Re: psql 9.1 alpha5: connection pointer is NULL

Re: Tom Lane 2011-04-03 <1397.1301782258@sss.pgh.pa.us>
> Yeah, that's clearly a bug --- fix committed, thanks for the patch!
>
> It could explain Devrim's report if the parameters passed by psql had
> some problem that was detectable by conninfo_array_parse().  That seems
> a bit unlikely, but I did think of one possibility: if Devrim was
> testing 9.1 psql with a 9.0 libpq (perhaps due to an rpath issue)
> then 9.0 libpq would spit up on client_encoding, which wasn't a legal
> connection parameter in 9.0.

Hi,

I'm still seeing that problem: 9.1 HEAD compiled in my $HOME, with
Debian's 9.0.1-2 libpq5 in /usr/lib:
$ LC_ALL=C bin/psql
psql: connection pointer is NULL

Upgrading to libpq5 9.0.4-1 makes things a bit better:
$ LC_ALL=C bin/psql
psql: invalid connection option "client_encoding"

Setting LD_LIBRARY_PATH fixes it.

Arguably, this is not the "standard" setup, but one that will probably
be quite frequent for someone trying 9.1 in their ~. Shouldn't psql
try to work with older libpq versions by omitting client_encoding?
Setting an RPATH seems like an ugly solution. (I'm not arguing for a
SONAME bump, but this is kind of an ABI change.)

Christoph
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