Re: Review: Extensions Patch

From: Dimitri Fontaine <dimitri(at)2ndQuadrant(dot)fr>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Review: Extensions Patch
Date: 2010-12-08 20:04:17
Message-ID: m28w00ni9q.fsf@2ndQuadrant.fr
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> Exposing it to the user is what I think is ugly.

Ok, and the current idea fixes that! :)

> It's also worth noting that ALTER EXTENSION .. SET SCHEMA does NOT
> guarantee a correct relocation, because someone might have done ALTER
> FUNCTION .. SET search_path = @extschema@, and that's not going to get
> properly fixed up. I'm coming to the conclusion more and more that
> ALTER EXTENSION .. SET SCHEMA just can't work reliably.

For starters, an extension's script that requires an @extschema@
property is to be marked non-relocatable, so the command here would just
error out. Then again, should the extension's author forgot to mark it
relocatable, the @extschema@ placeholder is not replaced in the current
proposal, so that means that the objects schema are all hard-coded in
the script.

Then, if the superuser thinks it's a good idea to break the extension
after it's been installed, I'm not sure we can do anything about it.

Regards,
--
Dimitri Fontaine
http://2ndQuadrant.fr PostgreSQL : Expertise, Formation et Support

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