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https://issues.apache.org/jira/browse/HIVE-14870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15537299#comment-15537299
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Alan Gates commented on HIVE-14870:
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I agree it's a pain having per db implementations. But having one
implementation to rule them all makes it hard to write optimized SQL, and
things like isolation levels and error handling become nightmares (all speaking
from experience based on the ACID direct SQL). Do you think it would be
possible to write a cross-db direct SQL layer that didn't end up re-creating
data nucleus? Based on ACID I convinced myself it was not.
> OracleStore: RawStore implementation optimized for Oracle
> ---------------------------------------------------------
>
> Key: HIVE-14870
> URL: https://issues.apache.org/jira/browse/HIVE-14870
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Chris Drome
> Assignee: Chris Drome
> Attachments: OracleStoreDesignProposal.pdf
>
>
> The attached document is a proposal for a RawStore implementation which is
> optimized for Oracle and replaces DataNucleus. The document outlines schema
> changes, OracleStore implementation details, and performance tests against
> ObjectStore, ObjectStore+DirectSQL, and OracleStore.
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