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https://issues.apache.org/jira/browse/PIG-463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich updated PIG-463:
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Status: Patch Available (was: Open)
> Strings (or other typed data) stored in maps cause problems with implicit
> casts in operations
> ---------------------------------------------------------------------------------------------
>
> Key: PIG-463
> URL: https://issues.apache.org/jira/browse/PIG-463
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Pradeep Kamath
> Assignee: Pradeep Kamath
> Fix For: types_branch
>
> Attachments: PIG-463.patch
>
>
> If a map in pig (say returned from a UDF) has a key with the value being a
> string, then a lookup of that key being used in a context which expects a
> string will cause an implicit cast to a string. This is because the Pig
> frontented (logical layer) thinks of all map "values" as bytearrays and hence
> introduces a Cast to convert the bytearray to string. The POCast class then
> assumes its input is a DataByteArray and first tries to cast its input to
> DataByteArray. This fails because the object in the input to the case which
> is the value in the map is in fact already a string. So in these cases, we
> should not try to cast but just return the input object in the POCast.
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