Why do you need to change the value of the id field?? The id field shouldn't
have any meaning attached to it beyond the fact that it uniquely identifies a
row in the table, and of course its usage as a foreign key when it serves that
role. If you just want to change what numbers get assigned, I think you can
update the SEQUENCE that table1 uses.
If you really need to do this, you might have better luck using a trigger to do
a cascading update from table1 to table2, and then ONLY issue the update to
table1, counting on the trigger to update table2.
"Steve SAUTETNER" <ssa%informactis.com@interlock.lexmark.com> on 07/26/2001
05:19:36 AM
To: pgsql-general%postgresql.org@interlock.lexmark.com
cc: (bcc: Wesley Sheldahl/Lex/Lexmark)
Subject: [GENERAL] concurent updates
hi everybody !
I've got a little problem when updating a primary key in two table
where the primary key of the one is a foreign key from the second :
here are the 2 tables :
create table table1 (id int primary key, col1 int);
create table table2 (id int primary key references table1(id), col2 int);
and the 2 updates :
1) update table2 set id = 1001 where id = 1;
2) update table1 set id = 1001 where id = 1;
i can't execute them separately because of an integrity constraint
violation.
i've got the same error in a BEGIN / COMMIT block containing the updates.
Does any one see how two help me ?
thanks.
---------------------------(end of broadcast)---------------------------
TIP 2: you can get off all lists at once with the unregister command
(send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
