Horton

Re: ExecRTCheckPerms() and many prunable partitions (checkAsUser)

Amit Langote <amitlangote09@gmail.com>

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From: Amit Langote <amitlangote09@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, Justin Pryzby <pryzby@telsasoft.com>, Ian Lawrence Barwick <barwick@gmail.com>, David Rowley <dgrowleyml@gmail.com>, Greg Stark <stark@mit.edu>, Julien Rouhaud <rjuju123@gmail.com>, pgsql-hackers@lists.postgresql.org
Date: 2023-06-28T07:30:54Z
Lists: pgsql-hackers

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Hi,

On Tue, Feb 21, 2023 at 4:12 PM Amit Langote <amitlangote09@gmail.com> wrote:
> On Tue, Feb 21, 2023 at 12:40 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> > > On 2023-Feb-20, Amit Langote wrote:
> > >> One more thing we could try is come up with a postgres_fdw test case,
> > >> because it uses the RelOptInfo.userid value for remote-costs-based
> > >> path size estimation.  But adding a test case to contrib module's
> > >> suite test a core planner change might seem strange, ;-).
> >
> > > Maybe.  Perhaps adding it in a separate file there is okay?
> >
> > There is plenty of stuff in contrib module tests that is really
> > there to test core-code behavior.  (You could indeed argue that
> > *all* of contrib is there for that purpose.)  If it's not
> > convenient to test something without an extension, just do it
> > and don't sweat about that.
>
> OK.  Attached adds a test case to postgres_fdw's suite.  You can see
> that it fails without a316a3bc.

Noticed that there's an RfC entry for this in the next CF.  Here's an
updated version of the patch where I updated the comments a bit and
the commit message.

I'm thinking of pushing this on Friday barring objections.

-- 
Thanks, Amit Langote
EDB: http://www.enterprisedb.com

Commits

  1. Add a test case for a316a3bc

  2. Correctly set userid of subquery relations' child rels

  3. Fix buggy recursion in flatten_rtes_walker().

  4. Remove some dead code in selfuncs.c

  5. Update outdated comment in ApplyRetrieveRule

  6. Rework query relation permission checking

  7. Generalize ri_RootToPartitionMap to use for non-partition children

  8. Stop accessing checkAsUser via RTE in some cases

  9. Add 'missing_ok' argument to build_attrmap_by_name