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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-158) Rework logical plan
Date Fri, 04 Apr 2008 19:27:25 GMT

     [ https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Alan Gates updated PIG-158:

    Attachment: visitorWalker.patch

Attached is a patch with proposed interface changes to visitors to match my suggestion in
comment http://issues.apache.org/jira/browse/PIG-158?focusedCommentId=12584744#action_12584744

I apologize for all the extraneous changes in there, as I also changed ParseException to VisitorException
and that added 2-4 lines from a bunch of files.  The relevant files to look at are PlanVisitor,
PlanWalker, DependencyOrderWalker, DepthFirstWalker, and LOVisitor.  Changes to the existing
visitors is quite small.  All they need to do is instantiate the appropriate type of walker
at construction time.

Hopefully this will give us an idea of how the visitors would look and work in that propsoal.

> Rework logical plan
> -------------------
>                 Key: PIG-158
>                 URL: https://issues.apache.org/jira/browse/PIG-158
>             Project: Pig
>          Issue Type: Sub-task
>          Components: impl
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: logical_operators.patch, logical_operators_rev_1.patch, logical_operators_rev_2.patch,
logical_operators_rev_3.patch, visitorWalker.patch
> Rework the logical plan in line with http://wiki.apache.org/pig/PigExecutionModel

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