/**
* @return string
*/
protected function buildQuery()
{
# first create extra join from statements with columns with referenced tables
$statementsWithReferences = array('WHERE', 'SELECT', 'GROUP BY', 'ORDER BY');
foreach ($statementsWithReferences as $clause) {
if (array_key_exists($clause, $this->statements)) {
$this->statements[$clause] = array_map(array($this, 'createUndefinedJoins'), $this->statements[$clause]);
}
}
return parent::buildQuery();
}
