[jira] [Updated] (PIG-2031) NPE in TOP

["Dmitriy V. Ryaboy (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-2031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitriy V. Ryaboy updated PIG-2031:
-----------------------------------

    Attachment: PIG-2031.patch

Added a test (and while I was in there, simplified out some unnecessary casts in TestBuiltin).

I think this is good to commit, I intend to commit to both 0.10 branch and trunk tomorrow .
                
> NPE in TOP
> ----------
>
>                 Key: PIG-2031
>                 URL: https://issues.apache.org/jira/browse/PIG-2031
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Jacob Perkins
>            Assignee: Jacob Perkins
>              Labels: newbie
>         Attachments: PIG-2031.patch, toppatch.txt
>
>
> If a NULL DataBag is passed to org.apache.pig.builtin.TOP then a NPE is thrown. Consider:
> {code}
> $: cat foo.tsv
> a  {(foo,1),(bar,2)}
> b
> c  {(fyha,4),(asdf,9)}
> {code}
> then:
> {code}
> data  = LOAD 'foo.tsv' AS (key:chararray, a_bag:bag {t:tuple (name:chararray, value:int)});
> tpd   = FOREACH data {
>           top_n = TOP(1, 1, a_bag);
>           GENERATE
>             key   AS key,
>             top_n AS top_n
>           ;             
>         };
> DUMP tpd;
> {code}
> will throw an NPE when it gets to the row with no bag.

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