/**
* Returns the GROUP BY clauses ready for inserting into a query.
*
* @param SQLSelect $query The expression object to build from
* @param array $parameters Out parameter for the resulting query parameters
* @return string Completed group part of statement
*/
public function buildGroupByFragment(SQLSelect $query, array &$parameters)
{
$groupBy = $query->getGroupBy();
if (empty($groupBy)) {
return '';
}
$nl = $this->getSeparator();
return "{$nl}GROUP BY " . implode(', ', $groupBy);
}
