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https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12586996#action_12586996
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Alan Gates commented on PIG-158:
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You can still save state, as it's the same visitor. The only state the visitor
is loosing is how it's walking. But it still knows what nodes its on, which it
switches to a nested plan, etc. I can't think of a case off the top of my head
where the visitor is limited by the fact that it isn't directly controlling the
graph traversal.
> 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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