I haven't used the derelict version but I have used the C library
itself and wrapped it briefly in my postgres.d here:
https://github.com/adamdruppe/arsd/blob/master/postgres.d
(implements an interface from database.d in the same repo)
I used very, very little of the library, but it is enough to get
basic results.
Your connection string can just be "dbname=NAME_HERE". Given your
command line, "dbname=testdb" would be the first one I try.
Here's the docs on those strings:
http://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-PARAMKEYWORDS
Your host and port are the default, so no need to list them. You
might need to set the user, but a better option there might be to
grant your regular user (whatever one you are logged into the
operating system as) permission to access the database, then the
default will work for that too.
The second class in my file shows how to get basic results.
string[] row;
for(int i = 0; i < numFields; i++) {
string a;
if(PQgetisnull(res, position, i))
a = null;
else {
a = to!string(PQgetvalue(res, position, i),
PQgetlength(res, position, i));
}
row ~= a;
}
gets it as an array of strings. This simple option loses the type
checking you can get from the database but it works for a lot of
stuff too.
