- DatabaseCondition::isNull in core/
includes/ database/ query.inc - Implements QueryConditionInterface::isNull().
- DeleteQuery::isNull in core/
includes/ database/ query.inc - Implements QueryConditionInterface::isNull().
- MergeQuery::isNull in core/
includes/ database/ query.inc - Implements QueryConditionInterface::isNull().
- SelectQuery::isNull in core/
includes/ database/ select.inc - Implements QueryConditionInterface::isNull().
- SelectQueryExtender::isNull in core/
includes/ database/ select.inc - Sets a condition that the specified field be NULL.
- UpdateQuery::isNull in core/
includes/ database/ query.inc - Implements QueryConditionInterface::isNull().