> savepoint aname
>
> >then I do some other updates. Finally I do a rollback. What I want

is that

> >this rollback affects only the updates done since the bookmark.
>
> rollback to aname
>
> You can store multiple savepoints in a transaction.
>
> Available from Fb 1.5 forward. For full notes, see the Fb 1.5

release notes.

2nd that, read the release notes for full information.

One thing of note is that record locks acquired after the savepoint
declaration are not released during the rollback to savepoint
operation, and this behaviour may (or may not) change in subsequent
versions.

Adam