> If you only need the count when you've got the results, most PG client
> interfaces will tell you how many rows you've got. What language is your app
> in?

But I have only a subset of the results, retrieved via a query with a "LIMIT 
<m>" clause, so $pg_numrows is m.
And retrieving all results (i.e. no LIMIT) is at least as expensive as 


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