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From "Pi Song (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-158) Rework logical plan
Date Fri, 09 May 2008 22:17:55 GMT

    [ https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595740#action_12595740
] 

Pi Song commented on PIG-158:
-----------------------------

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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