$table->getQueryExecutor()->execute(
new \pq\Query\Writer(IDENTITY_SQL, array($table->getName())),
function($result) use($table, $cache) {
$this->columns = array_map("current", $result->fetchAll(\pq\Result::FETCH_ARRAY));
$table->getQueryExecutor()->execute(
new \pq\Query\Writer(IDENTITY_SQL, array($table->getName())),
function($result) use($table, $cache) {
$this->columns = array_map("current", $result->fetchAll(\pq\Result::FETCH_ARRAY));