From: | Michael Paquier <michael(at)paquier(dot)xyz> |
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To: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> |
Cc: | torikoshia <torikoshia(at)oss(dot)nttdata(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, jian(dot)universality(at)gmail(dot)com, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
Subject: | Re: Add new error_action COPY ON_ERROR "log" |
Date: | 2024-03-07 04:00:12 |
Message-ID: | Zek7zNLvpnQDSbg2@paquier.xyz |
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Lists: | pgsql-hackers |
On Wed, Mar 06, 2024 at 07:32:28PM +0530, Bharath Rupireddy wrote:
> Please see the attached v4 patch. If it looks good, I can pull
> LOG_VERBOSITY changes out into 0001 and with 0002 containing the
> detailed messages for discarded rows.
The approach looks sensible seen from here.
+ LOG_VERBOSITY [ <replaceable class="parameter">boolean</replaceable> ]
[...]
+ <term><literal>LOG_VERBOSITY</literal></term>
+ <listitem>
+ <para>
+ Sets the verbosity of logged messages by <command>COPY</command>
+ command. As an example, see its usage for
+ <command>COPY FROM</command> command's <literal>ON_ERROR</literal>
+ clause with <literal>ignore</literal> option.
+ </para>
+ </listitem>
Is a boolean the best interface for the end-user, though? Maybe
something like a "mode" value would speak more than a yes/no from the
start, say a "default" mode to emit only the last LOG and a "verbose"
for the whole set in the case of ON_ERROR? That could use an enum
from the start internally, but that's an implementation detail.
Describing what gets logged in the paragraph of ON_ERROR sounds fine,
especially if in the future more logs are added depending on other
options. That's an assumption at this stage, of course.
I am adding Alexander Korotkov in CC, as the original committer of
9e2d8701194f, as I assume that he may want to chime in this
discussion.
Torikoshi-san or others, if you have any comments about the interface,
feel free.
--
Michael
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