Ticket #13496: use-subquery-for-detached.13496.diff

wp-admin/upload.php

@@ -20 +20 @@
         if ( !current_user_can('edit_posts') )
                 wp_die( __('You are not allowed to scan for lost attachments.') );
 
-        $all_posts = implode( ',', $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type NOT IN ('attachment', '" . join("', '", get_post_types( array( 'public' => false ) ) ) . "')" ) );
-        $lost = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent > '0' and post_parent NOT IN ($all_posts)");
+        $lost = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE post_type = 'attachment' AND post_parent > '0' and post_parent NOT IN ( SELECT ID FROM $wpdb->posts WHERE post_type NOT IN ('attachment', '" . join("', '", get_post_types( array( 'public' => false ) ) ) . "') )");
         
         $_GET['detached'] = 1;