Re: How to synchronize two tables using UPDATE triggers?

Hi,

You may try to use package variable in order to save state of update. Say, default value is 0. Each trigger checks it state. If state is 0 then propagate update to the second table and set it to 1. If state is 1 then don't propagate updates and simply set state to 0.

                                   Andrew Protasov

Yanhua Lu wrote in message <3511DD1A.DF8FA8F6_at_pacbell.net>...
>Hi there,
>
>I ran into the problem of synchronizing two tables, say table A and
>table B using update triggers. What I hope to see is once a row in table
>A is updated, the correspdoning row in table B is updated right away to
>reflect the change, and vice versa. My first thought was to implement an
>AFTER update row trigger on both tables, but I realize afterwards that
>it will end up with recursive loop, i.e. table A trigger fires table B
>trigger which fires table A trigger again... Does anybody happens to
>know any work around with this problem, or you have better way to
>synchronize two tables without using triggers?
>
>Thanks a lot in advance.
>
>-- Lu :)
>
>
>
Received on Fri Mar 20 1998 - 00:00:00 CST