Pierre Y. wrote:
Isn't isc_info_oldest_snapshot, isc_info_oldest_transaction and 
isc_info_oldest_active used with isc_database_info what you want?
    

I can be wrong but I saw that these numbers were different for each transaction. isc_info_oldest_snapshot & al give only the right information for the latest transaction.

  
May I ask why you need them and what you expect to do with them?