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SQL on HBase

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SQL on HBase
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My Salesforce colleague and cubicle neighbor, James Taylor, just released
Phoenix
a SQL layer on top of HBase to the Open Source world.

Phoenix is implemented as a JDBC driver. It makes use of various HBase features such as coprocessors and filters to push predicates into the server as much as possible. Queries are parallelized across RegionServers.

Phoenix has a formal data model that includes making use of the row key structure for optimization.

Currently Phoenix is limited to single table operations.

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