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.
- UpdateQuery::isNull in includes/
database/ query.inc - Implements QueryConditionInterface::isNull().
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