| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Multivariate MCV stats can leak data to unprivileged users |
| Date: | 2019-05-18 19:45:11 |
| Message-ID: | 568.1558208711@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)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(at)sss(dot)pgh(dot)pa(dot)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
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