On Tue, 2006-06-06 at 10:31 -0400, Tom Lane wrote: > Simon Riggs <[EMAIL PROTECTED]> writes: > > Perhaps we should call it 'Ordered Scan' so that it is completely > > different from 'Index Scan'? > > It's not an either/or proposition; the planner could be using the index > for both selectivity and ordering.
Good point, but Itagaki's aim was to look at the ordering-only situation, which I think would benefit from separate wording. > This discussion is also overlooking > the possibility that a partial index is being used for its predicate > (again, possibly in combination with explicit index quals and/or > interest in the sort order). Assuming its possible, of course. I wasn't able to verify that code just by eyeballing it, so it doesn't surprise me if you say there are issues. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
