Ok - I understand!

However, could that be stated in the documentation so that is clear?

-----Original Message-----
From: Tom Lane [mailto:t...@sss.pgh.pa.us] 
Sent: Tuesday, June 21, 2016 2:27 PM
To: Alvaro Herrera
Cc: Michael Paquier; Michelle Schwan; pgsql-docs@postgresql.org
Subject: Re: [DOCS] DROP EXTENSION

Alvaro Herrera <alvhe...@2ndquadrant.com> writes:
> Right; mschwan wrote private email to indicate that the function in 
> question is:

> CREATE OR REPLACE FUNCTION public.f_unaccent(text)
>   RETURNS text AS
> $$
>   select public.unaccent('public.unaccent', $1) $$
>   LANGUAGE sql IMMUTABLE;

> so when the unaccent extension is dropped, this function remains (of
> course) but it stops working.

Ah, I kind of suspected that: the issue is that we don't analyze function 
bodies to detect dependencies therein.  In a perfect world we would, but there 
are daunting obstacles in the way.

                        regards, tom lane


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