Re: Include schema-qualified names in publication error messages.

On Wed, 29 Apr 2026 at 18:02, Dilip Kumar <dilipbalaut@gmail.com> wrote:
>
> On Wed, Apr 29, 2026 at 5:02 PM shveta malik <shveta.malik@gmail.com> wrote:
> >
> > On Wed, Apr 29, 2026 at 4:41 PM Dilip Kumar <dilipbalaut@gmail.com> wrote:
> > >
> > > On Wed, Apr 29, 2026 at 4:08 PM Dilip Kumar <dilipbalaut@gmail.com> wrote:
> > > >
> > > > On Wed, Apr 29, 2026 at 9:28 AM Peter Smith <smithpb2250@gmail.com> wrote:
> > > > >
> > > > > On Tue, Apr 28, 2026 at 9:39 PM shveta malik <shveta.malik@gmail.com> wrote:
> > > > > >
> > > > > > On Tue, Apr 28, 2026 at 4:34 PM Dilip Kumar <dilipbalaut@gmail.com> wrote:
> > > > > > >
> > > > > > > Previously, error messages in check_publication_add_relation() only
> > > > > > > reported the relation name when a table could not be added to a
> > > > > > > publication or included in an EXCEPT clause. This could be ambiguous
> > > > > > > in databases where the same relation name exists in multiple schemas.
> > > > > > >
> > > > > >
> > > > > > +1
> > > > > >
> > > > > > > This patch updates these error messages to use schema-qualified names,
> > > > > > > improving the clarity of error reporting for CREATE PUBLICATION and
> > > > > > > ALTER PUBLICATION commands.
> > > > > > >
> > > > > > > This has been discussed on another thread [1]
> > > > > > >
> > > > > >
> > > > > > The patch works well.
> > > > > >
> > > > > > I think we can pull out
> > > > > > 'get_namespace_name_or_temp(RelationGetNamespace(targetrel))' and
> > > > > > 'RelationGetRelationName(targetrel)' into local variables to reduce
> > > > > > repetition and make the error paths a bit cleaner.
> > > > > >
> > > > > > const char *nspname =
> > > > > > get_namespace_name_or_temp(RelationGetNamespace(targetrel));
> > > > > > const char *relname = RelationGetRelationName(targetrel);
> > > > > >
> > > > >
> > > > > How about having a dedicated function to return the fully qualified
> > > > > relation name you want, which can then substitute the single %s.
> > > > >
> > > > > e.g.
> > > > > errmsg(errormsg, get_qualified_relname(targetrel)), ...
> > > >
> > > > Yeah that makes sense. I will change this.
> > >
> >
> > One trivial thing:
> > +/*
> > + * Get a palloc'd string containing the schema-qualified name  of the relation.
> > + */
> >
> > Extra space here: 'name  of'
>
> Oops, fixed now.
>
> > There is a similar function, generate_qualified_relation_name(),
> > though I guess we can’t directly reuse it here. It takes a relid;
> > while we could extract the OID from the Relation and call it, that
> > seems a bit indirect when we already have the Relation in hand. In
> > that case, a local helper here seems reasonable. Right?
>
> Yeah, we already have a relation descriptor, so it's better to use that.

We can remove the variables relname and result here by changing it to
something like:
static char *
get_qualified_relname(Relation rel)
{
    char *nspname;

    nspname = get_namespace_name_or_temp(RelationGetNamespace(rel));
    if (!nspname)
        elog(ERROR, "cache lookup failed for namespace %u",
             RelationGetNamespace(rel));

    return quote_qualified_identifier(nspname,
                                      RelationGetRelationName(rel));
}

Regards,
Vignesh