$query = 'SELECT *   FROM "service__managers"  WHERE "host" = 'localhost' LIMIT 1 ';
//isFree() ensures that connection still exists and not busy
$result = $this->isFree() && pg_send_query($this->connection, $query)
    ? pg_get_result($this->connection) }
    : null;
if (is_resource($result)) {
// sometimes returns ['?column?' => "1"]
        $row = pg_fetch_array($this->resource, 0, $type);
}