ids ); 
+                if ( ! empty( $post_ids ) ) {
+                        $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_author = %d WHERE ID IN (" . implode( ',', $post_ids ) . ")", $reassign ) );
+                        array_walk( $post_ids, 'clean_post_cache' );
+                }
+
+                if ( ! empty( $link_ids ) ) {
+                        $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->links SET link_owner = %d WHERE ID IN (" . implode( ',', $link_ids ) . ")", $reassign ) );
+                        array_walk( $link_ids, 'clean_bookmark_cache' );
+                }
         }
 
         restore_current_blog();