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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-989) Allow type merge between numerical type and non-numerical type
Date Thu, 08 Oct 2009 18:21:31 GMT

     [ https://issues.apache.org/jira/browse/PIG-989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Dai updated PIG-989:
---------------------------

      Resolution: Fixed
    Hadoop Flags: [Reviewed]
          Status: Resolved  (was: Patch Available)

Patch committed

> 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, PIG-989-2.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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