Santhosh Srinivasan resolved PIG-159.

    Resolution: Fixed

All patches have been reviewed and checked in as part of the types branch 

> Make changes to the parser to support new types functionality
> -------------------------------------------------------------
>                 Key: PIG-159
>                 URL: https://issues.apache.org/jira/browse/PIG-159
>             Project: Pig
>          Issue Type: Sub-task
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Santhosh Srinivasan
>         Attachments: parser_chages_v10.patch, parser_chages_v11.patch, 
> parser_chages_v12.patch, parser_chages_v13.patch, parser_chages_v5.patch, 
> parser_chages_v6.patch, parser_chages_v7.patch, parser_chages_v8.patch, 
> parser_chages_v9.patch
> In order to support the new types functionality described in 
> http://wiki.apache.org/pig/PigTypesFunctionalSpec, the parse needs to change 
> in the following ways:
> 1) AS needs to support types in addition to aliases.  So where previously it 
> was legal to say:
> a = load 'myfile' as a, b, c;
> it will now also be legal to say
> a = load 'myfile' as a integer, b float, c chararray;
> 2) Non string constants need to be supported.  This includes non-string 
> atomic types (integer, long, float, double) and the non-atomic types bags, 
> tuples, and maps.
> 3) A cast operator needs to be added so that fields can be explicitly casted.
> 4) Changes to DEFINE, to allow users to declare arguments and return types 
> for UDFs

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