> Yes, I meant the hibernate dialect. I first thought part of the problem
> was the absence of mapping some java.sql.Types entries in the
> FirebirdDialect included in Hibernate, but it probably wasn't.

Well, i cannot check this, but if they really were missed and inheritance did not worked, then probably adding them would be good thing even if not required for XWiki compatibiltiy

PS. and i hope u make some notes, that could be published later for other Java programmers that had never before saw FB