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The following companies and projects are powered by Apache Calcite.

Companies and projects

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Apache Apex

Apache Apex uses Calcite for parsing streaming SQL and query optimization.

Apache Drill

Apache Drill uses Calcite for SQL parsing and query optimization.

Apache Flink uses Calcite for parsing both regular and streaming SQL, and for query optimization (under development).

Apache Hive

Apache Hive uses Calcite for cost-based query optimization.

Apache Kylin

Apache Kylin uses Calcite for SQL parsing and query optimization.

Apache Phoenix

Apache Phoenix uses Calcite for SQL parsing and query optimization (under development), and also uses Avatica for its remote JDBC driver.

Apache Samza

SamzaSQL, an extension to Apache Samza, uses Calcite for parsing streaming SQL and query optimization.

Apache Storm

Apache Storm uses Calcite for parsing streaming SQL and query optimization.

Cascading

Lingual component provides a SQL interface to Cascading.

MapD

MapD is GPU-powered database and visual analytics platform for interactive exploration of large datasets.

Qubole Quark

Quark is a data virtualization engine over analytic databases. It uses Calcite to transparently rewrite queries to use materialized views.

SQL-Gremlin

SQL-Gremlin is a SQL interface to a Apache TinkerPop-enabled graph database.