To run federated queries, you simply need to define each data source in your model.json. You can see examples of model.json files for various adapters in the test code for those adapters.
For example: File - https://github.com/apache/calcite/blob/master/file/src/test/resources/model.json Cassandra - https://github.com/apache/calcite/blob/master/cassandra/src/test/resources/model.json You can add as many schemas as you want from different adapters into the "schemas" array in model.json and all those schemas will be available for you to write queries including joins across schemas. -- Michael Mior mm...@apache.org Le lun. 1 nov. 2021 à 15:38, Yogendra Sharma <s...@live.com> a écrit : > > Hi Team, > > I am exploring Apache Calcite to run federated queries on three different > databases. I could not find a working example anywhere on internet. > > Can you guys confirm if it is possible and if yes, is there an example that > you can point me to? > > Thanks, > Yogendra >
