Re: \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless)

On Wed, Feb 1, 2017 at 4:58 PM, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> wrote:

> I think the issue here is that the original case for this is a user
> accidentally getting into an \if and then having no clue what's going on.
> That's similar to what happens when you miss a quote or a semicolon. We
> handle those cases with %R, and I think %R needs to support if as well.
>
> Perhaps there's value to providing more info (active branch, etc), but
> ISTM trying to do that will just confuse the original (%R) case.
>

Jim,

After spending a few minutes to familiarize myself with %R, I'm in
agreement with your second statement (adding if-else to %R will just
confuse %R). However, your first statement seems to indicate the opposite.
Can you elaborate?

All,
As it is, I've added interactive mode psql_error notifications about the
resulting branching state of any branching commands, and any attempt to
send non-branching commands or queries while in an inactive branch will
generate a psql_error saying that the command was ignored. Waiting til I
get what should or shouldn't be done about prompts before issuing the next
patch revision.