On 6 October 2016 at 04:43, Serge Rielau <se...@rielau.com> wrote: >>> Or should I compose some sort of a design document?
Having read this thread, I'm a little unclear as to what you're writing now, though there's definitely good ideas here. I think it would be beneficial to write up a single coherent description of this, including behaviour and a small sketch of implementation, just so everyone knows what this is. No design doc, but a summary. It would be very useful to be able to do this... ALTER TABLE foo ADD last_updated_timestamp timestamp default current_timestamp so that it generates a constant value and stores that for all prior rows, but then generates a new value for future rows. Which makes me think we should call this missing_value or absent_value so its clear that it is not a "default" it is the value we use for rows that do not have any value stored for them. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers