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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2176) add logical plan assumption checker
Date Thu, 11 Aug 2011 00:35:27 GMT

    [ https://issues.apache.org/jira/browse/PIG-2176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13082812#comment-13082812
] 

Daniel Dai commented on PIG-2176:
---------------------------------

+1

> add logical plan assumption checker 
> ------------------------------------
>
>                 Key: PIG-2176
>                 URL: https://issues.apache.org/jira/browse/PIG-2176
>             Project: Pig
>          Issue Type: Improvement
>    Affects Versions: 0.9.0
>            Reporter: Thejas M Nair
>             Fix For: 0.10
>
>         Attachments: PIG-2176.1.patch, PIG-2176.2.patch
>
>
> Pig expects certain things about LogicalPlan, and optimizer logic depends on those to
be true. Could that verifies that these assumptions are true will help in catching issues
early on. 
> Some of the assumptions that should be checked - 
> 1. All schema have valid uid . (not -1).
> 2. All fields in schema have distinct uid. 

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