Message 86

tuple concatenation

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Date: Sat, 20 Oct 2001 15:19:31 -0400
From: Francisco Pereira <fpereira+@cs.cmu.edu>
Organization: School of Computer Science, Carnegie Mellon University
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Subject: tuple concatenation
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What should we do when concatening tuples while joining on key K?
E.g.

R.field1 ... R.field K ... R.field N and S.field1 ... S.field K

Shoud we get rid of one of the field K columns? If so, which?

thanks,
francisco