Here is the link to Elein's presentation: http://www.varlena.com/GeneralBits/Tidbits/tt.pdf > What [about] postgresql "time travel"? I have never used it, and it looks a > little bit unmaintained, but it might be perfect with some tweaking:
pgsql-general by date:
Соглашаюсь с условиями обработки персональных данных