Hello Heikki, probably I found a bug in patch:
CREATE FUNCTION fx(i integer) RETURNS integer LANGUAGE plpgsql AS $$begin raise notice '>>%<<', i; return i; end;$$; CREATE FUNCTION fx1(integer) RETURNS text LANGUAGE sql AS $_$ select case $1 when 1 then 'A' else 'B' end$_$; CREATE FUNCTION fx2(text) RETURNS text LANGUAGE sql AS $_$ select case $1 when 'A' then 'a' else 'b' end$_$; CREATE TABLE foo ( a integer ); COPY foo (a) FROM stdin; 1 0 \. postgres=# select fx2(fx1(fx(a))) from foo; NOTICE: >>1<< ERROR: invalid expression parameter reference (1 levels up, while stack is only 1 elements deep) Regards Pavel -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers