away with doing so, thus saving a single BTree search per row of result.
This could potentially double the speed of certain queries. The
code passes all regression tests but new tests to exercise the new
functionality are yet to be added. (CVS 2170)
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of the form "ORDER BY rowid" if a table scan is being performed. Do a
reverse table scan if "ORDER BY rowid DESC" is present. (CVS 2141)
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