Besides the more academic question, whether a B-tree plus SQL interface
is a relational DB, the more interesting point for me is the fact, that
this SQL interface is incomplete. It e.g. does not tell me, on which
volume a specific backup copy of a file is lying. (It tells me all the
volumes that contain a backup copy of that file; but which volume
contains the active copy?)

I assume, that the SHOW command would give me that information (I did not
try it), so the SHOW command is native interface to that DB.

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Reinhard Mersch                        Westfaelische Wilhelms-Universitaet
Reinhard Mersch                        Westfaelische Wilhelms-Universitaet
Zentrum fuer Informationsverarbeitung - ehemals Universitaetsrechenzentrum
Roentgenstrasse 9-13, D-48149 Muenster, Germany      Tel: +49(251)83-31583
E-Mail: mersch AT uni-muenster DOT de                       Fax: 
+49(251)83-31653