What feature or improvement would you like to see?

Although most Adbc methods throws AdbcException, there are several places in ADBC interfaces where methods throws Exception (notably for close() methods) or IOException. Similar to JDBC API, all exceptions should be normalized around AdbcException to make API consistent.

It would be an incompatible API change though. When updating methods from Exception to AdbcException, this would be a source incompatible change but a binary compatible one. However when changing from IOException to AdbcException, it would be a source and binary incompatible change.