Re: Conflict detection and logging in logical replication

On Mon, Aug 19, 2024 at 9:07 AM shveta malik <shveta.malik@gmail.com> wrote:
>
> On Sun, Aug 18, 2024 at 2:27 PM Zhijie Hou (Fujitsu)
> <houzj.fnst@fujitsu.com> wrote:
> >
> > Attach the V16 patch which addressed the comments we agreed on.
> > I will add a doc patch to explain the log format after the 0001 is RFC.
> >
>
> Thank You for addressing comments. Please see this scenario:
>
> create table tab1(pk int primary key, val1 int unique, val2 int);
>
> pub: insert into tab1 values(1,1,1);
> sub: insert into tab1 values(2,2,3);
> pub: update tab1 set val1=2 where pk=1;
>
> Wrong 'replica identity' column logged? shouldn't it be pk?
>
> ERROR:  conflict detected on relation "public.tab1": conflict=update_exists
> DETAIL:  Key already exists in unique index "tab1_val1_key", modified
> locally in transaction 801 at 2024-08-19 08:50:47.974815+05:30.
> Key (val1)=(2); existing local tuple (2, 2, 3); remote tuple (1, 2,
> 1); replica identity (val1)=(1).

Apart from this one, I have no further comments on v16.

thanks
Shveta