Re: [PATCH] pg_isready (was: [WIP] pg_ping utility)

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Phil Sorber <phil(at)omniti(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <bruce(at)momjian(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Erik Rijkers <er(at)xs4all(dot)nl>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, Peter Eisentraut <peter_e(at)gmx(dot)net>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] pg_isready (was: [WIP] pg_ping utility)
Date: 2013-01-25 16:20:49
Message-ID: CAHGQGwFVUUMZFkQqrZYgUmFfa0-OzmHcfh32jCYk8femHz-rPg@mail.gmail.com
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On Fri, Jan 25, 2013 at 4:10 AM, Phil Sorber <phil(at)omniti(dot)com> wrote:
> On Thu, Jan 24, 2013 at 1:12 PM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>> set_pglocale_pgservice() should be called?
>>
>> I think that the command name (i.e., pg_isready) should be given to
>> PQpingParams() as fallback_application_name. Otherwise, the server
>> by default uses "unknown" as the application name of pg_isready.
>> It's undesirable.
>>
>> Why isn't the following message output only when invalid option is
>> specified?
>>
>> Try \"%s --help\" for more information.
>
> I've updated the patch to address these three issues. Attached.
>
>>
>> When the conninfo string including the hostname or port number is
>> specified in -d option, pg_isready displays the wrong information
>> as follows.
>>
>> $ pg_isready -d "port=9999"
>> /tmp:5432 - no response
>>
>
> This is what i asked about in my previous email about precedence of
> the parameters. I can parse that with PQconninfoParse, but what are
> the rules for merging both individual and conninfo params together?

If I read conninfo_array_parse() correctly, PQpingParams() prefer the
option which is set to its keyword array later.

Regards,

--
Fujii Masao

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