public function ConditionInterface::isNull in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Database/Query/ConditionInterface.php \Drupal\Core\Database\Query\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\Query

Code

public function isNull($field);