More relaxed filtering for rawQuery()

MysqliDb.php

@@ -160,7 +160,8 @@ class MysqliDb
      */
     public function rawQuery($query, $bindParams = null)
     {
-        $this->_query = filter_var($query, FILTER_SANITIZE_STRING);
+        $this->_query = filter_var ($query, FILTER_SANITIZE_MAGIC_QUOTES,
+                                    FILTER_FLAG_NO_ENCODE_QUOTES);
         $stmt = $this->_prepareQuery();
 
         if (is_array($bindParams) === true) {