function SelectExtender::isNull

Sets a condition that the specified field be NULL.

Parameters

$field: The name of the field to check.

Return value

Drupal\Core\Database\Query\ConditionInterface The called object.

Overrides ConditionInterface::isNull

File

drupal/core/lib/Drupal/Core/Database/Query/SelectExtender.php, line 274

Definition of Drupal\Core\Database\Query\SelectExtender

Class

SelectExtender

The base extender class for Select queries.

Namespace

Code

function isNull($field) {
  $this->query
    ->isNull($field);
  return $this;
}