/**
* {@inheritdoc}
*/
public function getGroup()
{
$group = parent::getGroup();
if (!empty($group) && $this->ds->getDbType() === 'pgsql') {
foreach ($this->columnMap as $table => $columns) {
$pk = ($table === 'objects' ? 'cvo.' : 'cvs.') . $this->getPrimaryKeyColumn($table);
foreach ($columns as $alias => $_) {
if (!in_array($pk, $group, true) && in_array($alias, $group, true)) {
$group[] = $pk;
break;
}
}
}
}
return $group;
}
