Hi! After changes to use commit number instead of base transaction number, I offer to make that interfaces for the feature:
SQL command: SET TRANSACTION SNAPSHOT COMMIT NUMBER <cn> (some variant as SNAPSHOT FROM COMMIT NUMBER or SNAPSHOT BASE COMMIT NUMBER may be acceptable) TPB: isc_tpb_snapshot_commit_number, <commit number length> <commit number> Adriano Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel