Keep the suggestions cached after disconnection

**Is your feature request related to a problem? Please describe.**
The problem is the amount of times I have to reconnect just so my autocomplete works even though everything is already cached. I don't and should not need an active connection to show suggestions of table names of column names when I am typing. I don't mean sound ungrateful for all the time the contributors have spent, but this is a deliberate design decision, which makes absolutely no sense at all.

**Describe the solution you'd like**
Keep the suggestions cached instead of clearing them on disconnection!

**Describe alternatives you've considered**
Alternate is to keep a connection active at all times. Completely unnecessary and a waste of db connections.

**Additional context**
I have not any any other database client that doesn't keep the metadata cached. To me, this seems like the default state.