The following companies and projects are powered by Apache Calcite.
Apache Apex uses Calcite for parsing streaming SQL and query optimization.
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 uses Calcite for cost-based query optimization.
Apache Kylin uses Calcite for SQL parsing and query optimization.
Apache Phoenix uses Calcite for SQL parsing and query optimization (under development), and also uses Avatica for its remote JDBC driver.
SamzaSQL, an extension to Apache Samza, uses Calcite for parsing streaming SQL and query optimization.
Apache Storm uses Calcite for parsing streaming SQL and query optimization.
Lingual component provides a SQL interface to Cascading.
Quark is a data virtualization engine over analytic databases. It uses Calcite to transparently rewrite queries to use materialized views.
SQL-Gremlin is a SQL interface to a Apache TinkerPop-enabled graph database.
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