1. NOTICE
As stated, the work of the LeanXcale Query Engine forked from Apache Calcite. For the drivers, Apache Avatica framework is also used:
Apache Calcite Copyright 2012-2019 The Apache Software Foundation This product includes software developed at The Apache Software Foundation (http://www.apache.org/). This product is based on source code originally developed by DynamoBI Corporation, LucidEra Inc., SQLstream Inc. and others under the auspices of the Eigenbase Foundation and released as the LucidDB project. The web site includes files generated by Jekyll.
Apache Calcite -- Avatica Copyright 2012-2019 The Apache Software Foundation This product includes software developed at The Apache Software Foundation (http://www.apache.org/).
Geohash coding is based on https://github.com/kungfoo/geohash-java with the following license file:
Copyright 2016 Silvio Heuberger and contributors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
LeanXcale system uses spread as communication bus under the following license:
Version 1.0 June 26, 2001 Copyright (c) 1993-2016 Spread Concepts LLC. All rights reserved. This product uses software developed by Spread Concepts LLC for use in the Spread toolkit. For more information about Spread, see http://www.spread.org