Normally I use Dbeaver for windows and always export my result set like this:
Is there a reason you couldn't select your results and right click and choose Advanced Copy -> Advanced Copy? I'm on a Mac and this is how I always copy results to the clipboard for pasting.
The problem was the box "open new connection" that was checked. So I couldn't use my temporary table.
You don't need to use the clipboard, you can export directly the whole resultset (not just what you see) to a file :
The export runs in the background, a popup will appear when it's done.
In newer versions of DBeaver you can just :
The export runs in the background, a popup will appear when it's done.
Compared to the previous way of doing exports, this saves you step 1 (executing the query) which can be handy with time/resource intensive queries.