"Robert Dyas" <rdyas(at)adelphia(dot)net> writes:
> The following is a list of query pairs (one fast, one slow) that must
> produce identical results by definition (and do), but have very different
> execution times.
With no details about the table schemas, nor the EXPLAIN ANALYZE output
data, I really wonder how you expect any intelligent comments. We are
programmers, not mind-readers.
regards, tom lane