From: Andreas Karlsson <andreas@proxel.se>
To: Josh Berkus <josh@berkus.org>
To: Dinesh Chandra 12108 <Dinesh.Chandra@cyient.com>
To: pgsql-performance-owner@postgresql.org <pgsql-performance-owner@postgresql.org>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Auto generate number in Postgres-9.1.
Date: Mon, 20 Mar 2017 14:48:23 +0100
Message-ID: <84f4e415-02ef-b22b-8a3e-6d95b66b660b@proxel.se> (raw)
In-Reply-To: <97da050c-395c-7205-c5e9-95e7fdf13fde@berkus.org>
References: <ab77f3e1c16540a09002740e283529c5@cyient.com>
<97da050c-395c-7205-c5e9-95e7fdf13fde@berkus.org>
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On 03/20/2017 02:43 PM, Josh Berkus wrote:
>> If I truncate the same table and then again insert rows should start
>> with 1 in “ID” column.
>
> That's not how it works, normally. I'd suggest adding an ON TRUNCATE
> trigger to the table.
Actually that may not be necessary as long as you make sure to use the
RESTART IDENTITY option when running TRUNCATE. I would argue that is a
cleaner solution than using triggers, if you can get away with it.
https://www.postgresql.org/docs/9.6/static/sql-truncate.html
Andreas
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Cc: andreas@proxel.se, josh@berkus.org, Dinesh.Chandra@cyient.com, pgsql-performance-owner@postgresql.org
Subject: Re: Auto generate number in Postgres-9.1.
In-Reply-To: <84f4e415-02ef-b22b-8a3e-6d95b66b660b@proxel.se>
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