Jdbc database connection for SIC

As others said, OneStream is built on the Microsoft DotNet runtime, so you can't just drop a JDBC driver on it.

This said, most datasources that "support JDBC" have an equivalent ODBC driver for Windows, which will work in a similar way and would be accessible by OneStream once installed. After all, JDBC is effectively a clone of ODBC, meant for the Java world...

For the most obscure systems that really only provide a JDBC driver, one can use bridging solutions like the ones listed in https://stackoverflow.com/questions/44703240/net-core-options-to-connect-to-jdbc-driver.

In both cases, if you're a Cloud customer you'll have to engage Support once you know exactly what datasource it is.