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<snip>
1) I can replace our 'overall-logcal files' with SQL Views, but I
cannot
create an index over multiple tables (as I can via a logical file),
so these views will not give me the sub-second accesstimes I have now
(or am
I wrong in this?)
2) Hibernate creates "joins" over multiple tables under the covers, but
-as
far as I know- this cannot be done on the current "overall-logcial
files",
or on any alternative using "union"- views (I hope I am wrong on this
one
too) ?
</snip>

I am not sure this answers the question. The question was if you run
this over one region using SQL, how long does it take to return the
result set and how big is the result set?

For example, if it takes 30 minutes to query one region and it returns a
100,000 records, union might not be practical.

If it takes a second to run and returns a single result set, unions
should work fine.

Based on what you are saying, you would like to run this from a PC
application. Why not build the result in a stored procedure and return
to caller or am I missing something?



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