/**
* Constructs a new ezcQuerySubSelect object.
*
* The subSelect() method of the ezcQuery object creates an object of this
* class, and passes itself as $outer parameter to this constructor.
*
* @param ezcQuery $outer
*/
public function __construct(ezcQuery $outer)
{
$this->outerQuery = $outer;
if ($this->expr === null) {
$this->expr = $outer->createExpression();
}
}
