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https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12593773#action_12593773
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Pi Song commented on PIG-158:
-----------------------------
Santhosh,
4. I think my scoping was really ambiguous. Here is what I actually meant :-
For each output column:-
Case 1: Alias is explicitly given. We associate the given alias with output
column.
Case 2: Alias is not given. If the column is used as it is (eg. $1, $2 in
example), we just propagate input alias to the output. If user manipulates the
column somehow (eg. $2+1 in example), the output column should not be given an
alias.
> 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, ParserErrors.txt, visitorWalker.patch
>
>
> Rework the logical plan in line with
> http://wiki.apache.org/pig/PigExecutionModel
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