[JohnDoe365]

I miss bi-temporal queries/support most. Unfortunately there is little in place as of now in that regard. http://www.postgresql.org/docs/9.5/static/runtime-config-rep... are the humble beginnings.

[kelvich]

It is now under development by Enova. They want to prototype bi-temporal support as an extension. https://hdombrovskaya.wordpress.com/2016/03/15/my-presentati...

While I was listening this presentation I've thought that it's quite weird functionality and intersects a lot with transaction visibility rules that MVCC already has. So it is interesting what is your use case?

[JohnDoe365]

Analysing open data portals. PG holds status data on retrievability of links. Depicting the evolvement of such an open data portal over time is possible with custom datetime columns and window fucntions, it's just tedious and error prone.