Hello, Is MySQL 5.0's Index merge optimization is also available to multiple table joins? When I do explain on 3 table joins, only one key per table is used :
SELECT R.* FROM L, M, R WHERE L.key1 = 1 AND L.key2 = M.key2 AND M.key1 = R.key1 R table has 10 rows M table has 24 million rows L table has 9 million rows Explain plan only shows ref & eq_ref type optimization is being used. M table has 2 key fields used in the joins and only one is used. Tables are InnoDB, total size of the tables is around 9G. I'm using MySQL max 5.0.16 Any suggestions? Thank you Kayra Otaner -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
