From: | Peter Geoghegan <peter(dot)geoghegan86(at)gmail(dot)com> |
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To: | Greg Sabino Mullane <greg(at)turnstep(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: querying the version of libpq |
Date: | 2010-10-05 15:52:28 |
Message-ID: | AANLkTinNsPfdJ+67cRQTvqrEEwGkEgH09T0A+ov86s_o@mail.gmail.com |
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Lists: | pgsql-general pgsql-hackers |
On 5 October 2010 16:33, Greg Sabino Mullane <greg(at)turnstep(dot)com> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: RIPEMD160
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>
>>> if ($dbh->{pg_lib_version} >= 90000) {
>>>
>>> I'd raise a bug with psycopg2 if it does not provide that information.
>>
>> How does the driver figure it out?
>
> DBD::Pg parses pg_config --version, then passes the information
> to the C programs for directive fiddling. I certainly hope
> other drivers are doing the same, as libpq varies across
> major versions a good deal.
I would imagine that most libpq wrapping drivers use libpq's
PQserverVersion(), which returns an integer that looks like 90000.
--
Regards,
Peter Geoghegan
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