I have 2 tables ART and MTF as follow:
create table art(
artid int4 primary key,
mtfid int4, -- can be null or foreign key with MTF
constraint ck_mtfid check(mtfid is null or fk_mtfid(mtfid))
);
create table mtf(
mtfid int4 primary key
);
create function fk_mtfid(int4) returns bool as '
declare result int4;
begin select mtfid into result from mtf where mtfid = $1;
if found then return true; else return false; end if;
end;
' language 'plpgsql';
The function works fine when I run it at the psql prompt, but when I tried
to insert some tuple in ART I have the following error:
"ERROR: init_fcache: Cache lookup failed for procedure 273568"
Best Regards,
Stephane.