/* syntax version 1 */
/* postgres can not */
/* dq file can not */
$udfScript = @@
def MyFunc(stream):
    return stream
@@;

$record = (SELECT TableRow() FROM plato.Input);
$recordType = TypeOf(Unwrap($record));
$streamType = StreamType(VariantType(TupleType($recordType, $recordType, $recordType)));
$udf = Python3::MyFunc(CallableType(0, $streamType, $streamType), $udfScript);

$src = (select * from plato.Input where key > "200");

$i, $j, $k = (PROCESS plato.Input, (select * from plato.Input where key > "100"), $src USING $udf(TableRows()));

select * from $i;

select * from $j;

select * from $k;