I'm trying to update one of my primary key columns of a composite key. Toplink
does attempt the update, but the 'where clause' contains the new value instead
of the old, which means the update fails because there is no match.
// a and b are primary keys
If I change b=2, toplink issues an update that says "update b=2 where a=1 and
b=2". It should say "... and b=1".