The various exit status codes from `prqlc` about prql HOT 2 CLOSED

The main thing I think we could improve is the display of errors in the playground that don't have spans.

For example, in "Input contains only a comment", we could still show the red box that we normally show with the error message at the bottom. That could be a nice PR on the playground

I'm open to other ways in the UI of showing the query isn't current, but we do want to retain a view of the most recently valid query, otherwise typing a query is going to be like being in an arcade game, as the query flashes between being valid and invalid.

Panics could also be formatted like this, but also we should just try and never panic (current discussion at #4037 (comment))

(There's a question of whether an empty query should be an error, I'm not sure, plausibly it should be OK but no strong view)

I don't see anything wrong about the prqlc CLI exit codes, is there? All the errors return an exit code of 1.

from prql.

These are all good points. I don't have any specific recommendations, I simply wanted to document all that I found when horsing around. I'll close this for now.

from prql.