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https://issues.apache.org/jira/browse/PIG-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852521#action_12852521
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Daniel Dai commented on PIG-1341:
---------------------------------

Also if we doing that, BinStorage is not "a reliable way to dump data and load 
it, without having to explicitly list all the fields and figure out their 
parts" (though it is already not). I think we shall provide some way for this 
use case. 

> BinStorage cannot convert DataByteArray to Chararray and results in 
> FIELD_DISCARDED_TYPE_CONVERSION_FAILED
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: PIG-1341
>                 URL: https://issues.apache.org/jira/browse/PIG-1341
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.6.0
>            Reporter: Viraj Bhat
>            Assignee: Richard Ding
>             Fix For: 0.7.0
>
>         Attachments: PIG-1341.patch
>
>
> Script reads in BinStorage data and tries to convert a column which is in 
> DataByteArray to Chararray. 
> {code}
> raw = load 'sampledata' using BinStorage() as (col1,col2, col3);
> --filter out null columns
> A = filter raw by col1#'bcookie' is not null;
> B = foreach A generate col1#'bcookie'  as reqcolumn;
> describe B;
> --B: {regcolumn: bytearray}
> X = limit B 5;
> dump X;
> B = foreach A generate (chararray)col1#'bcookie'  as convertedcol;
> describe B;
> --B: {convertedcol: chararray}
> X = limit B 5;
> dump X;
> {code}
> The first dump produces:
> (36co9b55onr8s)
> (36co9b55onr8s)
> (36hilul5oo1q1)
> (36hilul5oo1q1)
> (36l4cj15ooa8a)
> The second dump produces:
> ()
> ()
> ()
> ()
> ()
> It also throws an error message: FIELD_DISCARDED_TYPE_CONVERSION_FAILED 5 
> time(s).
> Viraj

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