--- r/innodb_bug878769.result 2011-11-22 18:50:25.000000000 +0100 +++ r/innodb_bug878769.reject 2012-02-07 12:45:07.000000000 +0100 @@ -39,7 +39,7 @@ GROUP BY 1,2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index col_int_key col_int_key 5 NULL 12 Using where; Using index; Using temporary; Using filesort -1 SIMPLE t1 ref col_int_key col_int_key 5 test.t2.col_int_key 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 SIMPLE t1 ref col_int_key col_int_key 5 test.t2.col_int_key 1 SELECT t1.col_time_key, t1.col_varchar_key FROM t2 STRAIGHT_JOIN t1 ON t1.col_int_key = t2.col_int_key GROUP BY 1,2;