Initial commit

.gitignore

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+/target/
+
+# Eclipse and Maven
+.classpath
+.project
+.settings
+target
+.cache
+
+# Intellij
+.idea
+# Intellij recommends to share iml files, however, better don't share files which might be outdated
+*.iml
+

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2016 EXASOL AG
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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-# virtual-schemas
+# Virtual Schemas
+
+Virtual schemas provide a powerful abstraction to conveniently access arbitrary data sources. Virtual schemas are a kind of read-only link to an external source and contain virtual tables which look like regular tables except that the actual data are not stored locally.
+
+After creating a virtual schema, its included tables can be used in SQL queries and even combined with persistent tables stored directly in EXASOL, or with other virtual tables from other virtual schemas. The SQL optimizer internally translates the virtual objects into connections to the underlying systems and implicitly transfers the necessary data. SQL conditions are tried to be pushed down to the data sources to ensure minimal data transfer and optimal performance.
+
+That's why this concept creates a kind of logical view on top of several data sources which could be databases or other data services. By that, you can either implement a harmonized access layer for your reporting tools. Or you can use this technology for agile and flexible ETL processing, since you don't need to change anything in EXASOL if you change or extend the objects in the underlying system.
+
+Please note that virtual schemas are part of the Advanced Edition of EXASOL.
+
+For further details about the concept, usage and examples, please see the corresponding chapter in our EXASOL User Manual.
+
+
+## API Specification
+
+The subdirectory [doc](doc) contains the API specification for virtual schema adapters.
+
+
+## JDBC Adapter
+
+The subdirectory [jdbc-adapter](jdbc-adapter) contains the JDBC adapter which allows to integrate any kind of JDBC data source which provides a Linux JDBC driver.
+
+## Python Redis Demo Adapter
+
+The subdirectory [python-redis-demo-adapter](python-redis-demo-adapter) contains a demo adapter for Redis writting in Python. This adapter was created to easily demonstrate the key concepts in a real, but very simple implementation. If you want to write your own adapter, this might be the right code to get a first impression what you'll have to develop.