[ryandotsmith]

Interesting. Given that I primarily use PostgreSQL, I have not come across this feature in my day-to-day. However, I can imagine building such a thing in PostgreSQL. Perhaps with a system of triggers and dblink [1] one can create a mechanism to achieve a similar result.

1. http://www.postgresql.org/docs/9.1/static/dblink.html

[skMed]

CDC is definitely a more enterprise-y feature (Oracle, SQL Server, etc.). I have had to build the same sort of tracking via triggers in the past, so I would definitely agree with you. I am not super familiar with the PostgreSQL road map, but maybe it is a long-term goal.