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https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595740#action_12595740
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Pi Song commented on PIG-158:
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So initially I thought List<Integer> is for storing a list of shallow columns.
Like
$0,$1,$2 will become Project(0,1,2)
Then after the singly-linkedlist comment in the code, I believed it is deep
projection like:-
$0.$1.$2, $1 will be come Project(0.1.2), Project(1)
Seems like setStar will be useful when you do the former one.
Could you please explain a bit more?
> 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,
> parser_changes.patch, parser_changes_v1.patch, parser_changes_v2.patch,
> parser_changes_v3.patch, parser_changes_v4.patch, ParserErrors.txt,
> visitorWalker.patch
>
>
> Rework the logical plan in line with
> http://wiki.apache.org/pig/PigExecutionModel
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