sorting on map-value fails if map-value is not of bytearray type
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                 Key: PIG-999
                 URL: https://issues.apache.org/jira/browse/PIG-999
             Project: Pig
          Issue Type: Bug
            Reporter: Thejas M Nair


When query execution plan is created by pig, it assumes the type to be 
bytearray because there is no schema information associated with map fields.
But at run time, the loader might return the actual type. This results in a 
ClassCastException.
This issue points to the larger issue of the way pig is handling types for 
map-value. 

This issue should be fixed in the context of revisiting the frontend logic and 
pig-latin semantics.

This is related to PIG-880 . The patch in PIG-880 changed PigStorage to always 
return bytearray for map values to work around this, but other loaders like 
BinStorage can return the actual type causing this issue.

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