KaiGai Kohei <kai...@kaigai.gr.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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