From: Dinesh Chandra 12108 <Dinesh.Chandra@cyient.com>
To: John Gorman <jgorman@eldocomp.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Cc: pgsql-performance-owner@postgresql.org <pgsql-performance-owner@postgresql.org>
Subject: Re: Auto generate number in Postgres-9.1.
Date: Mon, 20 Mar 2017 14:08:07 +0000
Message-ID: <d932f1ffb7b84318b96477f3cfc84e65@cyient.com> (raw)
In-Reply-To: <0A1B0B276DEE6441A2E68EB66D4540DAE6869132@winex2.eldocomp.com>
References: <ab77f3e1c16540a09002740e283529c5@cyient.com>
<97da050c-395c-7205-c5e9-95e7fdf13fde@berkus.org>
<0A1B0B276DEE6441A2E68EB66D4540DAE6869132@winex2.eldocomp.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-performance>
Hi,
Thanks for your immediate response!!!!
Its working fine when we insert a new row.
But on deletion it's not automatically re-adjusting the id's.
Do I need to create trigger for this??
Regards,
Dinesh Chandra
|Database administrator (Oracle/PostgreSQL)| Cyient Ltd. Noida.
-----Original Message-----
From: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of John Gorman
Sent: 20 March, 2017 7:20 PM
To: pgsql-performance@postgresql.org; pgsql-performance-owner@postgresql.org
Subject: Re: [PERFORM] Auto generate number in Postgres-9.1.
Sequences are stored as a separate object in PostgreSQL.
Here in this example table and you can see that rec_id is a sequence number and that the object name is: whiteboards_rec_id_seq
mydb=> \d whiteboards
Table "public.whiteboards"
Column | Type | Modifiers
---------------+-----------------------------+--------------------------
---------------+-----------------------------+--------------------------
---------------+-----------------------------+----------
rec_id | integer | not null default nextval('whiteboards_rec_id_seq'::regclass)
board_name | character varying(24) | not null
board_content | text | not null
updatets | timestamp without time zone | default now()
Indexes:
"whiteboards_pkey" PRIMARY KEY, btree (rec_id)
Now I can display the whiteboards_rec_id_seq object
mydb=> \dS whiteboards_rec_id_seq
Sequence "public.whiteboards_rec_id_seq"
Column | Type | Value
---------------+---------+------------------------
sequence_name | name | whiteboards_rec_id_seq
last_value | bigint | 12
start_value | bigint | 1
increment_by | bigint | 1
max_value | bigint | 9223372036854775807
min_value | bigint | 1
cache_value | bigint | 1
log_cnt | bigint | 31
is_cycled | boolean | f
is_called | boolean | t
-----Original Message-----
From: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Josh Berkus
Sent: Monday, March 20, 2017 6:43 AM
To: Dinesh Chandra 12108; pgsql-performance-owner@postgresql.org
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Auto generate number in Postgres-9.1.
Dinesh,
> I have to add one column "ID" in postgres table which will generate
> Auto Increment
> <http://www.davidghedini.com/pg/entry/postgresql_auto_increment>ed number .
>
>
>
> Example:
>
> Suppose I have five records and if I insert 1 new record It should
> auto generate 6.
https://www.postgresql.org/docs/9.6/static/sql-createsequence.html
also SERIAL on this page:
https://www.postgresql.org/docs/9.6/static/datatype-numeric.html>
> 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.
--
Josh Berkus
Containers & Databases Oh My!
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance
________________________________
DISCLAIMER:
This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. Check all attachments for viruses before opening them. All views or opinions presented in this e-mail are those of the author and may not reflect the opinion of Cyient or those of our affiliates.
--
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: Dinesh.Chandra@cyient.com, jgorman@eldocomp.com, pgsql-performance-owner@postgresql.org
Subject: Re: Auto generate number in Postgres-9.1.
In-Reply-To: <d932f1ffb7b84318b96477f3cfc84e65@cyient.com>
* 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