Обсуждение: Duplicate Key Violates Unique Contraint when Updating a table

Hi all,

I am experiencing thgis problem since this morning. I seldom heard about
unique key constraint violation to happen when updating a table.

It happens to 1 or few records at early stage, but then to all.

My updating command is as following:

update mytable set my_status='Y' where myid='ABC123567778';

Can anyone help? All helps and solutions are appreciated.

THanks.

CK

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On sun, 2007-06-24 at 16:55 +0800, carter ck wrote:
> I am experiencing thgis problem since this morning. I seldom heard about
> unique key constraint violation to happen when updating a table.
>
> It happens to 1 or few records at early stage, but then to all.
>
> My updating command is as following:
>
> update mytable set my_status='Y' where myid='ABC123567778';
>
> Can anyone help? All helps and solutions are appreciated.

sounds like you have a UNIQUE constraint involving the column
"my_status".

did you recently create a new index on this table?

what does psql say to:
\d mytable


gnari

Hi..

No. The only unique key is the myid, which is also the primary key. I have
extracted the records out from this database and dump all to a new database.
Everything is fine. But, this is the second time I have encountered this
problem.

Hopefully those who have solutions for this can kindly post a feedback.
THanks.


>From: Ragnar <gnari@hive.is>
>To: carter ck <carterck32@hotmail.com>
>CC: pgsql-general@postgresql.org
>Subject: Re: [GENERAL] Duplicate Key Violates Unique Contraint whenUpdating
>a table
>Date: Sun, 24 Jun 2007 10:05:16 +0000
>
>On sun, 2007-06-24 at 16:55 +0800, carter ck wrote:
> > I am experiencing thgis problem since this morning. I seldom heard about
> > unique key constraint violation to happen when updating a table.
> >
> > It happens to 1 or few records at early stage, but then to all.
> >
> > My updating command is as following:
> >
> > update mytable set my_status='Y' where myid='ABC123567778';
> >
> > Can anyone help? All helps and solutions are appreciated.
>
>sounds like you have a UNIQUE constraint involving the column
>"my_status".
>
>did you recently create a new index on this table?
>
>what does psql say to:
>\d mytable
>
>
>gnari
>
>

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On sun, 2007-06-24 at 17:58 +0800, carter ck wrote:
> >From: Ragnar <gnari@hive.is>
> >On sun, 2007-06-24 at 16:55 +0800, carter ck wrote:
> > > I am experiencing thgis problem since this morning. I seldom heard about
> > > unique key constraint violation to happen when updating a table.
> > >
> > > It happens to 1 or few records at early stage, but then to all.
> > >
> > > My updating command is as following:
> > >
> > > update mytable set my_status='Y' where myid='ABC123567778';
> > >
> > > Can anyone help? All helps and solutions are appreciated.
> >
> >sounds like you have a UNIQUE constraint involving the column
> >"my_status".
> >
> >did you recently create a new index on this table?
> >
> >what does psql say to:
> >\d mytable
> >

>
> No. The only unique key is the myid, which is also the primary key. I have
> extracted the records out from this database and dump all to a new database.
> Everything is fine. But, this is the second time I have encountered this
> problem.

do you still have the old database around?
if you do, does a
  REINDEX mytable;
make your problem go away?

gnari