| From: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
|---|---|
| To: | Noah Misch <noah(at)leadboat(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Euler Taveira <euler(at)eulerto(dot)com>, "osumi(dot)takamichi(at)fujitsu(dot)com" <osumi(dot)takamichi(at)fujitsu(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Alexey Lesovsky <lesovsky(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Skipping logical replication transactions on subscriber side |
| Date: | 2022-04-18 01:45:50 |
| Message-ID: | CAD21AoAhkEFGeHK-_65zsTn1NefVR63W2wjVrSjHgLw10uHqTA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Apr 15, 2022 at 4:26 PM Noah Misch <noah(at)leadboat(dot)com> wrote:
>
> On Thu, Apr 07, 2022 at 08:39:58PM +0900, Masahiko Sawada wrote:
> > On Thu, Apr 7, 2022 at 7:28 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > > On Thu, Apr 7, 2022 at 8:25 AM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > > > I'll take care of this today. I think we can mark the new function
> > > > get_column_offset() being introduced by this patch as parallel safe.
> > >
> > > Pushed.
> >
> > Thanks!
>
> I took a closer look at the test case. The "get_column_offset(coltypes) % 8"
> part would have caught the problem only when run on an ALIGNOF_DOUBLE==4
> platform. Instead of testing the start of the typalign='d' column, let's test
> the first offset beyond the previous column. The difference between those two
> values depends on ALIGNOF_DOUBLE.
Yes, but it could be false positives in some cases. For instance, the
column {oid, bool, XLogRecPtr} should be okay on ALIGNOF_DOUBLE == 4
and 8 platforms but the new test fails.
Regards,
--
Masahiko Sawada
EDB: https://www.enterprisedb.com/
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