Project Summary
Apache Calcite is a framework for writing data management systems.
It converts queries, represented in relational algebra, into an efficient executable form using pluggable query transformation rules. There is an optional SQL parser and JDBC driver. Calcite does not store data or have a preferred execution engine. Data formats, execution algorithms, planning rules, operator types, metadata, and cost model are added at runtime as plugins.
It is a top-level project of the Apache Software Foundation.
In a Nutshell, Apache Calcite...
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has a well established, mature codebase
maintained by a very large development team
with increasing Y-O-Y commits -
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took an estimated 149 years of effort (COCOMO model)
starting with its first commit in May, 2012
ending with its most recent commit about 7 hours ago
Quick Reference
Apache License 2.0
Permitted
Commercial Use
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Private Use
Use Patent Claims
Forbidden
Hold Liable
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Required
Include Copyright
State Changes
Include License
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
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