Re: [HACKERS] Logical Replication - test_decoding - unchanged-toast-datum
| От | Abhinav Singh |
|---|---|
| Тема | Re: [HACKERS] Logical Replication - test_decoding - unchanged-toast-datum |
| Дата | |
| Msg-id | CALm8xzj+124HEEGB6vowmwioCdrb=mUGVx-MONwd4KE+PZhT0w@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [HACKERS] Logical Replication - test_decoding - unchanged-toast-datum (Euler Taveira <euler@timbira.com.br>) |
| Список | pgsql-hackers |
Hello Euler,
Thank you very for your prompt response.
I am really very sorry that I didn't mention about my exact question. So as you can see from my previous email, in the replication slot I see the value 'unchanged-toast-datum' for the column of dataytpe 'character varying'.
Based on this, when I query my target PostgreSQL instance after the UPDATE statement is run, the value in this column gets changed to 'unchanged-toast-datum'. The steps that I gave is a simple reproduction and I would request you to please give that a try as well.
Hence, my question is how can workaroud this issue or is there a resolution for this problem.
Kindly review and please share your comments.
Thanks and Regards,
Abhinav Singh
On Tue, Sep 26, 2017 at 6:25 PM, Euler Taveira <euler@timbira.com.br> wrote:
2017-09-26 1:11 GMT-03:00 Abhinav Singh <abhinav.thegame@gmail.com>:
> 5. On the target, when I do a select * and see that the column with
> character varying() datatype has changed to 'unchanged-toast-datum'.
>
The column "is_toast" didn't change its value to
"unchanged-toast-datum". It is just a test_decoding convention that
means that the value is stored in a TOAST table and it was not
changed. test_decoding doesn't show TOAST values to avoid performance
problems and to be brief. Try a SELECT in the table and you will see
that the value is already there.
You didn't write an explicit question but I believe it was your doubt,
didn't it?
--
Euler Taveira Timbira -
http://www.timbira.com.br/
PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento
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