Xiao Li created SPARK-17190:
-------------------------------
Summary: Removal of HiveSharedState
Key: SPARK-17190
URL: https://issues.apache.org/jira/browse/SPARK-17190
Project: Spark
Issue Type: Bug
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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