Switch to new parser generator technology
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                 Key: PIG-1618
                 URL: https://issues.apache.org/jira/browse/PIG-1618
             Project: Pig
          Issue Type: Bug
    Affects Versions: 0.8.0
            Reporter: Alan Gates
            Assignee: Xuefu Zhang
             Fix For: 0.9.0


There are many bugs in Pig related to the parser, particularly to bad error 
messages.  After review of Java CC we feel these will be difficult to address 
using that tool.  Also, the .jjt files used by JavaCC are hard to understand 
and maintain.  

ANTLR is being reviewed as the most likely choice to move to, but other parsers 
will be reviewed as well.

This JIRA will act as an umbrella issue for other parser issues.

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