Felipe Santos schrieb am 30.04.2015 um 14:02:
> As of my understanding, if you are not embedding Postgresql in your solution and then selling it,
> you are not infringing any copyright by using Postgresql in your architecture, and so you are entitled
> to use it freely (A) and without having to share your source code (B).
Even if he _was_ selling a (close source) software that embedds Postgres, this woould be allowed by the Postgres license.
In a nutshell the Postgres license lets you do with it, whatever you want.