Ashutosh Chauhan updated PIG-773:

    Attachment: pig-773.patch

Currently Parser assumes non-empty complex constants, so it fails when it 
encounters an empty complex constants. Patch is included which fixes this. A 
new regex production is added to process empty complex constants,

> Empty complex constants (empty bag, empty tuple and empty map) should be 
> supported
> ----------------------------------------------------------------------------------
>                 Key: PIG-773
>                 URL: https://issues.apache.org/jira/browse/PIG-773
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.2.0
>            Reporter: Pradeep Kamath
>            Priority: Minor
>         Attachments: pig-773.patch
> We should be able to create empty bag constant using {}, empty tuple constant 
> using (), empty map constant using [] within a pig script

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