Date: Fri, 2 Dec 2022 23:47:21 +0100 (CET)
From: Erik Wienhold <ewie@ewie.name>
To: Jonathan Lemig <jtlemig@gmail.com>
Cc: pgsql-general@lists.postgresql.org
Message-ID: <1800921007.42590.1670021241395@office.mailbox.org>
In-Reply-To: 
 <CABR8q_8dyq8LwdMvkNpeT6OfBv2mqTTza1t0h1Qem1qAmTODfg@mail.gmail.com>
References: 
 <CABR8q__QVKFzaUdQQsyU2wd2TZX1tdv7Q8M5myQ8L=BDDAtjLQ@mail.gmail.com>
 <2133999369.41448.1670016807570@office.mailbox.org>
 <CABR8q_9-sN65XQqDMwB=-7o8b7igpOVDZKFbGS4BaoFLFivhiQ@mail.gmail.com>
 <CABR8q_8dyq8LwdMvkNpeT6OfBv2mqTTza1t0h1Qem1qAmTODfg@mail.gmail.com>
Subject: Re: Views "missing" from information_schema.view_table_usage
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Importance: Normal
Archived-At: 
 <https://www.postgresql.org/message-id/1800921007.42590.1670021241395%40office.mailbox.org>
Precedence: bulk

> On 02/12/2022 23:22 CET Jonathan Lemig <jtlemig@gmail.com> wrote:
>
> It probably wouldn't hurt to have that added to the documentation. I'll=
=C2=A0post
> a message to pgsql-docs. Thanks again!
>
> Jon

Good idea!

Could it be a bug?  Materialized views are a Postgres extension[1] (I alway=
s
thought they are standard.)  But I'd expect them to be included when talkin=
g
about "views".  Maybe they are not included because they are considered bei=
ng
closer to physical tables[2] than views.  Yet their dependencies would just=
ify
inclusion in view_table_usage.

[1] https://www.postgresql.org/docs/15/sql-creatematerializedview.html, see=
 Compatibility
[2] https://www.postgresql.org/docs/9.3/release-9-3.html#AEN119452

> On Fri, Dec 2, 2022 at 4:14 PM Jonathan Lemig <jtlemig@gmail.com> wrote:
> > Hi Erik - sorry I missed your=C2=A0reply when I replied to David's. Tha=
t is
> > indeed the issue. The object that the view is querying is a materialize=
d
> > view.
> >
> > Thanks for the link.
> >
> > Jon
> >
> >
> > On Fri, Dec 2, 2022 at 3:33 PM Erik Wienhold <ewie@ewie.name> wrote:
> > > > On 02/12/2022 21:51 CET Jonathan Lemig <jtlemig@gmail.com> wrote:
> > >  >
> > >  > Has anybody ever encountered this, and if so, did you find a resol=
ution?
> > >  > Or perhaps there other limitations with the VTU that I'm unaware o=
f?
> > >
> > >  Is the one view you cannot find in view_table_usage a materialized v=
iew?
> > >  Because those are not covered by view_table_usage[1].
> > >
> > >  [1] https://git.postgresql.org/gitweb/?p=3Dpostgresql.git;a=3Dblob;f=
=3Dsrc/backend/catalog/information_schema.sql;h=3D18725a02d1fb6ffda3d218033=
b972a0ff23aac3b;hb=3DHEAD#l2605
> > >
> > >  --
> > >  Erik

--
Erik