From: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
---|---|
To: | Winanjaya Amijoyo <winanjaya(dot)amijoyo(at)gmail(dot)com> |
Cc: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, pgsql-general <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Returning empty on insert |
Date: | 2019-05-16 14:47:49 |
Message-ID: | 4e9683e0-1333-98ce-0aea-9f591548a41d@aklaver.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
On 5/16/19 7:26 AM, Winanjaya Amijoyo wrote:
> and yes .. I need both inserted pid and updated pid
The INSERT pid is going to be 'swallowed' by the CTE that is why the:
SELECT pid FROM s UNION SELECT pid FROM i
Which also means the UPDATE RETURNING pid will be equal to it.
>
> On Thu, May 16, 2019 at 9:25 PM Winanjaya Amijoyo
> <winanjaya(dot)amijoyo(at)gmail(dot)com <mailto:winanjaya(dot)amijoyo(at)gmail(dot)com>> wrote:
>
> see enclosed screenshot..
>
> I thought, the record still locked that's why it returns empty..
>
> On Thu, May 16, 2019 at 9:21 PM Adrian Klaver
> <adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
>
> On 5/16/19 7:10 AM, Winanjaya Amijoyo wrote:
> > Hi David,
> >
> > thanks for your advise, as I am new with postgresql..
> > I try to use LOCK as below, but it does not returning pid?
> > what I missed?
>
> I'm not sure which pid you are referring to, the INSERT or
> UPDATE or both?
>
> Can you show the output of the query?
> >
> > BEGIN TRANSACTION;
> > LOCK TABLE test IN ACCESS EXCLUSIVE MODE;
> > WITH s AS (
> > SELECT pid FROM test WHERE area = 'test4'
> > ), i AS (
> > INSERT INTO test (area)
> > SELECT 'test4'
> > WHERE NOT EXISTS (SELECT 1 FROM s)
> > RETURNING pid
> > )
> > UPDATE area
> > SET last_update = CURRENT_TIMESTAMP
> > WHERE pid = (SELECT pid FROM s UNION SELECT pid FROM i)
> > RETURNING pid;
> > COMMIT TRANSACTION;
> >
> >
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com <mailto:adrian(dot)klaver(at)aklaver(dot)com>
>
--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com
From | Date | Subject | |
---|---|---|---|
Next Message | Winanjaya Amijoyo | 2019-05-16 14:48:16 | Re: Returning empty on insert |
Previous Message | Winanjaya Amijoyo | 2019-05-16 14:26:33 | Re: Returning empty on insert |