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	id AA00283; Mon, 1 Jun 92 13:46:47 -0700
Date: Mon, 1 Jun 92 13:46:47 -0700
Message-Id: <9206012046.AA00283@postgres.Berkeley.EDU>
From: David Feldcamp <feldcamp@cs.ubc.ca>
Subject: attribute != NULL in query
To: postgres@postgres.berkeley.edu
Sender: pg_adm@postgres.berkeley.edu

I am experiencing the problem that whenever I do a query in which one of there 'where'
conditions is of the form 'attribute != NULL' AND the class being queried against
is empty, the query crashes with the message:

Error: No response from the backend, exiting...

Is this a known problem?  Is this a valid query? (it works fine as long as there is
data in the class)