More view problems

Building on DeJuan's suggestion, we have arrived at the following code
(using the extra view because from queries don't seem to allow sub
queries):

create view tab021temp as select fldkey as fldkey2, fld000 as fld000,
fld001 as fld001 from tab000 group by fld001, fld000, fldkey2;

create view tab021 as select count(1) as fldkey, a.fldkey2, a.fld000,
a.fld001 from tab021temp a, tab021temp b where a.fld001 > b.fld001 or
(a.fld001 = b.fld001 and a.fld000 > b.fld000) or a.fld000 = b.fld000
grouPQexec() -- Request was sent to backend, but backend closed the
channel before rp by fld001, fld000, fldkey2;

select * from tab021;

This terminates in psql with the following error after the select
statement is made:

PQexec() -- Request was sent to backend, but backend closed the channel
before r
esponding. This probably means the backend terminated abnormally before
or while pr ocessing the request.

What is going on here? Multi level views seem to work if they are
simple.  Why is the connection being dropped?  JDBC gives up a similar
broken pipe error.

-JP