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Home » API reference » Drupal 7 » query.inc » QueryConditionInterface » QueryConditionInterface::isNull

6 methods override QueryConditionInterface::isNull() in Drupal 7

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().