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https://issues.apache.org/jira/browse/PIG-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xuefu Zhang updated PIG-1618:
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Attachment: antlr-3.2.jar
NewParser-1.patch
First patch to address the issue. With this patch, the generated parse can
parse pig script and generate a flat AST.
The patch contains antlr lib, but the lib may not be applied when it's patched.
(for me, it didn't.) In that case, so the attached lib, antlr-3.2.jar can be
put under pig lib directory.
> Switch to new parser generator technology
> -----------------------------------------
>
> 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
>
> Attachments: antlr-3.2.jar, NewParser-1.patch
>
>
> 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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