Date: Wed, 6 Nov 2019 22:42:30 -0500
From: Bruce Momjian <bruce@momjian.us>
To: turon.david@seznam.cz, pgsql-docs@lists.postgresql.org
Subject: Re: auto_explain.log_min_duration is limit for nested statement
Message-ID: <20191107034230.GC12478@momjian.us>
References: <157285150885.14272.17400824163768264403@wrigleys.postgresql.org>
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On Mon, Nov  4, 2019 at 07:11:48AM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
> 
> Page: https://www.postgresql.org/docs/12/auto-explain.html
> Description:
> 
> Hello,
> 
> I had problem with setup auto_explain.log_min_duration for COPY command on
> table with triggers. I set minimum duration to '2s' but no plan logged
> (duration of COPY command was above this limit). I thought that this
> extension not working with COPY command. After some testing I investigate
> that extension is working becouse duration limit is for nested statement
> (query in trigger) not for base statement (COPY) - it will be fine write
> somewere in documentation.

COPY doesn't go through the optimizer, so there is nothing to explain,
e.g.,

	test=> EXPLAIN COPY test FROM STDIN;
	ERROR:  syntax error at or near "COPY"
	LINE 1: EXPLAIN COPY test FROM STDIN;
	                ^

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +