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

Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> writes:
>> New Patch v29: Now with less coverage!

> Patch applies cleanly. Make check ok. Feature still works!

I've been hacking on this for about two full days now, and have gotten
it to a point where I think it's committable. Aside from cosmetic
changes, I've made it behave reasonably for cases where \if is used
on portions of a query, for instance

SELECT
\if :something
var1
\else
var2
\endif
FROM table;

which as I mentioned a long time ago is something that people will
certainly expect to work. I also cleaned up a lot of corner-case
discrepancies between how much text is consumed in active-branch and
inactive-branch cases (OT_FILEPIPE is a particularly nasty case in that
regard :-()

I plan to read this over again tomorrow and then push it, if there are
not objections/corrections.

regards, tom lane