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help / color / mirror / Atom feedFrom: Adrian Klaver <[email protected]>
To: mark bradley <[email protected]>
To: Ron Johnson <[email protected]>
To: pgsql-general <[email protected]>
Subject: Re: Duplicate Key Values
Date: Thu, 13 Mar 2025 09:05:37 -0700
Message-ID: <[email protected]> (raw)
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On 3/13/25 08:56, mark bradley wrote:
> >Postgresql does not assume / default to inheritance. In text-mode
> clients where you type >in "raw" SQL, you have to explicitly add an
> explicit "INHERITS <parent_table>" clause to the >"CREATE TABLE foo"
> statement.
>
> >Are you creating the tables via PgAdmin point-and-click?
>
> I am using PgAdmin 4 v9.1.
>
> I think the problem may also be related to the fact that I had
> *node_id* and *node_type *were in both tables from an earlier design and
> Postgres would not let me delete* node_type* from the* dataset* table.
Because it was inherited:
create table node (node_id integer primary key, fld1 varchar);
create table node_1 (node_id integer primary key, node_1_fld boolean)
inherits ( node);
alter table node_1 drop column fld1;
ERROR: cannot drop inherited column "fld1"
>
> As an experiment, I created a simple version of the same tables from
> scratch without *node_type* in the *dataset* table. So far, no dups are
> appearing.
I'm assuming that by 'simple version' you mean no inheritance.
>
> Best regards,
> Mark Brady
> _amazon.com/author/markjbrady <https://amazon.com/author/markjbrady>_
> ------------------------------------------------------------------------
--
Adrian Klaver
[email protected]
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