DatabaseCondition::isNotNull in core/includes/database/query.inc
Sets a condition that the specified field be NOT NULL.
DeleteQuery::isNotNull in core/includes/database/query.inc
MergeQuery::isNotNull in core/includes/database/query.inc
Sets a condition that the specified field be NOT NULL.
SelectQuery::isNotNull in core/includes/database/select.inc
SelectQueryExtender::isNotNull in core/includes/database/select.inc
Sets a condition that the specified field be NOT NULL.
UpdateQuery::isNotNull in core/includes/database/query.inc