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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-401) SplitIntroducer does not handle some cases correctly
Date Thu, 04 Sep 2008 23:53:44 GMT

     [ https://issues.apache.org/jira/browse/PIG-401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich updated PIG-401:
-------------------------------

    Priority: Critical  (was: Major)

> SplitIntroducer does not handle some cases correctly
> ----------------------------------------------------
>
>                 Key: PIG-401
>                 URL: https://issues.apache.org/jira/browse/PIG-401
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: types_branch
>            Reporter: Pradeep Kamath
>            Assignee: Alan Gates
>            Priority: Critical
>             Fix For: types_branch
>
>         Attachments: PIG-401-partial.patch
>
>
> The splitIntroducer does not handle the following cases correctly:
>    * As soon as SplitIntroducer sees an operator which does NOT have multiple outputs
it stops - it should still recursively check the successors:
> Current code which needs to change:
> {code}
>         List<LogicalOperator> sucs = mPlan.getSuccessors(root);
>         if(sucs==null) return; 
>         int size = sucs.size();
>         if(size==0 || size==1) return;  --> THIS should change to recursively process
the succesor if it exists(size == 1 case)
> {code}
>    * If there are more than one operators in the plan which need implicit splits to be
introduced
>    * If the new SPLIT operator is introduced before a cogroup, the cogroup's inner map
for it's inputs and GroupBy expressions needs to be updated
>    * The kind of changes need for cogroup maybe needed for some other operators 
> I started looking at it some and have a patch for the first two issues - *UNTESTED* which
I am attaching to this issue

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