| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | KaiGai Kohei <kaigai(at)kaigai(dot)gr(dot)jp> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, HeikkiLinnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: leaky views, yet again |
| Date: | 2010-10-19 14:41:08 |
| Message-ID: | 10227.1287499268@sss.pgh.pa.us |
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KaiGai Kohei <kaigai(at)kaigai(dot)gr(dot)jp> writes:
> (2010/10/19 21:31), Robert Haas wrote:
>> I think you're still misreading it.
> Hmm. In my understanding, it seems to me he concerned about possible leaky
> estimate functions, so he mentioned the horrible performance degrading, if
> we don't allow to execute these functions.
No, it wasn't about estimator functions at all, it was about what we do
in the absence of an estimator.
> So, I suggested an idea that enforces all estimate functions being installed
> by superusers; it enables us to assume they are enough safe.
Even if we were willing to accept a limitation as stringent as that,
preventing people from installing estimators is hardly going to cure
the problem.
regards, tom lane
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