lost on referentail integrity

Hi,

I'm using PostgreSQL 8.1.4

The problem is very simple to reproduce:


create table test1 (
   pk1 text not null,
   df1 text,
   primary key(pk1)
);

create table test2 (
   pk1 text not null,
   pk2 text not null,
   df2 text,
   primary key(pk1,pk2)
);

alter table test2 add constraint c1 foreign key (pk1) references test1(pk1)
   on update cascade
   on delete cascade;

create or replace function f1() returns "trigger" as '
begin
   return null;
end;
' language "plpgsql";

create trigger trig1 before delete on test2 for each row execute
procedure f1();

insert into test1 values('foo','foo');

insert into test2 values('foo','oof','foooof');

delete from test1;

select * from test2;
 pk1 | pk2 |  df2
-----+-----+--------
 foo | oof | foooof
(1 row)

select * from test1;
 pk1 | df1
-----+-----
(0 rows)