Re: Column Filtering in Logical Replication

On Fri, Dec 3, 2021 at 12:45 AM Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>
> On 2021-Sep-16, Peter Smith wrote:
>
> > I noticed that the latest v5 no longer includes the TAP test which was
> > in the v4 patch.
> >
> > (src/test/subscription/t/021_column_filter.pl)
> >
> > Was that omission deliberate?
>
> Somehow I not only failed to notice the omission, but also your email
> where you told us about it. I have since posted a version of the patch
> that again includes it.

Thanks for the patch, Few comments:
I had a look at the patch, I felt the following should be handled:
1) Dump changes to include the column filters while adding table to
publication in dumpPublicationTable
2) Documentation changes for column filtering in create_publication.sgml
3) describe publication changes to support \dRp command in describePublications
4) I felt we need not allow specifying columns in case of "alter
publication drop table" as currently dropping column filter is not
allowed.
5) We should check if the column specified is present in the table,
currently we are able to specify non existent column for column
filtering
+ foreach(lc, targetrel->columns)
+ {
+ char *colname;
+
+ colname = strVal(lfirst(lc));
+ target_cols = lappend(target_cols, colname);
+ }
+ check_publication_add_relation(targetrel->relation, target_cols);

Regards,
Vignesh