From: Emi Lu <emilu@encs.concordia.ca>
To: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: CopyManager(In/out) vs. delete/insert directly
Date: Thu, 16 Oct 2014 14:30:54 -0400
Message-ID: <54400EDE.7030801@encs.concordia.ca> (raw)
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-performance>
Hello,
Two options for data (>1M), may I know which one better please?
(1) copyOut (JDBC copyManager)
t1 into a.csv
delete t2 where pk.cols in t1
copyIn t2 from a.csv
(2) setautoCommit(false);
delete t2 where pk.cols in t1;
insert t2 select * from t1;
Thank you
Emi
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: emilu@encs.concordia.ca
Subject: Re: CopyManager(In/out) vs. delete/insert directly
In-Reply-To: <54400EDE.7030801@encs.concordia.ca>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox