$first_node = 1210590;
$first  = $dbh->xdo(ph { "SELECT * WHERE node_id = $first_node" }); # Calls prepare and execute
$second_node = 1210586;
$second = $dbh->xdo(ph { "SELECT * WHERE node_id = $second_node" }); # Same query, skips prepare, calls execute
$third_node = 1210578;
$third  = $dbh->xdo(ph { "SELECT * WHERE node_id = $third_node " }); # Prepare still not called