Re: Documentation fix for CREATE FUNCTION - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Documentation fix for CREATE FUNCTION
Date
Msg-id 5819.1468594816@sss.pgh.pa.us
Whole thread Raw
In response to Re: Documentation fix for CREATE FUNCTION  (Albe Laurenz <laurenz.albe@wien.gv.at>)
List pgsql-hackers
Albe Laurenz <laurenz.albe@wien.gv.at> writes:
> Tom Lane wrote:
>> I believe the reason for forcing pg_temp to the back of the path is to
>> prevent unqualified table names from being captured by pg_temp entries.
>> This risk exists despite the rule against searching pg_temp for functions
>> or operators.  A maliciously named temp table could at least prevent
>> a security definer function from doing what it was supposed to, and
>> could probably hijack control entirely via triggers or rules.
>> 
>> Possibly the documentation should be more explicit about why this is
>> being done, but the example code is good as-is.

> Maybe something like the attached would keep people like me from
> misunderstanding this.

I rewrote this a bit and pushed it.  Thanks for the suggestion!

https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=ce150e7e0fc1a127fee7933d71f4204a79ecce04
        regards, tom lane



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