public inbox for [email protected]  

help / color / mirror / Atom feed

From: [email protected]
To: Steve SAUTETNER <[email protected]>
Cc: [email protected]
Subject: Re: concurent updates
Date: Thu, 26 Jul 2001 11:24:05 -0400
Message-ID: <[email protected]> (raw)



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%[email protected]> on 07/26/2001
05:19:36 AM

To:   pgsql-general%[email protected]
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 [email protected])

view thread (5+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected]
  Subject: Re: concurent updates
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox