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	id AA07276; Fri, 29 Nov 91 06:35:20 -0800
Date: Fri, 29 Nov 91 06:35:20 -0800
Message-Id: <9111291435.AA07276@postgres.Berkeley.EDU>
From: Walid Aref <aref@alv.umd.edu>
Subject: rectangle intersection
To: postgres@postgres.berkeley.edu
Sender: pg_adm@postgres.berkeley.edu
Cc: aref@alv.umd.edu

Can I perform the following operation in Postgres using any possible 
mechanism (e.g., using ADTs, etc) or any equivalent syntax?

	attr1 intersects attr2 

where attr1 represents boxes indexed by an R-tree, and attr2 represents 
another set of boxes, also indexed by another R-tree?

Thanks.
walid