Re: pgbench - allow to store select results into variables

From: Rafia Sabih <rafia(dot)sabih(at)enterprisedb(dot)com>
To: Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>
Cc: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pgbench - allow to store select results into variables
Date: 2017-03-23 10:59:37
Message-ID: CAOGQiiNRbx8mnL-Aums3PMtxhtcKn0DuPmnvJNH1eLVQQ4Qy6Q@mail.gmail.com
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On Thu, Mar 16, 2017 at 12:45 AM, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> wrote:
>
> Hello Rafia,
>
>> I was reviewing v7 of this patch, to start with I found following white
>> space errors when applying with git apply,
>> /home/edb/Desktop/patches/others/pgbench-into-7.patch:66: trailing
>> whitespace.
>
>
> Yep.
>
> I do not know why "git apply" sometimes complains. All is fine for me both
> with "git apply" and "patch".
>
> Last time it was because my mailer uses text/x-diff for the mime type, as
> define by the system in "/etc/mime.types", which some mailer then interpret
> as a license to change eol-style when saving, resulting in this kind of
> behavior. Could you tell your mailer just to save the file as is?
>
>> Apart from that, on executing SELECT 1 AS a \gset \set i debug(:a) SELECT
>> 2
>> AS a \gcset SELECT 3; given in your provided script gset-1.sql. it is
>> giving error Invalid command \gcset.
>
>
> Are you sure that you are using the compiled pgbench, not a previously
> installed one?
>
> bin/pgbench> pgbench -t 1 -f SQL/gset-1.sql
> SQL/gset-1.sql:1: invalid command in command "gset"
> \gset
>
> bin/pgbench> ./pgbench -t 1 -f SQL/gset-1.sql
> starting vacuum...end.
> debug(script=0,command=2): int 1
> debug(script=0,command=4): int 2
> ...
>
>> Not sure what is the intention of this script anyway?
>
>
> The intention is to test that gset & gcset work as expected in various
> settings, especially with combined queries (\;) the right result must be
> extracted in the sequence.
>
>> Also, instead of so many different files for error why don't you combine
>> it into one.
>
>
> Because a pgbench scripts stops on the first error, and I wanted to test
> what happens with several kind of errors.
>
if (my_command->argc > 2)
+ syntax_error(source, lineno, my_command->line, my_command->argv[0],
+ "at most on argument expected", NULL, -1);

I suppose you mean 'one' argument here.
Apart from that indentation is not correct as per pgindent, please check.

--
Regards,
Rafia Sabih
EnterpriseDB: http://www.enterprisedb.com/

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