/**
* @param QueryInterface $query
*
* @return Result|null
* @throws Exception
*/
public function process(QueryInterface $query)
{
/* @var $query SelectQuery */
if (!$query->isType(QueryInterface::TYPE_SELECT)) {
return null;
}
$field = $query->getFirstField();
if ($field->getType() !== Expression::TYPE_FUNCTION || $field->getExpression() !== Expression::EXPR_USER) {
return null;
}
return $this->getResultFromData(self::$data, self::$fields);
}
