Re: Creating foreign key constraint to child table?

Stephan Szabo wrote:

> On Sun, 5 Aug 2001, Allan Engelhardt wrote:

[see new example below]

> Not that this is related to what you asked about precisely (I saw the
> response you made), but the query above also doesn't do what you think
> it does right now. It currently makes a reference to only foo, not
> any subchildren of foo.

Oh, man! You are right, but this sux big time: there should not be an asymmetry between a FOREIGN KEY constraint and the SELECT statement. Now that the default is SQL_INHERITANCE ON, it should be the default for the constraint as well, IMHO.

1. Am I the only one who thinks this is a bug?

2. How would I get the behaviour I expect? Write my own trigger? :-P

--- Allan.

test=# create table foo (id integer primary key);
test=# create table bar () inherits (foo);
test=# create table baz (bar integer,
constraint fk_bar foreign key (bar) references foo(id));
test=# insert into foo values (1);
test=# insert into bar values (2);
test=# insert into baz values (2);
ERROR: fk_bar referential integrity violation - key referenced from baz not found in foo
test=# select * from foo where id = 2;
id
----
2
(1 row)

test=#