Английская Википедия:Apache Calcite
Шаблон:Short description Шаблон:Infobox software 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.[1] Hive uses Calcite for cost-based query optimization;[2] Drill and Kylin use Calcite for SQL parsing and optimization; Samza and Storm use Calcite for streaming SQL. Шаблон:As of, Apex, Phoenix and Flink have projects under development that use Calcite.
References
Шаблон:Apache Software Foundation
- ↑ Шаблон:Cite web
- ↑ Julian Hyde. "Cost-based query optimization in Apache Hive 0.14", Hortonworks, 24 September 2014.
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