DatabaseCondition::exists in core/includes/database/query.inc

Implements QueryConditionInterface::exists().

DeleteQuery::exists in core/includes/database/query.inc

Implements QueryConditionInterface::exists().

MergeQuery::exists in core/includes/database/query.inc

Implements QueryConditionInterface::exists().

SelectQuery::exists in core/includes/database/select.inc

Implements QueryConditionInterface::exists().

SelectQueryExtender::exists in core/includes/database/select.inc

Sets a condition that the specified subquery returns values.

UpdateQuery::exists in core/includes/database/query.inc

Implements QueryConditionInterface::exists().