Mike Nolan <nolan@gw.tssi.com> writes:
> If I set up an on update trigger for table 'A' that updates the
> corresponding column in table 'B', and one for table 'B' that updates
> the corresponding column in table 'A', does that create an endless loop?
Yes.
You could break the loop perhaps by not issuing an UPDATE if the data is
already correct in the other table.
regards, tom lane