From: Tim Landscheidt <tim@tim-landscheidt.de>
To: pgsql-sql@postgresql.org
Subject: Re: Can i force deletion of dependent rows?
Date: Sat, 13 Feb 2010 07:05:59 +0000
Message-ID: <m3fx55linc.fsf@passepartout.tim-landscheidt.de> (raw)
References: <6caee9521002120424l27ec8d3eq3b69522d0a773686@mail.gmail.com>
<6caee9521002122211q7e4fd2fcj1a0489fd64dc204a@mail.gmail.com>
Shruthi A <shruthi.iisc@gmail.com> wrote:
> I have 2 tables (A and B) where the table B has a foreign key reference to
> table A. Like this:
> create table A (x int primary key);
> create table B (y int primary key, z int references A (x) );
> As you can see, i've not specified any further 'on delete' clause to the
> foreign key constraint like 'on delete cascade' or 'on delete restrict' or
> 'on delete set null' or 'on delete set default'. This means that the
> default behavior is followed ie 'on delete restrict' holds by default.
> Now I want to delete a particular row from table A. Is there any way I can
> force deletion of all the dependent rows in table B?
> Note that the tables have already been created in the above manner and
> populated. I want to do this deletion through DML only ie without any
> change in the table definition.
"DELETE FROM B WHERE z = 'your x';"?
Tim
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To: pgsql-sql@postgresql.org
Cc: tim@tim-landscheidt.de
Subject: Re: Can i force deletion of dependent rows?
In-Reply-To: <m3fx55linc.fsf@passepartout.tim-landscheidt.de>
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