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Re: leaky views, yet again

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, KaiGai Kohei <kaigai(at)kaigai(dot)gr(dot)jp>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: leaky views, yet again
Date: 2010-09-02 02:57:08
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Lists: pgsql-hackers
2010/9/1 KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>:
> Right now, it stands on a strict assumption that considers operators
> implemented with built-in functions are safe; it does not have no
> possibility to leak supplied arguments anywhere.
> Please note that this patch does not case about a case when
> a function inside a view and a function outside a view are
> distributed into same level and the later function has lower
> cost value.

Without making some attempt to address these two points, I don't see
the point of this patch.

Also, I believe we decided previously do this deoptimization only in
case the user requests it with CREATE SECURITY VIEW.

Robert Haas
The Enterprise Postgres Company

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