UDF error?

[Yang]

I wrote a super simple UDF, but got some errors:

UDF:

package yy;
import org.apache.hadoop.hive.ql.exec.UDF;
import java.util.Random;
import java.util.UUID;
import java.lang.management.*;

public class MyUdf extends UDF {
        static Random rand = new Random(System.currentTimeMillis() +
Thread.currentThread().getId()* 1000000);
        String name = ManagementFactory.getRuntimeMXBean().getName();
        long startValue = Long.valueOf(name.replaceAll("[^\\d]+", "")) *
10000 + Thread.currentThread().getId() * 1000;
        public long evaluate(long x ) {
                //return (long)UUID.randomUUID().hashCode();
                //return rand.nextLong();
                return startValue++;
        }
}





sql script:

CREATE TEMPORARY FUNCTION gen_uniq2 AS 'yy.MyUdf';
select gen_uniq2(field1), field2
from yy_mapping limit 10;

field1 is bigint, field2 is int





error:

hive> source aa.sql;
Added ./MyUdf.jar to class path
Added resource: ./MyUdf.jar
OK
Time taken: 0.0070 seconds
FAILED: SemanticException [Error 10014]: Line 2:7 Wrong arguments 'field1':
No matching method for class yy.MyUdf with (bigint). Possible choices:
_FUNC_()





so I'm declaring a UDF with arg of long, so that should work for a bigint
(more importantly it's complaining not long vs bigint, but bigint vs void
). I tried changing both to int, same failure


thanks!
yang