Expected Behavior

On Windows Original "KeePass" Variant you could make a link to another Keepass database file with
kdbx://C:\database.kbdx. If you double click that entry's URL it would open the database file. (Even is password protected, the password would come from the entry and would be passed in the openening process silently.
It also worked for password+keychain protection, but that didnt come right out of the box. (But I think I have the settings on my windows maschine still and could share it)

Current Behavior

This feature isnt implemented to my knowledge.

Context

With the implementation of this feature you could have seperated keepass database files for each customer in a company for instance. A "master" keepass file would be created with link entries to the customers keepass files. 1 entry = 1 customer = 1 keepass file.
If that keepass file is on an smb share for instance, it would be easy to revoke or give access to a keepass database file per user or per group. If you double click that entry and have ro/rw rights to that file, keepassxc will open that file (in a new window/tab of keepassxc).

Operating system: Mac OS High Sierra (other systems not checked)