2.4.1 - 2026-09-15

Summary

This patch release improves WebSocket DB-API error handling by passing through the original PyExasol error messages and making the exception classification more specific. Connection and communication failures are reported as OperationalError, while cursor or connection lifecycle misuse is reported as InterfaceError. These exceptions remain compatible with existing handlers that catch their common Error base class.

It also tightens DSN parsing: the optional TLS fingerprint must appear before the optional port, using the form hostname[/fingerprint][:port] (for example, localhost/1234:8563). A DSN using the reversed form, such as localhost:8563/1234, is now rejected with a DSN parsing error instead of silently treating the fingerprint as part of the hostname.

Bugfixes

• #360: Switched exasol.driver to adhere to the DBAPI per PEP-249 and pass on messages

• #237: Fixed the DSN parser accepting a fingerprint placed after the port (e.g. localhost:8563/1234) as part of the hostname