Apache Calcite

Clone this repo:
  1. b4e399c [CALCITE-4414] RelMdSelectivity#getSelectivity for Calc can propagate a predicate with wrong references by rubenada · 8 days ago master
  2. fc912eb [CALCITE-4409] Improve exception when RelBuilder tries to create a field on a non-struct expression by rubenada · 9 days ago
  3. fbe6982 [CALCITE-4393] ExceptionInInitializerError due to NPE in SqlCallBinding caused by circular dependency by rubenada · 2 weeks ago
  4. 99251a5 [CALCITE-4251] Support Calc and SetOp operator in RelMdAllPredicates (Xu Zhaohui) by xzh · 7 months ago
  5. 3f0353c Following [CALCITE-4354], control field index access at runtime via feature flag (Alessandro Solimando) by Alessandro Solimando · 11 days ago

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Apache Calcite

Apache Calcite is a dynamic data management framework.

It contains many of the pieces that comprise a typical database management system but omits the storage primitives. It provides an industry standard SQL parser and validator, a customisable optimizer with pluggable rules and cost functions, logical and physical algebraic operators, various transformation algorithms from SQL to algebra (and the opposite), and many adapters for executing SQL queries over Cassandra, Druid, Elasticsearch, MongoDB, Kafka, and others, with minimal configuration.

For more details, see the home page.