pig-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mark Wagner (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PIG-3434) Null subexpression in bincond nullifies outer tuple (or bag)
Date Tue, 03 Sep 2013 20:53:52 GMT

     [ https://issues.apache.org/jira/browse/PIG-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mark Wagner updated PIG-3434:
-----------------------------

    Release Note: Nevermind, I was confused. This is ready to be reviewed.
          Status: Patch Available  (was: Open)
    
> 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
>    Affects Versions: 0.11
>            Reporter: Pavel Fedyakov
>            Assignee: Mark Wagner
>             Fix For: 0.12
>
>         Attachments: PIG-3434.1.patch
>
>
> 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}

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message