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https://issues.apache.org/jira/browse/PIG-2597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kyungho Jeon updated PIG-2597:
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Attachment: current.08.11.2014.dot.diff
Hello all,
I am attaching my diff patch so far during GSoC 2014. It's not complete yet.
I have implemented {{set}}, {{clear}}, {{help}} commands in ANTLR. It
essentially means the commands are implemented in {{QueryParser}}.
I am in the middle of implementing {{fs}} command. As {{fs}} accepts parameters
and Grunt does not need to check or verify them, I am trying to define a
grammar that can accept any parameters after {{fs}}.
Another issue is that the newly implemented commands require semicolons after
them. This should be fixed soon.
My plan for continuing working on this project is as follows:
In September, I will
1. Finish the issues in {{fs}} commands
2. Fix the semicolon issue
After those issues fixed, we will need to implement {{sh}}, {{run}}, {{exec}},
{{history}}, {{kill}}, and {{quit}}. {{sh}} can be implemented in a similar way
as {{fs}}, but implementing remaining commands except for {{sh}} seems to me
requires quite a bit of changes. I will plan for them later or after fixing the
first two issues.
Lastly, thank you so much for letting me participating this program.
> 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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