Re: Error editing table WITH primary key

Sorry - my bad.  Here is the postgresql definition of a PRIMARY-KEY:

The PRIMARY KEY column constraint specifies that a column of a table may
contain only unique (non-duplicate), non-NULL values. The definition of
the specified column does not have to include an explicit NOT NULL
constraint to be included in a PRIMARY KEY constraint.

Sue

-----Original Message-----
From: Raymond O'Donnell [mailto:rod@iol.ie]
Sent: Friday, January 16, 2009 4:17 PM
To: Thornton, Susan M. (LARC-B702)[NCI INFORMATION SYSTEMS]
Cc: Terry Yapt; pgadmin-support@postgresql.org
Subject: Re: [pgadmin-support] Error editing table WITH primary key

On 16/01/2009 18:56, Thornton, Susan M. (LARC-B702)[NCI INFORMATION
SYSTEMS] wrote:
>      Is your primary key defined as "Unique"?  If this is the case,
you
> may be trying to add a value for the key that already exists.  Or it
may

Is a primary key not unique by definition? - doesn't the primary key
uniquely identify a row in a table?

Ray.


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Raymond O'Donnell, Director of Music, Galway Cathedral, Ireland
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