/** * Implements Drupal\Core\Database\Query\ConditionInterface::isNull(). */ public function isNull($field) { $this->condition->isNull($field); return $this; }
/** * Sets a condition in the HAVING clause that the specified field be NULL. * * @param $field * The name of the field to check. * * @return $this */ public function havingIsNull($field) { $this->having->isNull($field); return $this; }