Hello Daniel,
>> Ah, I see why *that* wants to know about it ... I think. I suppose you're
>> arguing that variable expansion shouldn't be able to insert, say, an \else
>> in a non-active branch? Maybe, but if it can insert an \else in an active
>> branch, then why not non-active too? Seems a bit inconsistent.
>
> Are we sold on the idea that conditionals should be implemented
> by meta-commands, rather than for example terminal symbols of
> a new grammar on top of the existing?
I would say that this already exists server-side, and it is named
PL/pgSQL:-)
I think that once psql has started with \xxx commands, then client-side
extensions must stick with it till the end of time.
--
Fabien.