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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-161) Rework physical plan
Date Wed, 14 May 2008 18:14:55 GMT

    [ https://issues.apache.org/jira/browse/PIG-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12596861#action_12596861

Alan Gates commented on PIG-161:

A few comments on the logical to physical translator patch:

# The purpose of the scope value in the OperatorKey is to give a single value by which all
operators associated with a single job or a single session can be easily discovered.  So your
class GenPhyOp should get the scope (probably should be passed in as part of constructing
the class (except that I note all the methods are static) or otherwise initialized) and then
use that when generating the objects.
# GenPhyOp should use logicalLayer.parser.NodeIdGenerator rather than generating random numbers
for the OperatorKey
# LogToPhyTranslationVisitor should create its own walker, not depend on the caller to create
and pass it one.  Each visitor should know how it wants to walk the plan rather then letting
it's instantiator decide for it.  Same applies to the Printer visitors in the patch.

> 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, BinCondAndNegative.patch, incr2.patch,
incr3.patch, incr4.patch, incr5.patch, logToPhyTranslator.patch, MRCompilerTests_PlansAndOutputs.txt,
Phy_AbsClass.patch, physicalOps.patch, physicalOps.patch, physicalOps.patch, physicalOps.patch,
physicalOps_latest.patch, podistinct.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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