| From: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, "wangw(dot)fnst(at)fujitsu(dot)com" <wangw(dot)fnst(at)fujitsu(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, "shiy(dot)fnst(at)fujitsu(dot)com" <shiy(dot)fnst(at)fujitsu(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Perform streaming logical transactions by background workers and parallel apply |
| Date: | 2022-10-20 03:18:46 |
| Message-ID: | CAFiTN-vOovtK2ENFqat8fUndhqvPeT+Latd2SKA3GmQitkQK3g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Oct 18, 2022 at 6:25 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > Interesting case. So I think the root of the problem is the same as
> > what we have for a column is marked unique to the subscriber but not
> > to the publisher. In short, two transactions which are independent of
> > each other on the publisher are dependent on each other on the
> > subscriber side because table definition is different on the
> > subscriber. So can't we handle this case in the same way by marking
> > this table unsafe for parallel-apply?
> >
>
> Yes, we can do that. I think Hou-San has already dealt that way in his
> latest patch [1]. See his response in the email [1]: "Disallow
> replicating from or to a partitioned table in parallel streaming
> mode".
>
> [1] - https://www.postgresql.org/message-id/OS0PR01MB57160760B34E1655718F4D1994249%40OS0PR01MB5716.jpnprd01.prod.outlook.com
Okay, somehow I missed the latest email. I will look into it soon.
--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com
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