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Before proceeding, please read Hive- StorageHandlers for an overview of the generic storage handler framework on which HBase integration depends.
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- more flexible column mapping (HIVE-806, HIVE-1245)
- default column mapping in cases where no mapping spec is given
- filter pushdown and indexing (see Hive- FilterPushdownDev and Hive- IndexDev)
- expose timestamp attribute, possibly also with support for treating it as a partition key
- allow per-table hbase.master configuration
- run profiler and minimize any per-row overhead in column mapping
- user defined routines for lookups and data loads via HBase client API (HIVE-758 and HIVE-791)
- logging is very noisy, with a lot of spurious exceptions; investigate these and either fix their cause or squelch them
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