> 1. For almost every error returned by jdbc, i get the message "No
> message for code 335544466" or something. Can i do something to
> have the specific message, like "Primary key violation" or
> something?

Can you provide a list of all missing error codes? File with messages
was auto-generated from Firebird message database, and these issues
should be fixed there.

> 2. How can i get the type of a record in the result set.

Using ResultSet.getType() method. Currently only
ResultSet.TYPE_FORWARD_ONLY is supported. Scrollable cursors will be
supported only in Firebird 1.5, and after its release we will
implement them in JayBird.

Best regards,
Roman Rokytskyy