protected function _getRecordLabelSqlForModel($tableAlias, $modelName) {
        $model = $this->_getModelFromModelName($modelName);

        $tableName = $this->_getOtherTableName($modelName);
        $recordLabelFieldDefs = $this->_getRecordLabelFieldDefinitions($tableAlias, $model);

        $labelColumnsListSql = implode(', ', $recordLabelFieldDefs);
        $glue = $this->_modelHasFirstAndLastNameListFields($model) ? ' ' : ', ';
        $sql = "CONVERT(CONCAT_WS('{$glue}', " . $labelColumnsListSql . ') USING utf8)';

        return $sql;
    }