Re: row filtering for logical replication

On Tue, Apr 12, 2022 at 11:31 AM houzj.fnst@fujitsu.com
<houzj.fnst@fujitsu.com> wrote:
>
> On Tuesday, April 12, 2022 8:40 AM Peter Smith <smithpb2250@gmail.com> wrote:
> >
> > FYI, I was playing with row filters and partitions recently, and while doing
> > something a bit unusual I received a cache leak warning.
> >
> > Below are the steps to reproduce it:
> >
> >
> > test_pub=# CREATE TABLE parent(a int primary key) PARTITION BY RANGE(a);
> > CREATE TABLE
> >
> > test_pub=# CREATE TABLE child PARTITION OF parent DEFAULT; CREATE TABLE
> >
> > test_pub=# CREATE PUBLICATION p4 FOR TABLE parent WHERE (a < 5), child
> > WHERE (a >= 5) WITH (publish_via_partition_root=true);
> > CREATE PUBLICATION
> >
> > test_pub=# ALTER PUBLICATION p4 SET TABLE parent, child WHERE (a >= 5);
> > ALTER PUBLICATION
> >
> > test_pub=# ALTER PUBLICATION p4 SET (publish_via_partition_root = false);
> > 2022-04-11 17:37:58.426 AEST [28152] WARNING:  cache reference leak:
> > cache pg_publication_rel (49), tuple 0/12 has count 1
> > WARNING:  cache reference leak: cache pg_publication_rel (49), tuple
> > 0/12 has count 1
> > ALTER PUBLICATION
>
> Thanks for reporting.
>
> I think the reason is that we didn't invoke ReleaseSysCache when rftuple is
> valid and no filter exists. We need to release the tuple whenever the
> rftuple is valid. Attach a patch which fix this.
>

Thanks! Your patch could be applied cleanly, and the reported problem
now seems fixed.

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