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https://issues.apache.org/jira/browse/PIG-5048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15602951#comment-15602951
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Nandor Kollar commented on PIG-5048:
------------------------------------
It seems that with this trivial modification in UnlimitedNullTuple
{code}
public int size() {
return -1;
}
{code}
the UDAF gives the (almost) correct result, though I'm afraid this is not the
best solution. I say almost, because I also noticed, that there is an extra
empty tuple at the end (no idea why), but this is present even when the
projection includes both a0 and explode(a0). Also, it would be nice to
implement the other methods in this class, [~daijy] if you don't mind, can
attach a patch.
> HiveUDTF fail if it is the first expression in projection
> ---------------------------------------------------------
>
> Key: PIG-5048
> URL: https://issues.apache.org/jira/browse/PIG-5048
> Project: Pig
> Issue Type: Bug
> Components: impl
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.17.0, 0.16.1
>
>
> The following script fail:
> {code}
> define explode HiveUDTF('explode');
> A = load 'bag.txt' as (a0:{(b0:chararray)});
> B = foreach A generate explode(a0);
> dump B;
> {code}
> Message: Unimplemented at
> org.apache.pig.data.UnlimitedNullTuple.size(UnlimitedNullTuple.java:31)
> If it is not the first projection, the script pass:
> {code}
> define explode HiveUDTF('explode');
> A = load 'bag.txt' as (a0:{(b0:chararray)});
> B = foreach A generate a0, explode(a0);
> dump B;
> {code}
> Thanks [~nkollar] reporting it!
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