<[EMAIL PROTECTED]> wrote > I have a slow sql: > SELECT * FROM mytable WHERE id IN (1,3,5,7,....3k here...); > mytable is about 10k rows. > > if don't use the "IN" clause, it will cost 0,11 second, otherwise it > will cost 2.x second > I guess pg use linear search to deal with IN clause, is there any way > to let pg use other search method with IN clause? (ex.Binary Search or > hash Search) >
If you can put (1, 3, .., 3k) in a table, PG may choose a hash join. Regards, Qingqing ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
