@Dmitry and Mark Thank you for the explanation.
@Mark About posting questions on Firebird 3.0 - as long as it isn't final - is also clear to me. Thank you, but sometimes it's hard to understand for non-project-members to know where to post: As the firebird-devel mailinglist also get posts that belong in 'support' and the firebird website states 'Firebird-support (if you don't know where to ask, ask here!)', I thought this one is probably the best.
