Need to generate empty tuples and bags as a part of Pig Syntax
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                 Key: PIG-561
                 URL: https://issues.apache.org/jira/browse/PIG-561
             Project: Pig
          Issue Type: New Feature
    Affects Versions: types_branch
            Reporter: Viraj Bhat
             Fix For: types_branch


There is a need to sometimes generate empty tuples and bags as a part of the 
Pig syntax rather than using UDF's
{code}
a = load 'mydata.txt' using PigStorage();
b =foreach a generate ( ) as emptytuple;
c = foreach a generate { } as emptybag;
dump c;
{code}


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