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From "Pi Song (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-158) Rework logical plan
Date Sat, 24 May 2008 00:23:56 GMT

    [ https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12599545#action_12599545
] 

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

Santhosh,

I don't understand what you meant by this:-
{noformat}
D = foreach C generate A.$0 * B.$1;
{noformat}

I guess "*" can be 2 things:-
1. Normal multiply. But in this case how can you know that A and B have to same number of
rows? so I think this case is undefined.
2. Cartesian product. In this case, no problem with the new meaning of LOProject.

> 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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