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https://issues.apache.org/jira/browse/PIG-4974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Koji Noguchi updated PIG-4974:
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Attachment: pig-4974-type1-v01.patch
>From simple to complex, I can think of a couple of ways of fixing this.
(1) Take IdentityColumn UDF as a special case and forward loadcaster from the
argument. Attaching a patch for this (pig-4974-type1-v01.patch).
(2) Extend (1) and include any UDF that returns true for {{forwardLoadCaster}}
boolean method. This may help for udf like MapToBag discussed in PIG-3938.
(3) Extend (2) to allow udf to specify its own loadcaster.
I don't want to go to (3) for now. [~daijy], let me know your thoughts on this.
> A simple map reference fail to cast
> -----------------------------------
>
> Key: PIG-4974
> URL: https://issues.apache.org/jira/browse/PIG-4974
> Project: Pig
> Issue Type: Bug
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Attachments: pig-4974-type1-v01.patch
>
>
> {code}
> A = load 'input.txt' as (m:[bytearray]);
> B = FOREACH A GENERATE m#'a' as a, m#'e' as e;
> C = FILTER B by a != 'abc' and e != 'abc';
> store C into 'output';
> {code}
> This fails with
> {panel}
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 1075:
> Received a bytearray from the UDF or Union from two different Loaders. Cannot
> determine how to convert the bytearray to string
> {panel}
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