/**
* @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->context->statements)) {
$this->context->statements[$clause] = array_map(array($this, 'createUndefinedJoins'), $this->context->statements[$clause]);
}
}
return parent::buildQuery();
}
protected function buildQuery()
{
$this->init();
return parent::buildQuery();
}
/**
* @param Query $query
* @param bool $clone whether to create independent query (cloned context)
* @return static
*/
public static function fromQuery(Query $query, $clone = false)
{
$context = $query->getContext(false);
return new static($clone && $context ? clone $context : $context);
}