function ConditionInterface::isNull
Sets a condition that the specified field be NULL.
Parameters
string|\Drupal\Core\Database\Query\SelectInterface $field: The name of the field or a subquery to check.
Return value
$this The called object.
2 methods override ConditionInterface::isNull()
- Condition::isNull in core/
lib/ Drupal/ Core/ Database/ Query/ Condition.php - Sets a condition that the specified field be NULL.
- SelectExtender::isNull in core/
lib/ Drupal/ Core/ Database/ Query/ SelectExtender.php - Sets a condition that the specified field be NULL.
File
-
core/
lib/ Drupal/ Core/ Database/ Query/ ConditionInterface.php, line 100
Class
- ConditionInterface
- Interface for a conditional clause in a query.
Namespace
Drupal\Core\Database\QueryCode
public function isNull($field);