function QueryConditionInterface::isNull
Sets a condition that the specified field be NULL.
Parameters
$field: The name of the field to check.
Return value
QueryConditionInterface The called object.
6 methods override QueryConditionInterface::isNull()
- DatabaseCondition::isNull in includes/
database/ query.inc - Implements QueryConditionInterface::isNull().
- DeleteQuery::isNull in includes/
database/ query.inc - Implements QueryConditionInterface::isNull().
- MergeQuery::isNull in includes/
database/ query.inc - Implements QueryConditionInterface::isNull().
- SelectQuery::isNull in includes/
database/ select.inc - Sets a condition that the specified field be NULL.
- SelectQueryExtender::isNull in includes/
database/ select.inc - Sets a condition that the specified field be NULL.
File
-
includes/
database/ query.inc, line 71
Class
- QueryConditionInterface
- Interface for a conditional clause in a query.
Code
public function isNull($field);Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.