COPY performance vs insert
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?
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 +