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.

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.oliver@gmail.com> wrote:

Wild. What's the use-case here?

 

On Wed, Aug 9, 2023 at 9:50 PM Wetmore, Matthew (CTR) <Matthew.Wetmore@express-scripts.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.dba09@gmail.com>
Sent: Wednesday, August 9, 2023 1:39 PM
To: pgsql-admin@lists.postgresql.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.oliver@gmail.com