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https://issues.apache.org/jira/browse/HIVE-22578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aron Hamvas updated HIVE-22578:
-------------------------------
    Fix Version/s: 4.0.0

> CBO genOPTree is not failsafe for CTAS and VIEW statements
> ----------------------------------------------------------
>
>                 Key: HIVE-22578
>                 URL: https://issues.apache.org/jira/browse/HIVE-22578
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO
>    Affects Versions: 3.0.0, 3.1.2
>            Reporter: Aron Hamvas
>            Assignee: Aron Hamvas
>            Priority: Major
>             Fix For: 3.0.1, 4.0.0, 3.1.3
>
>         Attachments: HIVE-22578.2.patch, HIVE-22578.patch
>
>
> If CBO fails during OT generation, it is supposed to skip CBO and fall back 
> to SemanticAnalyzer generating the OT for the original AST. However, for CTAS 
> and VIEW statements, the original AST is discarded and replaced with the new 
> AST. 
> If OT generation for the new AST fails with a SemanticException, the 
> compilation is destined to fail completely since we cannot fall back to the 
> original and possibly valid AST.
> Also, the SemanticException sometimes gets hidden and misjudged as a missing 
> column statistics issue due to bad error handling.



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