The following bug has been logged online:
Bug reference: 6268
Logged by: Roman Lytovchenko
Email address: [email protected]
PostgreSQL version: 9.1.1
Operating system: Mac OS X 10.6.8
Description: multiple update with on cascade
Details:
create table t2 (
a text not null,
b text null,
constraint t2_pk primary key (a),
constraint t2_t2_fk foreign key (b)
references t2 (a) match simple
on update cascade -- !
on delete cascade
deferrable
initially deferred -- !
);
insert into t2 (a, b)
values
('www', 'www'),
('asd', 'asd');
-- run this transaction in another connection!
start transaction;
set constraints all immediate;
update t2
set a = '123'
where a = 'www';
select
a, b
from t2;
-- this update failed with
-- ERROR: insert or update on table "t2" violates foreign key
constraint "t2_t2_fk"
-- Detail: Key (b)=(123) is not present in table "t2".
update t2
set a = 'kkk'
where a = '123';
commit;
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