Re: row filtering for logical replication

On Thu, Dec 2, 2021 at 2:32 PM tanghy.fnst@fujitsu.com
<tanghy.fnst@fujitsu.com> wrote:
>
> On Thursday, December 2, 2021 5:21 AM Peter Smith <smithpb2250@gmail.com> wrote:
> >
> > PSA the v44* set of patches.
> >
>
> Thanks for the new patch. Few comments:
>
> 1. This is an example in publication doc, but in fact it's not allowed. Should we
> change this example?
>
> +CREATE PUBLICATION active_departments FOR TABLE departments WHERE (active IS TRUE);
>
> postgres=# CREATE PUBLICATION active_departments FOR TABLE departments WHERE (active IS TRUE);
> ERROR:  invalid publication WHERE expression for relation "departments"
> HINT:  only simple expressions using columns, constants and immutable system functions are allowed
>

Thanks for finding this. Actually, the documentation looks correct to
me. The problem was the validation walker of patch 0002 was being
overly restrictive. It needed to also allow a BooleanTest node.

Now it works (locally) for me. For example.

test_pub=# create table departments(depno int primary key, active boolean);
CREATE TABLE
test_pub=# create publication pdept for table departments where
(active is true) with (publish="insert");
CREATE PUBLICATION
test_pub=# create publication pdept2 for table departments where
(active is false) with (publish="insert");
CREATE PUBLICATION

This fix will be available in v45*.

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