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https://issues.apache.org/jira/browse/SPARK-17190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan updated SPARK-17190:
--------------------------------
Assignee: Xiao Li
> 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
> Assignee: Xiao Li
> Fix For: 2.1.0
>
>
> 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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