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Re: "DELETE FROM" protection

From: "Jeremy Smith" <jer(at)highboard(dot)com>
To: <pgsql-admin(at)postgresql(dot)org>
Subject: Re: "DELETE FROM" protection
Date: 2004-02-20 20:05:07
Message-ID: FKEOIJEHOIKIOEHCGNCLOEOPEDAA.jer@highboard.com (view raw or flat)
Thread:
Lists: pgsql-admin
Great point Bruce,

I hadn't really thought of the semi-colon as a safety mechanism, but I guess
it is.

Jeremy

-----Original Message-----
From: pgsql-admin-owner(at)postgresql(dot)org
[mailto:pgsql-admin-owner(at)postgresql(dot)org]On Behalf Of Bruce Momjian
Sent: Friday, February 20, 2004 1:27 PM
To: Yuji Shinozaki
Cc: Dave Ewart; pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] "DELETE FROM" protection


Yuji Shinozaki wrote:
>
> I've gotten myself into the habit of always writing out a
>
> 	SELECT ... FROM ... WHERE ...;
>
> first, and then command-line editing it to
>
> 	DELETE FROM ... WHERE ...;
>
> Putting it in a transaction (BEGIN, COMMIT or ROLLBACK) is probably the
> best practice.

I used to do this with Informix before a DELETE:

> 	SELECT COUNT(*) FROM ... WHERE ...;

               ^^^^^^^^
and Informix had that "Are your sure" check in dbaccess too, but after I
did the COUNT(*), the prompt was just annoying.

Also, what interfaces allow you to just press ENTER to send a command?
With psql, you have to terminate it with a semicolon or nothing happens.

I think there is justification for an "Are you sure" only if a single
keystroke sends the command.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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