Automate to rename table

A partitioned table with less than 500M rows will suffer from performance issues. Just my $0.02

From: Holger Jakobs <holger(at)jakobs(dot)com>
Sent: Thursday, August 10, 2023 3:12 AM
To: pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: [EXTERNAL] Re: Automate to rename table

Creating a partitioned table with a partition by month would be the way to go. Then drop the tables you no longer need. This can be done in a cron job or by using pg_agent, pg_cron or pg_timetable.

Am 10. August 2023 11:52:37 MESZ schrieb Rajesh Kumar <rajeshkumar(dot)dba09(at)gmail(dot)com<mailto:rajeshkumar(dot)dba09(at)gmail(dot)com>>:
I have a table A where datas are coming in...and as it gets old (say 30 days), we would not want this on same table and wants it in another table 30days old (A_old) and any new request will be in A table.

So, what we are already doing is, created a function to create a table A if not exists , then we are renaming the table A to A_old manually. And when we execute that function it create a new table A so that new data gets inserted. Then after 60 days we drop drop A_old table. Which means we need 30 days data in new table, 30 days data in old table and remaining we don't need it.

How do we automate it?

I am thinking of partioning, but unsure whether it's a complex process ..also don't have date column.

Can we simply create a function to alter table A rename to A_old , and schedule to execute this function every 30 days?

What's the best way?

On Thu, 10 Aug, 2023, 2:34 PM Wells Oliver, <wells(dot)oliver(at)gmail(dot)com<mailto:wells(dot)oliver(at)gmail(dot)com>> wrote:
Wild. What's the use-case here?

On Wed, Aug 9, 2023 at 9:50 PM Wetmore, Matthew (CTR) <Matthew(dot)Wetmore(at)express-scripts(dot)com<mailto:Matthew(dot)Wetmore(at)express-scripts(dot)com>> wrote:
Simple CRON entry with a script that runs a psql command

You can:

alter table rename
Or
create table x as select * from original table.

Depending on you DDL needs or permissions/setup

From: Rajesh Kumar <rajeshkumar(dot)dba09(at)gmail(dot)com<mailto:rajeshkumar(dot)dba09(at)gmail(dot)com>>
Sent: Wednesday, August 9, 2023 1:39 PM
To: pgsql-admin(at)lists(dot)postgresql(dot)org<mailto:pgsql-admin(at)lists(dot)postgresql(dot)org>
Subject: [EXTERNAL] Automate to rename table

Hi friends,

What is the best way to rename the table name automatically every 30 minutes?

--
Wells Oliver
wells(dot)oliver(at)gmail(dot)com<mailto:wellsoliver(at)gmail(dot)com>