Apache Calcite

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Apache Calcite
Apache Calcite Logo
Developer(s)Apache Software Foundation
Initial releaseJune 27, 2014; 4 years ago (2014-06-27)[1]
Stable release
1.17.0 / 20 July 2018 (2018-07-20)[2]
Repository Edit this at Wikidata
Written inJava
Operating systemCross-platform
TypeSQL database
LicenseApache License 2.0
Websitecalcite.apache.org

Apache Calcite is an open source framework for building databases and data management systems. It includes a SQL parser, an API for building expressions in relational algebra, and a query planning engine. As a framework, Calcite does not store its own data or metadata, but instead allows external data and metadata to be accessed by means of plug-ins.

Several other Apache projects use Calcite.[3] Hive uses Calcite for cost-based query optimization;[4] Drill and Kylin use Calcite for SQL parsing and optimization; Samza and Storm use Calcite for streaming SQL. As of August 2016, Apex, Phoenix and Flink have projects under development that use Calcite.

References[edit]

  1. ^ Julian Hyde. "Optiq-0.8 release announcement". Apache Software Foundation.
  2. ^ Vysotskyi, Volodymyr (20 July 2018). "Release 1.17.0". Retrieved 20 December 2018.
  3. ^ "Powered by Calcite". Apache Software Foundation.
  4. ^ Julian Hyde. "Cost-based query optimization in Apache Hive 0.14", Hortonworks, 24 September 2014.