On Thu, Sep 01, 2005 at 06:42:31PM +0100, Matthew Sackman wrote: > > "address_pc_top_index" btree (postcode_top) > "address_pc_top_middle_bottom_index" btree (postcode_top, > postcode_middle, postcode_bottom) > "address_pc_top_middle_index" btree (postcode_top, postcode_middle)
This doesn't address the query performance problem, but isn't only one of these indexes necessary? The second one, on all three columns, because searches involving only postcode_top or only postcode_top and postcode_middle could use it, making the indexes on only those columns superfluous. Or am I missing something? -- Michael Fuhr ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
