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https://issues.apache.org/jira/browse/HIVE-12679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15096992#comment-15096992
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Thejas M Nair commented on HIVE-12679:
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Note that SessionHiveMetaStoreClient implements logic for temp tables, as they
have a lifetime of a session. I am wondering if this config should determine
which IMetaStoreClient impl is used by SessionHiveMetaStoreClient, instead of
replacing SessionHiveMetaStoreClient itself.
Some changes to SessionHiveMetaStoreClient would be needed as well for that
approach, for it to accept configured IMetaStoreClient.
I am curious about the use case here. Are you interested in replacing the use
of thrift server because of any particular issues you see with it ?
Note that you can use metastore server can be used in embedded mode, which
means that the metastore client will effectively talk directly to the
persistent store (RDBMS or HBase in case of hbase metastore).
The hbase metastore work might possibly interest you -
https://issues.apache.org/jira/browse/HIVE-9452,
https://cwiki.apache.org/confluence/display/Hive/HBaseMetastoreDevelopmentGuide
> Allow users to be able to specify an implementation of IMetaStoreClient via
> HiveConf
> ------------------------------------------------------------------------------------
>
> Key: HIVE-12679
> URL: https://issues.apache.org/jira/browse/HIVE-12679
> Project: Hive
> Issue Type: Improvement
> Components: Configuration, Metastore, Query Planning
> Reporter: Austin Lee
> Assignee: Austin Lee
> Priority: Minor
>
> Hi,
> I would like to propose a change that would make it possible for users to
> choose an implementation of IMetaStoreClient via HiveConf, i.e.
> hive-site.xml. Currently, in Hive the choice is hard coded to be
> SessionHiveMetaStoreClient in org.apache.hadoop.hive.ql.metadata.Hive. There
> is no other direct reference to SessionHiveMetaStoreClient other than the
> hard coded class name in Hive.java and the QL component operates only on the
> IMetaStoreClient interface so the change would be minimal and it would be
> quite similar to how an implementation of RawStore is specified and loaded in
> hive-metastore. One use case this change would serve would be one where a
> user wishes to use an implementation of this interface without the dependency
> on the Thrift server.
>
> Thank you,
> Austin
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