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https://issues.apache.org/jira/browse/HIVE-18778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16390299#comment-16390299
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Daniel Dai commented on HIVE-18778:
-----------------------------------
I am struggling to run tests locally, but hopefully I can get some sections
done in 1 or 2 days. Will keep you updated.
> Needs to capture input/output entities in explain
> -------------------------------------------------
>
> Key: HIVE-18778
> URL: https://issues.apache.org/jira/browse/HIVE-18778
> Project: Hive
> Issue Type: Bug
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Priority: Major
> Attachments: HIVE-18778.1.patch, HIVE-18778.2.patch
>
>
> With Sentry enabled, commands like explain drop table foo fail with {{explain
> drop table foo;}}
> {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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