[ please don't top-post, it makes conversations unreadable ]
Marcin Giedz <marcin.giedz@arise.pl> writes:
> so look at this:
> postgres=# drop extension plpython;
> ERROR: extension "plpython" does not exist
> postgres=# drop extension plpythonu;
> ERROR: extension "plpythonu" does not exist
> postgres=# drop extension plpython2u;
> ERROR: extension "plpython2u" does not exist
Well, the pg_upgrade failure clearly shows that you've got some
functions referencing plpython2. Maybe they're "loose" instead
of being bound into an extension --- that's quite possible if
this database has been brought forward from some pre-9.1 state.
Try looking in each database with
select * from pg_proc where probin like '%python2%';
regards, tom lane