complex type casting should return null on casting failure
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Key: PIG-1989
URL: https://issues.apache.org/jira/browse/PIG-1989
Project: Pig
Issue Type: Bug
Affects Versions: 0.9.0
Reporter: Thejas M Nair
Fix For: 0.9.0
When casting fails for complex objects, pig is currently returning un-casted
object if the cast fails.
It should return null instead. That is consistent with the behavior when
casting to other basic types.
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