>> Last already commited transaction CN. OK
>> SNAPSHOT_NUMBER What it mean, is it from current transaction point of view first snapshot, last snapshot transaction what it is? Can you explain value based on below points? 1. Start transaction 1 snapshot 2. Commit transaction 1 3. Start transaction 2 snapshot 4. Start transaction 3 snapshot 5. Start transaction 4 read commited >> See RDB$GET_TRANSACTION_CN, described at >> doc/sql.extensions/README.builtin_functions.txt Super 😊 Regards, Karol Bieniaszewski
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