[jira] [Commented] (SPARK-17190) Removal of HiveSharedState

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-17190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431251#comment-15431251 ] 

Apache Spark commented on SPARK-17190:
--------------------------------------

User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/14757

> Removal of HiveSharedState
> --------------------------
>
>                 Key: SPARK-17190
>                 URL: https://issues.apache.org/jira/browse/SPARK-17190
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Xiao Li
>
> Since `HiveClient` is used to interact with the Hive metastore, it should be hidden in `HiveExternalCatalog`. After moving `HiveClient` into `HiveExternalCatalog`, `HiveSharedState` becomes a wrapper of `HiveExternalCatalog`. Thus, removal of `HiveSharedState` becomes straightforward. After removal of `HiveSharedState`, the reflection logic is directly applied on the choice of `ExternalCatalog` types, based on the configuration of `CATALOG_IMPLEMENTATION`. 
> `HiveClient` is also used/invoked by the other entities besides HiveExternalCatalog, we defines the following two APIs:
> {noformat}
>   /**
>    * Return the existing [[HiveClient]] used to interact with the metastore.
>    */
>   def getClient: HiveClient
>   /**
>    * Return a [[HiveClient]] as a new session
>    */
>   def getNewClient: HiveClient
> {noformat}



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