[support] Unable to connect to Postgres via UNIX domain socket

[Bill Moran]

I don't know if MySQL had the equivalent to this, but with PostgreSQL,
you can connect to a unix domain socket instead of TCP/localhost.  This
has the advantage of being faster because it doesn't have the overhead
of TCP.

It doesn't seem as if Drupal's connection scheme is capable of supporting
this.  Using raw pg_connect() in php, the connection would be established
thusly:

pg_connect('user=drupal dbname=drupal host=/tmp');

Optionally, the host= could be omitted entirely, and the PG drivers will
default to connecting to the local socket in /tmp.

if I tweak the following:
$db_url = 'pgsql://drupal@/tmp/drupal';

It doesn't work.  I assume the url decoding is barfing on that.  Leaving
out the host name causes a similar error.

Is this possible?  I suppose it's not the end of the world if it's
not, but I thought I'd ask.

-- 
Bill Moran
http://www.potentialtech.com