1--- main/myisam_mrr.result 2019-05-14 15:44:52.232663568 +0530 2+++ main/myisam_mrr.reject 2019-05-14 15:51:37.123563538 +0530 3@@ -617,8 +617,8 @@ 4 show status like 'handler_mrr%'; 5 Variable_name Value 6 Handler_mrr_init 1 7-Handler_mrr_key_refills 1 8-Handler_mrr_rowid_refills 1 9+Handler_mrr_key_refills 0 10+Handler_mrr_rowid_refills 0 11 set join_buffer_size=10; 12 explain select sum(t1.b) from t0,t1 where t0.a=t1.a; 13 id select_type table type possible_keys key key_len ref rows Extra 14