Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.7.0
    • Component/s: None
    • Labels:
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      Description

      I've started work on an adapter for Apache Cassandra.

      There's still a fair bit of work to do, but you can successfully issue a fairly broad class of queries with filtering, sorting, and projections pushed down to Cassandra in many cases.

      Progress can be tracked on GitHub. Below is a brief list of things which still need to be done. I'm hoping this can be useful to others, so it would be good to get a sense of what would be considered complete for future release.

      To do

      • New tests for test suite (and update calcite-test-dataset to support Cassandra)
      • Allow for partial application of filter predicates (since Cassandra's query language is so limited, this will avoid the case where only trivial predicates can be pushed down)
      • Allow for partial sorting (for the same reason as above)
      • Proper quoting of identifiers
      • Fix projections to avoid projecting unnecessary columns in some circumstances
      • Proper cost modelling
      • Exploit native aggregation
      • Documentation
      • Correct literal formatting (e.g. dates, timestamps, etc.)

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              • Assignee:
                julianhyde Julian Hyde
                Reporter:
                michaelmior Michael Mior
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                • Created:
                  Updated:
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