Re: Duplicate Key Values

[mark bradley <markbradyju@xxxxxxxxxxx>]

Here is the table definition:

And here is the error message I get when I try to delete a duplicate:

Mark Brady, 

amazon.com/author/markjbrady

---

From: Adrian Klaver <adrian.klaver@xxxxxxxxxxx>
Sent: Wednesday, March 5, 2025 6:49 PM
To: Ron Johnson <ronljohnsonjr@xxxxxxxxx>; pgsql-general <pgsql-general@xxxxxxxxxxxxxx>
Subject: Re: Duplicate Key Values

 

On 3/5/25 15:37, Ron Johnson wrote:
> What does "and unique identifier" mean?
>
> (Creating a Primary Key constraint automatically creates a unique
> no-nulls-allowed index on the column(s), so no other index is needed.)
>
> Can you show the table definition?
>
> Anyway, you /should/ be able to delete one of the duplicate node_id
> records by specifying another column with a different value;
>
> On Wed, Mar 5, 2025 at 6:14 PM mark bradley <markbradyju@xxxxxxxxxxx
> <mailto:markbradyju@xxxxxxxxxxx>> wrote:
>
>     Hi Ron,
>
>     The key is an integer.  I'm using pGAdmin4 and recently updated to
>     the latest version.

1) Did you not see duplicates with the old version of pgAdmin4?

2) What do you see if you use psql?

3) Did you upgrade/move the Postgres server or the underlying OS?

4) Have you tried reindexing the node_id field?

>
>     The records are not all identical, some have NULL values of the
>     non-key for some unknown reason.  Here is a screenshot.  The key is
>     node_id, which I have specified as a key and unique identifier.
>
>
>


--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx