Create or replace function doesn't work so well

peter=# drop function test();
DROP

peter=# create or replace function test() returns int as 'return 1;' language plperl;
CREATE
peter=# select test();test
------   1
(1 row)

peter=# create or replace function test() returns int as 'return 2;' language plperl;
CREATE
peter=# select test();test
------   1
(1 row)

The same can be observed with PL/Tcl and PL/Python, but not with PL/pgSQL
and plain SQL.  Obviously, there is some caching going on, and a session
restart fixes everything, but the failure with this plain and simple test
case makes me wonder about this new feature...

-- 
Peter Eisentraut   peter_e@gmx.net   http://funkturm.homeip.net/~peter