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From "Pi Song (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (PIG-158) Rework logical plan
Date Sat, 24 May 2008 15:39:55 GMT

    [ https://issues.apache.org/jira/browse/PIG-158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12599552#action_12599552
] 

pi_song edited comment on PIG-158 at 5/24/08 8:39 AM:
------------------------------------------------------

Then, what we encounter here is an arithmetic bag operation

{noformat}
    *: Bag x Bag -> Bag
{noformat}

>From what I know, we never have a definition for this.

If you really want to support  A.$0 * A.$1 as a syntactic sugar, we can wrap them in another
inner FOREACH...GENERATE but I suggest just leave it for the moment. <== Sorry FOREACH...GENERATE
also doesn't work. Let's say I don't know.

PS. This also reminds me that we should also support this "quick projection" on top level

{noformat}
A = LOAD 'fil1' ;
B = A.($0,$1) ;
STORE B ;
{noformat}

Have a good weekend, Santhosh :D

      was (Author: pi_song):
    Then, what we encounter here is an arithmetic bag operation

{noformat}
    *: Bag x Bag -> Bag
{noformat}

>From what I know, we never have a definition for this.

If you really want to support  A.$0 * A.$1 as a syntactic sugar, we can wrap them in another
inner FOREACH...GENERATE but I suggest just leave it for the moment.

PS. This also reminds me that we should also support this "quick projection" on top level

{noformat}
A = LOAD 'fil1' ;
B = A.($0,$1) ;
STORE B ;
{noformat}

Have a good weekend, Santhosh :D
  
> 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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