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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: NewParser-14.patch
A visitor for new logical plan. It does some schema validations, but it mainly
converts column alias in projection and de-reference to column index. However,
this patch doesn't process scalar projection yet.
Test-Patch run result:
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec]
[exec] +1 release audit. The applied patch does not increase the
total number of release audit warnings.
Ant test passes except a zebra test failure which doesn't seem to be related.
> Switch to new parser generator technology
> -----------------------------------------
>
> Key: PIG-1618
> URL: https://issues.apache.org/jira/browse/PIG-1618
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.8.0
> Reporter: Alan Gates
> Assignee: Xuefu Zhang
> Fix For: 0.9.0
>
> Attachments: antlr-3.2.jar, javadoc.patch, NewParser-1.patch,
> NewParser-10.patch, NewParser-11.patch, NewParser-12.patch,
> NewParser-13.2.patch, NewParser-13.patch, NewParser-14.patch,
> NewParser-2.patch, NewParser-3.patch, NewParser-3.patch, NewParser-4.patch,
> NewParser-5.patch, NewParser-6.patch, NewParser-7.patch, NewParser-8.patches,
> NewParser-9.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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