Bags have to contain tuples. It's how the type is defined.
2011/10/12 Stan Rosenberg <[email protected]>
> Hi,
>
> I have three constant udfs in jython:
>
> @outputSchema("m:map[bag{tuple()}]")
> def dummy1():
> return {"key":[("value1", "value2")]}
>
> @outputSchema("m:map[tuple()]")
> def dummy2():
> return {"key":("value1", "value2")}
>
> # doesn't work!
> @outputSchema("m:map[bag{}]")
> def dummy3():
> return {"key":["value1", "value2"]}
>
>
> The first two are fine. The last one which returns a map whose values
> are lists does not work. (I am getting ClassCastException:
> java.lang.String cannot be cast to org.apache.pig.data.Tuple).
> Could somebody explain why?
>
> Thanks,
>
> stan
>
