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https://issues.apache.org/jira/browse/PIG-1974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016705#comment-13016705
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Daniel Dai commented on PIG-1974:
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The issue is because lineage only set caster if the input data type is
bytearray. However, if it is complex data type, we need to cast inner bytearray
to real type, we still rely on caster. So we need to set caster as well.
> Lineage need to set for every cast
> ----------------------------------
>
> Key: PIG-1974
> URL: https://issues.apache.org/jira/browse/PIG-1974
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.9.0
> Reporter: Daniel Dai
> Assignee: Thejas M Nair
> Fix For: 0.9.0
>
>
> The following script does not cast correctly:
> {code}
> a = load '1.txt' as (m:map[]);
> b = foreach a generate (map[chararray])m;
> dump b;
> {code}
> Pig throw warning that it cannot cast (map[chararray]) because caster is null.
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