Re: [HACKERS] Allowing nonzero return codes from \quit

\quit 4

As \q does not currently have an argument, this seems an easy and reasonnable extension.

However, currently there are 4 existing exit status for psql: 0 (ok), 1 (fatal error), 2 (connection error), 3 (script error...). +128 status are also already used when killing a psql process.

ISTM that quitting with a status should not interfere with these cases at least, because a shell could not rely on the exit status to know what went wrong? Now having \q 1/2/3 forbidden would also be a strange behavior...

\set exit_code 127
\quit :exit_code

This isn't a personal need of mine, but I figured it was an idea worth
discussing on its own.

\quit exit_code is better - if we define some special variable, then we
have to specify when it should be used and when not. Taking value from
command is clean without any another questions.

With minimal luck the second form would probably work out of box if "\quit <int>" is implemented because of the way variable substitutions are performed.