/**
* Строит WHERE часть запроса
* @internal
* @param ISelectBuilder|IUpdateBuilder|IDeleteBuilder $query
* @return string
*/
private function buildWherePart($query)
{
if (!($exprGroup = $query->getWhereExpressionGroup())) {
return '';
}
return "\nWHERE " . $this->buildExpressionGroup($exprGroup);
}