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https://issues.apache.org/jira/browse/SPARK-2106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028709#comment-14028709
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Michael Armbrust commented on SPARK-2106:
-----------------------------------------
SchemaRDD has a method `queryExecution` that is not protected.
> Unify the HiveContext
> ---------------------
>
> Key: SPARK-2106
> URL: https://issues.apache.org/jira/browse/SPARK-2106
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Cheng Hao
>
> I've been working on CLI for Catalyst, and from the CLI point of view,
> HiveContext may be required some changes as:
> - SessionState management
> `SessionState` instance creation & initialization should be done within the
> wrappers, e.g. in `SharkCliDriver` or `CLIService` etc. cause they know
> better how to load the user configuration and logger redirection etc. And in
> HiveContext, it can retrieve SessionState by calling `SessionState.get()`.
> - HiveContext API may not be enough for CLI
> 1) Retrieving the schema from the output of `SELECT`; but the internal class
> `QueryExecution` is hidden for CLI.
> 2) Retriveing the HQL result in CLI, besides the string based result, CLI
> also need to know the error code, as well as the call stack if exceptions
> thrown.
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