multi-column btree index for real values

From: "Martin D(dot) Weinberg" <weinberg(at)osprey(dot)astro(dot)umass(dot)edu>
To: pgsql-general(at)postgresql(dot)org
Subject: multi-column btree index for real values
Date: 2002-10-04 17:46:18
Message-ID: 20021004134618.576f3afc.weinberg@osprey.astro.umass.edu
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Folks,

Can someone quickly describe how the btree is implemented for multiple
columns? In particular, under what (if any) circumstances is there an
advantage if the index is over floating point values?

Thanks!

--Martin

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