The following bug has been logged online:
Bug reference: 5495
Logged by: Martin Edlman
Email address: edlman@fortech.cz
PostgreSQL version: 8.4.4
Operating system: Scientific Linux 5.5 (RHEL)
Description: RI/FK on self and inherited table
Details:
I have a table
net.device(id serial, parent_id integer null, name varchar(100), ip_address
inet, ...)
device_parent_id_fkey FOREIGN KEY (parent_id) REFERENCES net.device(id) ON
UPDATE CASCADE
and a table
net.computer(parent_id integer not null, ...) inherits (net.device);
I have a script which inserts records to both tables and it always stops on
the same record for net.computer with followin message
ERROR: insert or update on table "device" violates foreign key constraint
"device_parent_id_fkey"
DETAIL: Key (parent_id)=(19947) is not present in table "device".
But the record is there, it was inserted into net.computer so it's
selectable from net.device and from net.computer.
select id,parent_id,name,ip_address from net.device where id = 19947;
id | parent_id | name | ip_address
-------+-----------+-----------------+--------------------
19947 | 1649 | pc-lit-customer | 213.213.213.213/30
select id,parent_id,name,ip_address from net.computer where id = 19947;
id | parent_id | name | ip_address
-------+-----------+-----------------+--------------------
19947 | 1649 | pc-lit-digistyl | 213.250.201.222/30
There are other records in the net.computer which are referenced in other
records as the parent_id.
It really puzzles me.
If you want I can send you full definition of the net.device and the
net.computer including indices, triggers etc.
I have inserted 1795 records to net.device
select count(*) from only net.device;
count
-------
1795
and 5105 records to net.computer
select count(*) from only net.computer;
count
-------
5105
That's 6900 records in total
select count(*) from net.device;
count
-------
6900
