20日, 下午3時37分, John Patterson jdpatter...@gmail.com wrote:
If you are going to change the relation often you might want to have a
resolution Entity in the middle - lets say CurrentB.
A-CurrentB-B
instead of updating every A just update the single CurrentB
On 20 Jan 2010, at 14:05, Alan She
to overwrite B so the key stays the
same but the data in it changes.
On 20 Jan 2010, at 15:31, Alan She wrote:
Thanks! This really a smart way for relations that often changes.
But I wonder if this is the only way?
What if the relation seldom change?
I believe the cost of the indirection
