From: Achilleas Mantzios <achill@matrix.gatewaynet.com>
Organization: Dynacom Tankers Mgmt
To: pgsql-sql@postgresql.org
Subject: Re: Seeking quick way to clone a row, but give it a new pk.
Date: Thu, 8 Feb 2007 09:58:12 +0200
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=CE=A3=CF=84=CE=B9=CF=82 =CE=A0=CE=AD=CE=BC=CF=80=CF=84=CE=B7 08 =CE=A6=CE=
=B5=CE=B2=CF=81=CE=BF=CF=85=CE=AC=CF=81=CE=B9=CE=BF=CF=82 2007 09:19, =CE=
=BF/=CE=B7 Bryce Nesbitt =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5:
> Philip Hallstrom wrote:
> >> I need to create some nearly identical copies of rows in a complicated
> >> table.
> >>
> >> Is there a handy syntax that would let me copy a existing row, but get=
 a
> >> new primary key for the copy?  I'd then go in an edit the 1 or 2
> >> additional columns that differ.  The duplicate would be in the same
> >> table as the original.
> >>
> >> This would save me a bunch of typing.  Can it be done?
> >
> > INSERT INTO mytable SELECT * FROM mytable WHERE pk =3D 123;
> >
> > Or something close to that... I suspect if you changed the '*' to the
> > columns you wanted you could also work in the other columns you want
> > to change as well...
>
> But that will violate the unique primary key constraint:
>
> insert into xx_plan_rule select * from xx_plan_rule where rule_id=3D9;
> ERROR:  duplicate key violates unique constraint "xx_plan_rule_pkey"

If you have that requirement often i would recommend writing
a program taking the tablename,id as args, read DB metadata and act
accordingly.

=2D-=20
Achilleas Mantzios