/**
* Adds the given subquery.
*
* @param QueryBuilder $queryBuilder
* @return self
* @throws InvalidArgumentException
*/
public function subquery(QueryBuilder $queryBuilder)
{
$this->subqueries[] = $queryBuilder->getSPARQL(false);
$this->usageValidator->trackDefinedVariables(implode(' ', $queryBuilder->getSelects()));
// @todo temp hack to add AS definitions to defined variables
$regexHelper = new RegexHelper();
$matches = $regexHelper->getMatches('AS \\{variable}', implode(' ', $queryBuilder->getSelects()));
$this->usageValidator->trackDefinedVariables($matches);
return $this;
}
