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https://issues.apache.org/jira/browse/PIG-2176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thejas M Nair updated PIG-2176:
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Attachment: PIG-2176.2.patch
PIG-2176.2.patch - fixes issues found during unit test failures. Given that
there were these unit test failures, there is some risk in the change, and that
this is not a bug fix, i would push this into 0.10 only.
> 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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