obshashrange: keep value fetched from sql in memory
This will reduce the number of roundtrip to the data base we need.
This software was downloaded from
http://hg.netv6.net/evolve-main/
Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Logilab SA <contact@logilab.fr>
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Patrick Mezard <patrick@mezard.eu>
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