To: pgsql-sql@postgresql.org
From: Thomas Kellerer <spam_eater@gmx.net>
Subject: Re: Function to total reset a schema
Date: Sun, 29 May 2011 09:54:41 +0200
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References: <4DE1F7DC.3080700@gmail.com>
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In-Reply-To: <4DE1F7DC.3080700@gmail.com>

Surfing wrote on 29.05.2011 09:38:
> Hi all,
> I need to write a function that totally empty a schema.
>
> So I have written a TRUNCATE statement for each table and set to 0 each sequence.
> Btw, it could be good to execute a vacuum statement on each table, but from within the function this is not allowed.
>
> Is there a way to obtain the same result in another way (without using the vacuum)?
>

If you are only using a single schema in your database, you could create an empty database with all your tables that you then use as the template database when creating a new one:

Then each time you want to reset your schema (=database) you do a

drop database real_database;
create database real_database template template_database;

Then you don't need to adjust your "reset" script if your database changes (you only maintain the template database using your SQL scripts)

Thomas