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From "Daniel Dai (JIRA)" <>
Subject [jira] [Updated] (HIVE-18778) Needs to capture input/output entities in explain
Date Fri, 28 Sep 2018 22:00:00 GMT


Daniel Dai updated HIVE-18778:
    Attachment: HIVE-18778.12.branch-3.1.patch

> Needs to capture input/output entities in explain
> -------------------------------------------------
>                 Key: HIVE-18778
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>            Priority: Major
>         Attachments: HIVE-18778-SparkPositive.patch, HIVE-18778.1.patch, HIVE-18778.10.branch-3.patch,
HIVE-18778.11.branch-3.1.patch, HIVE-18778.11.branch-3.patch, HIVE-18778.12.branch-3.1.patch,
HIVE-18778.2.patch, HIVE-18778.3.patch, HIVE-18778.4.patch, HIVE-18778.5.patch, HIVE-18778.6.patch,
HIVE-18778.7.patch, HIVE-18778.8.patch, HIVE-18778.9.branch-3.patch, HIVE-18778.9.patch, HIVE-18778_TestCliDriver.patch,
HIVE-18788_SparkNegative.patch, HIVE-18788_SparkPerf.patch
> With Sentry enabled, commands like explain drop table foo fail with {{explain drop table
> {code}
> Error: Error while compiling statement: FAILED: SemanticException No valid privileges
>  Required privilege( Table) not available in input privileges
>  The required privileges: (state=42000,code=40000)
> {code}
> Sentry fails to authorize because the ExplainSemanticAnalyzer uses an instance of DDLSemanticAnalyzer
to analyze the explain query.
> {code}
> BaseSemanticAnalyzer sem = SemanticAnalyzerFactory.get(conf, input);
> sem.analyze(input, ctx);
> sem.validate()
> {code}
> The inputs/outputs entities for this query are set in the above code. However, these
are never set on the instance of ExplainSemanticAnalyzer itself and thus is not propagated
into the HookContext in the calling Driver code.
> {code}
> sem.analyze(tree, ctx); --> this results in calling the above code that uses DDLSA
> hookCtx.update(sem); --> sem is an instance of ExplainSemanticAnalyzer, this code
attempts to update the HookContext with the input/output info from ESA which is never set.
> {code}

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