public function DatabaseCondition::exists

Sets a condition that the specified subquery returns values.

Parameters

SelectQueryInterface $select: The subquery that must contain results.

Return value

QueryConditionInterface: The called object.

Overrides QueryConditionInterface::exists

File

core/includes/database/query.inc, line 1824

Non-specific Database query code. Used by all engines.

Class

DatabaseCondition

Generic class for a series of conditions in a query.

Code

public function exists(SelectQueryInterface $select) {
  return $this->condition('', $select, 'EXISTS');
}