One question : Is it possible to observe editing history of descriptiong of one column? For exmaple, db is updated to description 'A' at 00:00. user1 changes it to 'B' at 01:30. user2 changes it to 'C' at 05:00. Then, what I can observe from ui after next update is : description is 'C' and original : 'A'. What I wonder is to track all changing history : not only changing 'C' but alsoo changing 'B' at 01:30 is expected to be observed in ui. Does datahub provide this now?

Not currently there isn't. There is a timeline API to get this information. But it is not surfaced in the UI yet

That is correct - What use case are you hoping to unlock with this?

+1! We’d love a feature request --> https://feature-requests.datahubproject.io/