pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Dean Rasheed <dean.a.rasheed@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: Multivariate MCV stats can leak data to unprivileged users
Date: Sat, 18 May 2019 15:45:11 -0400
Message-ID: <568.1558208711@sss.pgh.pa.us> (raw)
In-Reply-To: <20190518190042.2y33h4toxk4fxv5t@development>
References: <CAEZATCUhT9rt7Ui=Vdx4N==VV5XOK5dsXfnGgVOz_JhAicB=ZA@mail.gmail.com>
	<20190513223605.lwj65akict3tpetv@development>
	<CAEZATCWFCN2yBpqpw4kw6xhwdPNz8DERPOWNHHQ_qHV4=tbJ8A@mail.gmail.com>
	<20190517202938.lkx6q2u6woiptrsa@alap3.anarazel.de>
	<CAEZATCX9yU2eKL7-dCWTv1pMMi1hb+PsZyM6gjBxupDnMuEzRw@mail.gmail.com>
	<CAEZATCV5fo2E6K5EVN2uytGjMvhTKTizP_rOW67nPqNK8jHAAg@mail.gmail.com>
	<21269.1558192388@sss.pgh.pa.us>
	<CAEZATCW3iAJnU8opUCXb2i_-8syU7on4cdXLWHBeWr04v67HoQ@mail.gmail.com>
	<4E0E0C14-C476-446A-835F-CC3558709DA9@anarazel.de>
	<20190518190042.2y33h4toxk4fxv5t@development>

Tomas Vondra <tomas.vondra@2ndquadrant.com> writes:
> On Sat, May 18, 2019 at 11:49:06AM -0700, Andres Freund wrote:
>>> On Sat, 18 May 2019 at 16:13, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>>> It seems like what we need here is to have a separation between the
>>>> *definition* of a stats object (which is what pg_dump needs access
>>>> to) and the current actual *data* in it.

>> Otoh, having a suboptimal catalog representation that we'll likely have
>> to change in one of the next releases also isn't great. Seems likely
>> that we'll need post beta1 catversion bumps anyway?

> But that's not an issue intruduced by PG12, it works like that even for
> the extended statistics introduced in PG10.

Yeah, but no time like the present to fix it if it's wrong ...

			regards, tom lane





view thread (34+ messages)  latest in thread

Message-ID: <568.1558208711@sss.pgh.pa.us>
Permalink:  ../568.1558208711@sss.pgh.pa.us/
Also on:    postgresql.org/message-id/568.1558208711@sss.pgh.pa.us

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: tgl@sss.pgh.pa.us, tomas.vondra@2ndquadrant.com, andres@anarazel.de, dean.a.rasheed@gmail.com
  Subject: Re: Multivariate MCV stats can leak data to unprivileged users
  In-Reply-To: <568.1558208711@sss.pgh.pa.us>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox