ALTER EXTENSION UPGRADE, v3

Hi,

PFA version 3 of the ALTER EXTENSION PATCH, cleaned and merged against
recent HEAD and extension's branch from which I just produced the v30
patch.

It includes a way to upgrade "from null", that is from pre-9.1, and the
specific upgrade files to achieve that for all contribs. That goes like
this:

dim=# \i ~/pgsql/exts/share/contrib/lo.sql
CREATE DOMAIN
CREATE FUNCTION
CREATE FUNCTION
dim=# create wrapper extension lo;
CREATE EXTENSION
dim=# alter extension lo upgrade;
ALTER EXTENSION
dim=# alter extension lo set schema utils;
ALTER EXTENSION
dim=# \dx lo
Objects in extension "lo"
Object Description
---------------------------------
function utils.lo_manage()
function utils.lo_oid(utils.lo)
type utils.lo
(3 rows)

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