public function fromSelect(Gpf_SqlBuilder_SelectBuilder $selectBuilder)
{
$this->fromSelect = $selectBuilder->toString();
foreach ($selectBuilder->select->getColumns() as $column) {
if ($this->table !== null && !$this->table->hasColumn($column->getAlias())) {
throw new Gpf_Exception('Column ' . $column->getAlias() . " doesn't exist in {$this->tableName}.");
}
$i = count($this->columns);
$this->columns[$i]['column'] = $column->getAlias();
}
}
