Review Request: PIG-3342 Allow conditions in case statement

[Cheolsoo Park]

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https://reviews.apache.org/r/11613/
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Review request for pig.


Description
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Allows condition expression in case statement.


This addresses bug PIG-3342.
    https://issues.apache.org/jira/browse/PIG-3342


Diffs
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  src/org/apache/pig/parser/AstPrinter.g c2abede 
  src/org/apache/pig/parser/AstValidator.g 2c6d4dc 
  src/org/apache/pig/parser/LogicalPlanGenerator.g 9375d60 
  src/org/apache/pig/parser/QueryParser.g 2b84c86 
  test/org/apache/pig/test/TestCase.java dbee495 

Diff: https://reviews.apache.org/r/11613/diff/


Testing
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All unit tests pass.


Thanks,

Cheolsoo Park