Hadoop QA commented on PIG-989:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 820394.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified 
                        Please justify why no tests are needed for this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: 
Findbugs warnings: 
Console output: 

This message is automatically generated.

> Allow type merge between numerical type and non-numerical type
> --------------------------------------------------------------
>                 Key: PIG-989
>                 URL: https://issues.apache.org/jira/browse/PIG-989
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.5.0
>            Reporter: Daniel Dai
>         Attachments: PIG-989-1.patch
> Currently, we do not allow type merge between numerical type and 
> non-numerical type. And the error message is confusing. 
> Eg, if you run:
> a = load '1.txt' as (a0:chararray, a1:chararray);
> b = load '2.txt' as (b0:long, b1:chararray);
> c = join a by a0, b by b0;
> dump c;
> And the error message is "ERROR 1051: Cannot cast to Unknown"
> We shall:
> 1. Allow the type merge between numerical type and non-numerical type
> 2. Or at least, provide more meaningful error message to the user

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