Re: Single transaction in the tablesync worker?

On Tue, Feb 9, 2021 at 10:38 AM Peter Smith <smithpb2250(at)gmail(dot)com> wrote:
>
> On Mon, Feb 8, 2021 at 11:42 AM Peter Smith <smithpb2250(at)gmail(dot)com> wrote:
> >
> > On Sun, Feb 7, 2021 at 2:38 PM Peter Smith <smithpb2250(at)gmail(dot)com> wrote:
> > >
> > > On Sat, Feb 6, 2021 at 2:10 AM Petr Jelinek
> > > <petr(dot)jelinek(at)enterprisedb(dot)com> wrote:
> > > >
> > > > Hi,
> > > >
> > > > Some minor comments about code:
> > > >
> > > > > + else if (res->status == WALRCV_ERROR && missing_ok)
> > > > > + {
> > > > > + /* WARNING. Error, but missing_ok = true. */
> > > > > + ereport(WARNING,
> > > >
> > > > I wonder if we need to add error code to the WalRcvExecResult and check
> > > > for the appropriate ones here. Because this can for example return error
> > > > because of timeout, not because slot is missing. Not sure if it matters
> > > > for current callers though (but then maybe don't call the param
> > > > missign_ok?).
> > >
> > > You are right. The way we are using this function has evolved beyond
> > > the original intention.
> > > Probably renaming the param to something like "error_ok" would be more
> > > appropriate now.
> > >
> >
> > PSA a patch (apply on top of V28) to change the misleading param name.
> >
>
> PSA an alternative patch. This one adds a new member to
> WalRcvExecResult and so is able to detect the "slot does not exist"
> error. This patch also applies on top of V28, if you want it.
>

PSA v2 of this WalRcvExceResult patch (it is same as v1 but includes
some PG doc updates).
This applies OK on top of v30 of the main patch.

------
Kind Regards,
Peter Smith.
Fujitsu Australia