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From "Shravan Matthur Narayanamurthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-161) Rework physical plan
Date Wed, 16 Apr 2008 00:40:22 GMT

    [ https://issues.apache.org/jira/browse/PIG-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12589374#action_12589374

Shravan Matthur Narayanamurthy commented on PIG-161:

To me the name relational operator does not make any sense at all. http://en.wikipedia.org/wiki/Relational_operator

For lack of better terms I just named them as top level operators. But I see your point. The
same operators can be nested too. So calling them top level does not make any sense either.

Guess we need some cleaner terminology.

Also, I wasn't planning to put Hadoop in PhysicalLayer. I was thinking of introducing a separate
Map Reduce Layer because really our code works that way. We have a logical layer, a physical
layer and then the physical plan, which is the output of the physical layer, is converted
into Map Reduce.

I guess we can leave it as is right now since package refactoring will involve a lot of work
on Alan's side as he is the only one with committer access. We can think about it and then
once we have consensus, we can refactor the code. But point taken. Thanks!

> Rework physical plan
> --------------------
>                 Key: PIG-161
>                 URL: https://issues.apache.org/jira/browse/PIG-161
>             Project: Pig
>          Issue Type: Sub-task
>            Reporter: Alan Gates
>            Assignee: Alan Gates
>         Attachments: arithmeticOperators.patch, incr2.patch, incr3.patch, incr4.patch,
Phy_AbsClass.patch, pogenerate.patch, pogenerate.patch, pogenerate.patch
> This bug tracks work to rework all of the physical operators as described in http://wiki.apache.org/pig/PigTypesFunctionalSpec

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