Foreign Key & Rule confusion WAS: Lost Trigger(s)?

Found the issue. Try out the attached SQL in a fresh database.

I had honestly expected the second delete to work properly as nothing
had to be removed that table.

The rule was added as a temporary measure to protect the data
currently in the table -- without the intent of otherwise impeding the
other informations use. I suppose I forgot that the table wouldn't be
looked at as the rule is checked quite early.

CREATE TABLE junk_parent (
col SERIAL PRIMARY KEY
);

INSERT INTO junk_parent DEFAULT VALUES;
INSERT INTO junk_parent DEFAULT VALUES;
INSERT INTO junk_parent DEFAULT VALUES;

CREATE TABLE junk (
col int4 NOT NULL REFERENCES junk_parent(col) ON UPDATE CASCADE ON
DELETE CASCADE
);

INSERT INTO junk VALUES ('1');

DELETE FROM junk_parent WHERE col = 1;
DELETE FROM junk_parent WHERE col = 2;

--
Rod Taylor

There are always four sides to every story: your side, their side, the
truth, and what really happened.