[jira] [Commented] (PIG-3434) Null subexpression in bincond nullifies outer tuple (or bag)

["Mark Wagner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747789#comment-13747789 ] 

Mark Wagner commented on PIG-3434:
----------------------------------

I was able to reproduce this. It looks like POUserFunc isn't handling STATUS_NULL correctly. I'll make a patch.
                
> Null subexpression in bincond nullifies outer tuple (or bag)
> ------------------------------------------------------------
>
>                 Key: PIG-3434
>                 URL: https://issues.apache.org/jira/browse/PIG-3434
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Pavel Fedyakov
>
> According to docs, for bincond operator "If a Boolean subexpression results in null value, the resulting expression is null" (http://pig.apache.org/docs/r0.11.0/basic.html#nulls).
> It works as described in plain foreach..generate expression:
> {noformat}
> in = load 'in';
> out = FOREACH in GENERATE 1, ($0 > 0 ? 2 : 3);
> dump out;
> {noformat}
> in (3 lines, 2nd is empty):
> {noformat}
> 0
> 1
> {noformat}
> out:
> {noformat}
> (1,3)
> (1,)
> (1,2)
> {noformat}
> But if we wrap generated variables in tuple (or bag), we lose the whole 2nd line in output:
> {noformat}
> out = FOREACH in GENERATE (1, ($0 > 0 ? 2 : 3));
> {noformat}
> out:
> {noformat}
> ((1,3))
> ()
> ((1,2))
> {noformat}

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