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https://issues.apache.org/jira/browse/PIG-2597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357912#comment-14357912
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Kyungho Jeon commented on PIG-2597:
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Hi, I feel really sorry that I couldn't finish this last year. I wanted to
continue working on this after the summer but never had a chance. I came here
since I was thinking about working on this again, but found [~dilipramesh] is
interested in this. Good luck, if you decided to submit a proposal and work on
this. As [~daijy] mentioned, it is not an easy feature to implement. I had an
impression that this requires a lot more changes than it seems (and I
anticipated)...
> Move grunt from javacc to ANTLR
> -------------------------------
>
> Key: PIG-2597
> URL: https://issues.apache.org/jira/browse/PIG-2597
> Project: Pig
> Issue Type: Improvement
> Reporter: Jonathan Coveney
> Assignee: Daniel Dai
> Labels: gsoc2014
> Attachments: current.08.11.2014.dot.diff, pig02.diff
>
>
> Currently, the parser for queries is in ANTLR, but Grunt is still javacc. The
> parser is very difficult to work with, and next to impossible to understand
> or modify. ANTLR provides a much cleaner, more standard way to generate
> parsers/lexers/ASTs/etc, and moving from javacc to Grunt would be huge as we
> continue to add features to Pig.
> This is a candidate project for Google summer of code 2014. More information
> about the program can be found at
> https://cwiki.apache.org/confluence/display/PIG/GSoc2014
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