public function query()
{
$conn = load::getConnection();
$sql = $this->get_sql();
$output = "";
$result = pg_query($conn, $sql);
if ($result && pg_num_rows($result) > 0) {
while ($row = pg_fetch_array($result)) {
$output .= $this->process_row($row);
}
}
pg_close($conn);
return $output;
}