Archives of the TeradataForum
Message Posted: Thu, 04 Dec 2003 @ 11:55:52 GMT
Assuming the Optimizer considers Table 2 (with the 3 part UPI) too large to duplicate to all AMPs, then the Optimizer will have to redistribute Table 1 (with 15 part UPI) to all AMPs inorder to perform an AMP local merge on the 3 part UPI.
If the Optimizer does duplicate Table 2 to all AMPs, then it will leave Table1 in place and perform a merge or memory hash join (depending on the size of Table 2 and your Hash Join settings) on the 3 part UPI of Table 2.
Hope this helps,
|Copyright 2012 - All Rights Reserved|
|Last Modified: 21 Mar 2013|