$this not $db

diff --git a/includes/db/DatabaseMysql.php b/includes/db/DatabaseMysql.php
index e985854..f86c405 100644 (file)
--- a/includes/db/DatabaseMysql.php
+++ b/includes/db/DatabaseMysql.php
@@ -336,7 +336,7 @@ class DatabaseMysql extends DatabaseBase {
                        $items[] = $this->tableName( $table ) . ' READ';
                }
                $sql = "LOCK TABLES " . implode( ',', $items );
-               $db->query( $sql, $method );
+               $this->query( $sql, $method );
        }
 
        public function unlockTables( $method ) {