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Archives of the TeradataForum
Message Posted: Thu, 27 Apr 2006 @ 18:55:10 GMT
Subj: | | Re: Question about UPI Vs NUPI |
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From: | | smishra2 |
Naveen,
I understand but in TD to minimize the data movement across AMPs you have to define an appropriate PI. For example, suppose there is an one-to-
many relationship between tables ITEM and ITEM_LINE. PK of these tables may be different. But I can have PI of these two tables same to keep them
in same AMP for join. i.e ITEM or ITEM_LINE will not be re-distributed across the AMPs each time you join them. Join will happen locally on each
AMP as they have same PI.
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