Re: Postgres 9.4 + unixODBC on Centos 6.5 problem connecting localhost postgres instance with isql ODBC commandline client - SOLVED

"Stefan Viljoen" <viljoens(at)verishare(dot)co(dot)za> writes:
> I managed to solve this on Centos 6.5 by downgrading to Postgres 9.0 and
> ODBC is now working fine:

Hm. That should not have fixed anything, because there for sure have not
been any basic protocol-level changes since 9.0.

Looking back at your earlier messages, I notice that you are using
the Red Hat-supplied unixODBC package:

> # yum list installed | grep ODBC
>
> unixODBC.x86_64 2.2.14-14.el6 @base
> unixODBC-devel.x86_64 2.2.14-14.el6 @base

but the Postgres ODBC driver seems to be coming from PGDG:

> # yum list installed | grep postgres
>
> postgresql94.x86_64 9.4.4-1PGDG.rhel6
> postgresql94-contrib.x86_64
> postgresql94-devel.x86_64
> postgresql94-docs.x86_64
> postgresql94-libs.x86_64
> postgresql94-odbc.x86_64
> postgresql94-odbc-debuginfo.x86_64
> postgresql94-server.x86_64

An all-Red-Hat solution for this would look like

Installing:
postgresql-odbc x86_64 08.04.0200-1.el6 rhel-6-workstation-rpms 267 k
Installing for dependencies:
postgresql-libs x86_64 8.4.20-3.el6_6 rhel-6-workstation-rpms 202 k
unixODBC x86_64 2.2.14-14.el6 rhel-6-workstation-rpms 378 k

So now I'm suspicious that there's some incompatibility between the ODBC
driver that Devrim is shipping and the admittedly-pretty-old unixODBC
manager in RHEL6.

(I haven't worked for Red Hat in a couple of years, but I'm fairly sure
that when I left, their ODBC packages would still talk to current Postgres
server versions, because I recall testing that. However, I never tested
the combination of their unixODBC with the PGDG packaging of the ODBC
driver...)

regards, tom lane