From: Bruce Momjian <bruce@momjian.us>
To: colinthart@gmail.com
To: pgsql-docs@lists.postgresql.org
Subject: Re: COPY performance vs insert
Date: Tue, 17 Mar 2020 17:02:25 -0400
Message-ID: <20200317210225.GA17915@momjian.us> (raw)
In-Reply-To: <158149950563.1204.12282341954153208338@wrigleys.postgresql.org>
References: <158149950563.1204.12282341954153208338@wrigleys.postgresql.org>
On Wed, Feb 12, 2020 at 09:25:05AM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/12/populate.html
> Description:
>
> I think this could be clearer. In particular, performance of COPY vs INSERT
> from a query (INSERT INTO ... SELECT FROM ...) or INSERT with a list of rows
> (INSERT INTO ... VALUES (), (), (), ...)
> Is there any performance benefit with COPY in those cases?
COPY input/outputs rows in bulk, so it is still faster to do COPY than
INSERT INTO ... SELECT FROM or INSERT INTO ... VALUES. You can run
tests to prove it.
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Ancient Roman grave inscription +
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To: pgsql-docs@postgresql.org
Cc: bruce@momjian.us, colinthart@gmail.com, pgsql-docs@lists.postgresql.org
Subject: Re: COPY performance vs insert
In-Reply-To: <20200317210225.GA17915@momjian.us>
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