All classes that implement QueryAggregateInterface in Drupal 8
- class \Drupal\Core\Entity\Query\Null\Query implements QueryAggregateInterface, QueryInterface
- class \Drupal\Core\Entity\Query\Sql\QueryAggregate implements QueryAggregateInterface
- class \Drupal\mongodb\Entity\QueryAggregate implements QueryAggregateInterface
- class \Drupal\workspace\EntityQuery\QueryAggregate uses QueryTrait
- class \Drupal\workspaces\EntityQuery\QueryAggregate uses QueryTrait