After-merge fix: Re-record results

mysql-test/suite/galera/r/galera_performance_schema.result

+connection node_2;
+connection node_1;
 use performance_schema;
 SELECT name
 FROM threads
@@ -5,25 +7,29 @@ WHERE name LIKE 'thread/sql/wsrep%'
 ORDER BY name;
 name	thread/sql/wsrep_applier_thread
 name	thread/sql/wsrep_rollbacker_thread
+name	thread/sql/wsrep_rollbacker_thread
 use test;
 create table t1 (a int not null primary key) engine=innodb;
 insert into t1 values (1),(2);
 use performance_schema;
 select name from mutex_instances where name like 'wait/synch/mutex/sql/LOCK_wsrep%' order by name;
+name	wait/synch/mutex/sql/LOCK_wsrep_cluster_config
 name	wait/synch/mutex/sql/LOCK_wsrep_config_state
 name	wait/synch/mutex/sql/LOCK_wsrep_desync
+name	wait/synch/mutex/sql/LOCK_wsrep_group_commit
 name	wait/synch/mutex/sql/LOCK_wsrep_ready
 name	wait/synch/mutex/sql/LOCK_wsrep_replaying
-name	wait/synch/mutex/sql/LOCK_wsrep_rollback
 name	wait/synch/mutex/sql/LOCK_wsrep_slave_threads
+name	wait/synch/mutex/sql/LOCK_wsrep_SR_pool
+name	wait/synch/mutex/sql/LOCK_wsrep_SR_store
 name	wait/synch/mutex/sql/LOCK_wsrep_sst
 name	wait/synch/mutex/sql/LOCK_wsrep_sst_init
 select name from cond_instances where name like 'wait/synch/cond/sql/COND_wsrep%' order by name;
 name	wait/synch/cond/sql/COND_wsrep_ready
 name	wait/synch/cond/sql/COND_wsrep_replaying
-name	wait/synch/cond/sql/COND_wsrep_rollback
 name	wait/synch/cond/sql/COND_wsrep_sst
 name	wait/synch/cond/sql/COND_wsrep_sst_init
+name	wait/synch/cond/sql/COND_wsrep_wsrep_slave_threads
 connection node_2;
 use test;
 SET SESSION wsrep_on=OFF;

storage/rocksdb/mysql-test/rocksdb/r/group_min_max.result

@@ -42,6 +42,7 @@ create index idx_t1_1 on t1 (a1,a2,b,c);
 create index idx_t1_2 on t1 (a1,a2,b);
 analyze table t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 drop table if exists t2;
 create table t2 (
@@ -70,6 +71,7 @@ create index idx_t2_1 on t2 (a1,a2,b,c);
 create index idx_t2_2 on t2 (a1,a2,b);
 analyze table t2;
 Table	Op	Msg_type	Msg_text
+test.t2	analyze	status	Engine-independent statistics collected
 test.t2	analyze	status	OK
 drop table if exists t3;
 create table t3 (
@@ -132,37 +134,38 @@ create index idx_t3_1 on t3 (a1,a2,b,c);
 create index idx_t3_2 on t3 (a1,a2,b);
 analyze table t3;
 Table	Op	Msg_type	Msg_text
+test.t3	analyze	status	Engine-independent statistics collected
 test.t3	analyze	status	OK
 explain select a1, min(a2) from t1 group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using index for group-by
 explain select a1, max(a2) from t1 group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	65	NULL	63	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	65	NULL	5	Using index for group-by
 explain select a1, min(a2), max(a2) from t1 group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using index for group-by
 explain select a1, a2, b, min(c), max(c) from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using index for group-by
 explain select a1,a2,b,max(c),min(c) from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using index for group-by
 explain select a1,a2,b,max(c),min(c) from t2 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	NULL	idx_t2_1	#	NULL	#	Using index for group-by
 explain select min(a2), a1, max(a2), min(a2), a1 from t1 group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using index for group-by
 explain select a1, b, min(c), a1, max(c), b, a2, max(c), max(c) from t1 group by a1, a2, b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using index for group-by
 explain select min(a2) from t1 group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using index for group-by
 explain select a2, min(c), max(c) from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using index for group-by
 select a1, min(a2) from t1 group by a1;
 a1	min(a2)
 a	a
@@ -289,37 +292,37 @@ b	i421	l421
 b	m422	p422
 explain select a1,a2,b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'b' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	502	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1, max(c)            from t1 where a1 >= 'c' or a1 < 'b' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	502	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where a1 >= 'c' or a2 < 'b' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	753	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where a1 = 'z' or a1 = 'b' or a1 = 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	753	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	1004	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	1004	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,min(c),max(c)      from t1 where a1 >= 'b' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,  max(c)           from t1 where a1 in ('a','b','d') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	753	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t2 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	146	NULL	#	Using where; Using index for group-by
@@ -681,97 +684,97 @@ d	p422
 #  So the following results are not very meaningful, but are still kept here
 explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	5	Using where; Using index for group-by
 explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a' or a2 = 'b') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,max(c),min(c)      from t1 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	5	Using where; Using index for group-by
 explain select a1,max(c),min(c)      from t1 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,max(c),min(c)      from t1 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2,b,       max(c) from t1 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	9	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2,b,min(c),max(c) from t1 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	9	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2, max(c)         from t1 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	9	Using where; Using index for group-by
 explain select a1,a2, max(c)         from t1 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	6	Using where; Using index for group-by
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,max(c),min(c)      from t2 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	6	Using where; Using index for group-by
 explain select a1,max(c),min(c)      from t2 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,max(c),min(c)      from t2 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,       max(c) from t2 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	10	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t2 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,min(c),max(c) from t2 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	10	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t2 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2, max(c)         from t2 where (b = 'b') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	10	Using where; Using index for group-by
 explain select a1,a2, max(c)         from t2 where (b = 'b' or b = 'a') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	range	NULL	idx_t3_1	6	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t3	range	NULL	idx_t3_1	6	NULL	4	Using where; Using index for group-by
 explain select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	1000	Using where; Using index
+1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	192	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t3 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	1000	Using where; Using index
+1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	192	Using where; Using index
 explain select a1,max(c),min(c)      from t3 where (a2 = 'a') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	range	NULL	idx_t3_1	6	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t3	range	NULL	idx_t3_1	6	NULL	4	Using where; Using index for group-by
 explain select a1,max(c),min(c)      from t3 where (a2 = 'a' or a2 = 'b') and (b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	1000	Using where; Using index
+1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	192	Using where; Using index
 explain select a1,max(c),min(c)      from t3 where (a2 = 'a') and (b = 'b' or b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	1000	Using where; Using index
+1	SIMPLE	t3	index	NULL	idx_t3_1	10	NULL	192	Using where; Using index
 select a1,a2,b,max(c),min(c) from t1 where (a2 = 'a') and (b = 'b') group by a1;
 a1	a2	b	max(c)	min(c)
 a	a	b	h112	e112
@@ -1014,25 +1017,25 @@ b	h212	a211
 c	h312	a311
 explain select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	6	Using where; Using index for group-by
 explain select a1,a2,b,min(c) from t2 where (a2 = 'a' or a2 = 'b') and b is NULL group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c) from t2 where (a2 = 'a') and b is NULL group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	6	Using where; Using index for group-by
 explain select a1,a2,b,max(c) from t2 where (a2 = 'a' or a2 = 'b') and b is NULL group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,min(c) from t2 where b is NULL group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	10	Using where; Using index for group-by
 explain select a1,a2,b,max(c) from t2 where b is NULL group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	10	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t2 where b is NULL group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	10	Using where; Using index for group-by
 select a1,a2,b,min(c) from t2 where (a2 = 'a') and b is NULL group by a1;
 a1	a2	b	min(c)
 a	a	NULL	a777
@@ -1070,49 +1073,49 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	#	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (c > 'f123') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c > 'f123') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (c < 'a0') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (c < 'k321') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c < 'k321') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c < 'a0') or (c > 'b1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b1') or (c <= 'g1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c > 'b111') and (c <= 'g112') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c < 'c5') or (c = 'g412') or (c = 'k421') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where ((c > 'b111') and (c <= 'g112')) or ((c > 'd000') and (c <= 'i110')) group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (c between 'b111' and 'g112') or (c between 'd000' and 'i110') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,       max(c) from t2 where (c > 'b1') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using where; Using index for group-by
@@ -1579,36 +1582,36 @@ explain select a1,a2,b,min(c),max(c) from t1
 where exists ( select * from t2 where t2.c = t1.c )
 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	index	NULL	idx_t1_1	163	NULL	1000	Using index
+1	PRIMARY	t1	index	NULL	idx_t1_1	163	NULL	128	Using index
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func	1	
-2	MATERIALIZED	t2	index	NULL	idx_t2_1	163	NULL	1000	Using index
+2	MATERIALIZED	t2	index	NULL	idx_t2_1	163	NULL	164	Using index
 explain select a1,a2,b,min(c),max(c) from t1
 where exists ( select * from t2 where t2.c > 'b1' )
 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	index	NULL	idx_t1_1	163	NULL	1000	Using index
-2	SUBQUERY	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	PRIMARY	t1	index	NULL	idx_t1_1	163	NULL	128	Using index
+2	SUBQUERY	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (c > 'b111') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t1 where (a2 >= 'b') and (b = 'a') and (c > 'b111') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c < 'h112') or (c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122')) group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	502	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c) from t1 where ((a1 > 'a') or (a1 < '9'))  and ((a2 >= 'b') and (a2 < 'z')) and (b = 'a') and ((c = 'j121') or (c > 'k121' and c < 'm122') or (c > 'o122') or (c < 'h112') or (c = 'c111')) group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	502	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b,min(c) from t1 where (ord(a1) > 97) and (ord(a2) + ord(a1) > 194) and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,min(c),max(c) from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	163	NULL	#	Using where; Using index for group-by
@@ -1713,25 +1716,25 @@ select a1,a2,b,min(c) from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') grou
 a1	a2	b	min(c)
 explain select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121' or c = 'i121') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	133	Using where; Using index for group-by
 explain select a1,a2,b from t2 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain select a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain select a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	#	Using where; Using index for group-by
@@ -1740,7 +1743,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	#	Using where; Using index for group-by
 explain select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 select a1,a2,b from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b;
 a1	a2	b
 a	a	b
@@ -1788,50 +1791,50 @@ select a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1
 a1	a2	b
 explain select distinct a1,a2,b from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using index for group-by
 explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using where; Using index for group-by
 explain extended select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	501	100.00	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	65	100.00	Using where; Using index for group-by
 Warnings:
 Note	1003	select distinct `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where `test`.`t1`.`b` = 'a' and `test`.`t1`.`c` = 'i121' and `test`.`t1`.`a2` >= 'b'
 explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	133	Using where; Using index for group-by
 explain select distinct b from t1 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	Using where; Using index
 explain select distinct a1 from t1 where a1 in ('a', 'd') and a2 = 'b';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	130	NULL	39	Using where; Using index for group-by
 explain select distinct a1 from t1 where a1 in ('a', 'd') and a2 = 'e';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	130	NULL	39	Using where; Using index for group-by
 explain select distinct a1,a2,b from t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using index for group-by
 explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain extended select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	501	100.00	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	83	100.00	Using where; Using index for group-by
 Warnings:
 Note	1003	select distinct `test`.`t2`.`a1` AS `a1`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where `test`.`t2`.`b` = 'a' and `test`.`t2`.`c` = 'i121' and `test`.`t2`.`a2` >= 'b'
 explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain select distinct b from t2 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_2	146	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_2	146	NULL	164	Using where; Using index
 explain select distinct a1 from t2 where a1 in ('a', 'd') and a2 = 'b';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	129	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	129	NULL	37	Using where; Using index for group-by
 explain select distinct a1 from t2 where a1 in ('a', 'd') and a2 = 'e';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	129	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	129	NULL	37	Using where; Using index for group-by
 select distinct a1,a2,b from t1;
 a1	a2	b
 a	a	a
@@ -1960,46 +1963,46 @@ c	e
 d	e
 explain select distinct a1,a2,b from t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using index for group-by
 explain select distinct a1,a2,b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using where; Using index for group-by
 explain select distinct a1,a2,b,c from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	17	Using where; Using index for group-by
 explain select distinct a1,a2,b from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	133	Using where; Using index for group-by
 explain select distinct b from t1 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by; Using temporary; Using filesort
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using where; Using index for group-by; Using temporary; Using filesort
 explain select distinct a1 from t1 where a1 in ('a', 'd') and a2 = 'b' group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	130	NULL	39	Using where; Using index for group-by
 explain select distinct a1 from t1 where a1 in ('a', 'd') and a2 = 'e' group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	130	NULL	39	Using where; Using index for group-by
 explain select distinct a1,a2,b from t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using index for group-by
 explain select distinct a1,a2,b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain select distinct a1,a2,b,c from t2 where (a2 >= 'b') and (b = 'a') and (c = 'i121') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	range	NULL	idx_t2_1	163	NULL	#	Using where; Using index for group-by
 explain select distinct a1,a2,b from t2 where (a1 > 'a') and (a2 > 'a') and (b = 'c') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	146	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	146	NULL	#	Using where; Using index for group-by
 explain select distinct b from t2 where (a2 >= 'b') and (b = 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	idx_t2_1	146	NULL	#	Using where; Using index for group-by; Using temporary; Using filesort
+1	SIMPLE	t2	range	NULL	idx_t2_2	146	NULL	#	Using where; Using index for group-by; Using temporary; Using filesort
 explain select distinct a1 from t2 where a1 in ('a', 'd') and a2 = 'b' group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	129	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	129	NULL	#	Using where; Using index for group-by
 explain select distinct a1 from t2 where a1 in ('a', 'd') and a2 = 'e' group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_1	129	NULL	#	Using where; Using index for group-by
+1	SIMPLE	t2	range	idx_t2_0,idx_t2_1,idx_t2_2	idx_t2_2	129	NULL	#	Using where; Using index for group-by
 select distinct a1,a2,b from t1;
 a1	a2	b
 a	a	a
@@ -2082,21 +2085,21 @@ select distinct a1 from t2 where a1 in ('a', 'd') and a2 = 'e' group by a1;
 a1
 explain select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_2	147	NULL	17	Using where; Using index for group-by
 explain select count(distinct a1,a2,b,c) from t1 where (a2 >= 'b') and (b = 'a') and (c = 'i121');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	501	Using where; Using index for group-by (scanning)
+1	SIMPLE	t1	range	NULL	idx_t1_1	163	NULL	65	Using where; Using index for group-by
 explain extended select count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a') and (b = 'c');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	100.00	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	133	100.00	Using where; Using index for group-by
 Warnings:
 Note	1003	select count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`) AS `count(distinct a1,a2,b)` from `test`.`t1` where `test`.`t1`.`b` = 'c' and `test`.`t1`.`a1` > 'a' and `test`.`t1`.`a2` > 'a'
 explain select count(distinct b) from t1 where (a2 >= 'b') and (b = 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	Using where; Using index
 explain extended select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	100.00	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	133	100.00	Using where; Using index for group-by
 Warnings:
 Note	1003	select 98 + count(distinct `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`) AS `98 + count(distinct a1,a2,b)` from `test`.`t1` where `test`.`t1`.`a1` > 'a' and `test`.`t1`.`a2` > 'a'
 select count(distinct a1,a2,b) from t1 where (a2 >= 'b') and (b = 'a');
@@ -2116,19 +2119,19 @@ select 98 + count(distinct a1,a2,b) from t1 where (a1 > 'a') and (a2 > 'a');
 104
 explain select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select concat(a1,min(c)),b from t1 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select concat(a1,min(c)),b,max(c) from t1 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select concat(a1,a2),b,min(c),max(c) from t1 where a1 < 'd' group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	147	NULL	133	Using where; Using index for group-by
 explain select concat(ord(min(b)),ord(max(b))),min(b),max(b) from t1 group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	126	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	147	NULL	9	Using index for group-by
 select a1,a2,b, concat(min(c), max(c)) from t1 where a1 < 'd' group by a1,a2,b;
 a1	a2	b	concat(min(c), max(c))
 a	a	a	a111d111
@@ -2197,83 +2200,83 @@ concat(ord(min(b)),ord(max(b)))	min(b)	max(b)
 9798	a	b
 explain select a1,a2,b,d,min(c),max(c) from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	
 explain select a1,a2,b,d from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	
 explain extended select a1,a2,min(b),max(b) from t1
 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	1000	100.00	Using where; Using index
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	128	100.00	Using where; Using index
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,min(`test`.`t1`.`b`) AS `min(b)`,max(`test`.`t1`.`b`) AS `max(b)` from `test`.`t1` where (`test`.`t1`.`a1` = 'b' or `test`.`t1`.`a1` = 'd' or `test`.`t1`.`a1` = 'a' or `test`.`t1`.`a1` = 'c') and `test`.`t1`.`a2` > 'a' and `test`.`t1`.`c` > 'a111' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`
 explain extended select a1,a2,b,min(c),max(c) from t1
 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	1000	100.00	Using where
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	128	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,min(`test`.`t1`.`c`) AS `min(c)`,max(`test`.`t1`.`c`) AS `max(c)` from `test`.`t1` where (`test`.`t1`.`a1` = 'b' or `test`.`t1`.`a1` = 'd' or `test`.`t1`.`a1` = 'a' or `test`.`t1`.`a1` = 'c') and `test`.`t1`.`a2` > 'a' and `test`.`t1`.`d` > 'xy2' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
 explain extended select a1,a2,b,c from t1
 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (d > 'xy2') group by a1,a2,b,c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	1000	100.00	Using where
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	128	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`a1` = 'b' or `test`.`t1`.`a1` = 'd' or `test`.`t1`.`a1` = 'a' or `test`.`t1`.`a1` = 'c') and `test`.`t1`.`a2` > 'a' and `test`.`t1`.`d` > 'xy2' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`,`test`.`t1`.`c`
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b < 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b < 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b <= 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b <= 'b' and b >= 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain extended select a1,a2,b from t1 where (a1 = 'b' or a1 = 'd' or a1 = 'a' or a1 = 'c') and (a2 > 'a') and (c > 'a111') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	1000	100.00	Using where; Using index
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	163	NULL	128	100.00	Using where; Using index
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a1` = 'b' or `test`.`t1`.`a1` = 'd' or `test`.`t1`.`a1` = 'a' or `test`.`t1`.`a1` = 'c') and `test`.`t1`.`a2` > 'a' and `test`.`t1`.`c` > 'a111' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
 explain select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 select a1,a2,min(b),c from t2 where (a2 = 'a') and (c = 'a111') group by a1;
 a1	a2	min(b)	c
 a	a	a	a111
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'b') or (b = 'a') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,min(c),max(c) from t2
 where (c > 'a000') and (c <= 'd999') and (c like '_8__') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1, a2, b, c, min(d), max(d) from t1 group by a1,a2,b,c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	1000	
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	
 explain select a1,a2,count(a2) from t1 group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	Using index
 explain extended select a1,a2,count(a2) from t1 where (a1 > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	1000	100.00	Using where; Using index
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	128	100.00	Using where; Using index
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,count(`test`.`t1`.`a2`) AS `count(a2)` from `test`.`t1` where `test`.`t1`.`a1` > 'a' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
 explain extended select sum(ord(a1)) from t1 where (a1 > 'a') group by a1,a2,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	1000	100.00	Using where; Using index
+1	SIMPLE	t1	index	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_2	147	NULL	128	100.00	Using where; Using index
 Warnings:
 Note	1003	select sum(ord(`test`.`t1`.`a1`)) AS `sum(ord(a1))` from `test`.`t1` where `test`.`t1`.`a1` > 'a' group by `test`.`t1`.`a1`,`test`.`t1`.`a2`,`test`.`t1`.`b`
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'a' or b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select a1,a2,b,max(c),min(c) from t2 where (a2 = 'a') and (b = 'a' or b = 'b') group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	Using where; Using index
 explain select distinct(a1) from t1 where ord(a2) = 98;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	1000	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_2	147	NULL	128	Using where; Using index
 select distinct(a1) from t1 where ord(a2) = 98;
 a1
 a
@@ -2282,7 +2285,7 @@ c
 d
 explain select a1 from t1 where a2 = 'b' group by a1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using where; Using index for group-by
 select a1 from t1 where a2 = 'b' group by a1;
 a1
 a
@@ -2291,7 +2294,7 @@ c
 d
 explain select distinct a1 from t1 where a2 = 'b';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	idx_t1_1	130	NULL	5	Using where; Using index for group-by
 select distinct a1 from t1 where a2 = 'b';
 a1
 a
@@ -2463,10 +2466,11 @@ CREATE TABLE t1 (a int, b int, PRIMARY KEY (a,b), KEY b (b)) engine=RocksDB;
 INSERT INTO t1 VALUES (1,1),(1,2),(1,0),(1,3);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 explain SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	PRIMARY,b	PRIMARY	8	NULL	501	Using where; Using index for group-by
+1	SIMPLE	t1	range	PRIMARY,b	PRIMARY	8	NULL	500	Using where; Using index for group-by
 SELECT MAX(b), a FROM t1 WHERE b < 2 AND a = 1 GROUP BY a;
 MAX(b)	a
 1	1
@@ -2477,10 +2481,11 @@ CREATE TABLE t2 (a int, b int, c int, PRIMARY KEY (a,b,c)) engine=RocksDB;
 INSERT INTO t2 SELECT a,b,b FROM t1;
 ANALYZE TABLE t2;
 Table	Op	Msg_type	Msg_text
+test.t2	analyze	status	Engine-independent statistics collected
 test.t2	analyze	status	OK
 explain SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	PRIMARY	PRIMARY	12	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t2	range	PRIMARY	PRIMARY	12	NULL	500	Using where; Using index for group-by
 SELECT MIN(c) FROM t2 WHERE b = 2 and a = 1 and c > 1 GROUP BY a;
 MIN(c)
 2
@@ -2490,10 +2495,11 @@ INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5),
 (2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	6	Using index for group-by
 FLUSH STATUS;
 SELECT max(b), a FROM t1 GROUP BY a;
 max(b)	a
@@ -2508,7 +2514,7 @@ Handler_read_next	0
 Handler_read_retry	0
 EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	6	Using index for group-by
 FLUSH STATUS;
 CREATE TABLE t2 engine=RocksDB SELECT max(b), a FROM t1 GROUP BY a;
 SHOW STATUS LIKE 'handler_read__e%';
@@ -2544,54 +2550,54 @@ Handler_read_retry	0
 EXPLAIN (SELECT max(b), a FROM t1 GROUP BY a) UNION 
 (SELECT max(b), a FROM t1 GROUP BY a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	range	NULL	a	5	NULL	251	Using index for group-by
-2	UNION	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1	range	NULL	a	5	NULL	6	Using index for group-by
+2	UNION	t1	range	NULL	a	5	NULL	6	Using index for group-by
 NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
 EXPLAIN SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
 FROM t1 AS t1_outer;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer	index	NULL	a	10	NULL	1000	Using index
-2	SUBQUERY	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer	index	NULL	a	10	NULL	15	Using index
+2	SUBQUERY	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS 
 (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer	index	NULL	a	10	NULL	1000	Using index
-2	SUBQUERY	t1	index	NULL	a	10	NULL	1000	Using index
+1	PRIMARY	t1_outer	index	NULL	a	10	NULL	15	Using index
+2	SUBQUERY	t1	index	NULL	a	10	NULL	15	Using index
 EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE 
 (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer	index	NULL	a	10	NULL	1000	Using index
-2	SUBQUERY	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer	index	NULL	a	10	NULL	15	Using index
+2	SUBQUERY	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE 
 a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	251	
-1	PRIMARY	t1_outer	ref	a	a	5	<subquery2>.max(b)	4	Using index
-2	MATERIALIZED	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer	index	a	a	10	NULL	15	Using where; Using index
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	test.t1_outer.a	1	
+2	MATERIALIZED	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING 
 a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer	range	NULL	a	5	NULL	251	Using index for group-by
-2	SUBQUERY	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer	range	NULL	a	5	NULL	6	Using index for group-by
+2	SUBQUERY	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 EXPLAIN SELECT 1 FROM t1 AS t1_outer1 JOIN t1 AS t1_outer2 
 ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) 
 AND t1_outer1.b = t1_outer2.b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer1	ref	a	a	5	const	4	Using where; Using index
-1	PRIMARY	t1_outer2	index	NULL	a	10	NULL	1000	Using where; Using index; Using join buffer (flat, BNL join)
-2	SUBQUERY	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer1	ref	a	a	5	const	3	Using where; Using index
+1	PRIMARY	t1_outer2	index	NULL	a	10	NULL	15	Using where; Using index; Using join buffer (flat, BNL join)
+2	SUBQUERY	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
 FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1_outer2	index	NULL	a	10	NULL	1000	Using index
-2	SUBQUERY	t1_outer	index	NULL	a	10	NULL	1000	Using index
-3	SUBQUERY	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	PRIMARY	t1_outer2	index	NULL	a	10	NULL	15	Using index
+2	SUBQUERY	t1_outer	index	NULL	a	10	NULL	15	Using index
+3	SUBQUERY	t1	range	a	a	5	NULL	400	Using where; Using index for group-by
 CREATE TABLE t3 LIKE t1;
 FLUSH STATUS;
 INSERT INTO t3 SELECT a,MAX(b) FROM t1 GROUP BY a;
 SHOW STATUS LIKE 'handler_read__e%';
 Variable_name	Value
-Handler_read_key	8
+Handler_read_key	13
 Handler_read_next	0
 Handler_read_retry	0
 DELETE FROM t3;
@@ -2626,10 +2632,11 @@ INSERT INTO t1 VALUES
 (4), (2), (1), (2), (2), (4), (1), (4);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN SELECT DISTINCT(a) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx	5	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx	5	NULL	4	Using index for group-by
 SELECT DISTINCT(a) FROM t1;
 a
 1
@@ -2637,7 +2644,7 @@ a
 4
 EXPLAIN SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	idx	5	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	idx	5	NULL	4	Using index for group-by
 SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
 a
 1
@@ -2650,11 +2657,12 @@ INSERT INTO t1 SELECT a + 1, b FROM t1;
 INSERT INTO t1 SELECT a + 2, b FROM t1;
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	Using temporary; Using filesort
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	12	Using temporary; Using filesort
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
 a	MIN(b)	MAX(b)
 4	1	3
@@ -2665,7 +2673,7 @@ CREATE INDEX break_it ON t1 (a, b);
 EXPLAIN
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	break_it	10	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	break_it	10	NULL	4	Using index for group-by
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
 a	MIN(b)	MAX(b)
 1	1	3
@@ -2675,7 +2683,7 @@ a	MIN(b)	MAX(b)
 EXPLAIN
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	break_it	10	NULL	251	Using index for group-by; Using temporary; Using filesort
+1	SIMPLE	t1	range	NULL	break_it	10	NULL	4	Using index for group-by; Using temporary; Using filesort
 SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
 a	MIN(b)	MAX(b)
 4	1	3
@@ -2685,7 +2693,7 @@ a	MIN(b)	MAX(b)
 EXPLAIN
 SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	break_it	10	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	break_it	10	NULL	12	Using index
 SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
 a	MIN(b)	MAX(b)	AVG(b)
 4	1	3	2.0000
@@ -2706,6 +2714,7 @@ insert into  t1 (a,b) values
 insert into t1 (a,b) select a, max(b)+1 from t1 where a = 0 group by a;
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 select * from t1;
 a	b
@@ -2768,7 +2777,7 @@ a	b
 3	13
 explain extended select sql_buffer_result a, max(b)+1 from t1 where a = 0 group by a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ref	PRIMARY,index	PRIMARY	4	const	15	100.00	Using index; Using temporary
+1	SIMPLE	t1	ref	PRIMARY,index	PRIMARY	4	const	15	6.67	Using index; Using temporary
 Warnings:
 Note	1003	select sql_buffer_result `test`.`t1`.`a` AS `a`,max(`test`.`t1`.`b`) + 1 AS `max(b)+1` from `test`.`t1` where `test`.`t1`.`a` = 0 group by `test`.`t1`.`a`
 drop table t1;
@@ -2780,10 +2789,11 @@ INSERT INTO t1 SELECT * FROM t1;
 INSERT INTO t1 SELECT a,b,c+1,d FROM t1;
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN SELECT DISTINCT c FROM t1 WHERE d=4;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	foo	10	NULL	63	Using where; Using index for group-by
+1	SIMPLE	t1	range	NULL	foo	10	NULL	3	Using where; Using index for group-by
 SELECT DISTINCT c FROM t1 WHERE d=4;
 c
 1
@@ -2799,13 +2809,14 @@ INSERT INTO t SELECT * FROM t;
 INSERT INTO t SELECT * FROM t;
 ANALYZE TABLE t;
 Table	Op	Msg_type	Msg_text
+test.t	analyze	status	Engine-independent statistics collected
 test.t	analyze	status	OK
 # test MIN
 #should use range with index for group by
 EXPLAIN
 SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	range	NULL	a	10	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t	range	NULL	a	10	NULL	2	Using where; Using index for group-by
 #should return 1 row
 SELECT a, MIN(b) FROM t WHERE b <> 0 GROUP BY a;
 a	MIN(b)
@@ -2815,7 +2826,7 @@ a	MIN(b)
 EXPLAIN
 SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	range	NULL	a	10	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t	range	NULL	a	10	NULL	2	Using where; Using index for group-by
 #should return 1 row
 SELECT a, MAX(b) FROM t WHERE b <> 1 GROUP BY a;
 a	MAX(b)
@@ -2826,7 +2837,7 @@ INSERT INTO t SELECT a, 2 FROM t;
 EXPLAIN
 SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	range	NULL	a	10	NULL	251	Using where; Using index for group-by
+1	SIMPLE	t	range	NULL	a	10	NULL	2	Using where; Using index for group-by
 #should return 1 row
 SELECT a, MAX(b) FROM t WHERE b > 0 AND b < 2 GROUP BY a;
 a	MAX(b)
@@ -2841,6 +2852,7 @@ INSERT INTO t VALUES (2,0), (2,0), (2,1), (2,1);
 INSERT INTO t SELECT * FROM t;
 ANALYZE TABLE t;
 Table	Op	Msg_type	Msg_text
+test.t	analyze	status	Engine-independent statistics collected
 test.t	analyze	status	OK
 SELECT a, MAX(b) FROM t WHERE 0=b+0 GROUP BY a;
 a	MAX(b)
@@ -2862,6 +2874,7 @@ CREATE TABLE t1(a INT NOT NULL, b INT NOT NULL, KEY (b)) engine=RocksDB;
 INSERT INTO t1 VALUES(1,1),(2,1);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 SELECT 1 AS c, b FROM t1 WHERE b IN (1,2) GROUP BY c, b;
 c	b
@@ -2880,6 +2893,7 @@ CREATE TABLE t1 ( a INT, KEY (a) ) engine=RocksDB;
 INSERT INTO t1 VALUES (1), (2), (3);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN
 SELECT MIN( a ) FROM t1 WHERE a = NULL;
@@ -2940,7 +2954,7 @@ NULL
 EXPLAIN
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-x	x	x	x	x	x	x	x	x	Using where; Using index
+x	x	x	x	x	x	x	x	x	Impossible WHERE noticed after reading const tables
 x	x	x	x	x	x	x	x	x	Using where; Using index
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 MIN( a )
@@ -2955,6 +2969,7 @@ NULL
 INSERT INTO t1 VALUES (NULL), (NULL);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN
 SELECT MIN( a ) FROM t1 WHERE a = NULL;
@@ -3015,7 +3030,7 @@ NULL
 EXPLAIN
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-x	x	x	x	x	x	x	x	x	Using where; Using index
+x	x	x	x	x	x	x	x	x	Impossible WHERE noticed after reading const tables
 x	x	x	x	x	x	x	x	x	Using where; Using index
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 MIN( a )
@@ -3033,6 +3048,7 @@ CREATE TABLE t1 ( a INT NOT NULL PRIMARY KEY) engine=RocksDB;
 INSERT INTO t1 VALUES (1), (2), (3);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 #
 # NULL-safe operator test disabled for non-NULL indexed columns.
@@ -3097,7 +3113,7 @@ NULL
 EXPLAIN
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-x	x	x	x	x	x	x	x	x	Using where; Using index
+x	x	x	x	x	x	x	x	x	Impossible WHERE noticed after reading const tables
 x	x	x	x	x	x	x	x	x	Using where; Using index
 SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0);
 MIN( a )
@@ -3133,6 +3149,7 @@ INSERT INTO t1 SELECT a, b + 4, 1 FROM t1;
 INSERT INTO t1 SELECT a + 1, b, 1 FROM t1;
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 CREATE TABLE t2 (a INT, b INT, c INT, d INT, e INT, f INT, KEY (a,b,c)) engine=RocksDB;
 INSERT INTO t2 VALUES (1,1,1,1,1,1), (1,2,1,1,1,1), (1,3,1,1,1,1), 
@@ -3141,48 +3158,49 @@ INSERT INTO t2 SELECT a, b + 4, c,d,e,f FROM t2;
 INSERT INTO t2 SELECT a + 1, b, c,d,e,f FROM t2;
 ANALYZE TABLE t2;
 Table	Op	Msg_type	Msg_text
+test.t2	analyze	status	Engine-independent statistics collected
 test.t2	analyze	status	OK
 EXPLAIN SELECT COUNT(DISTINCT a) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	3	Using index for group-by
 SELECT COUNT(DISTINCT a) FROM t1;
 COUNT(DISTINCT a)
 2
 EXPLAIN SELECT COUNT(DISTINCT a,b) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	10	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT a,b) FROM t1;
 COUNT(DISTINCT a,b)
 16
 EXPLAIN SELECT COUNT(DISTINCT b,a) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	10	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT b,a) FROM t1;
 COUNT(DISTINCT b,a)
 16
 EXPLAIN SELECT COUNT(DISTINCT b) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	a	10	NULL	16	Using index
 SELECT COUNT(DISTINCT b) FROM t1;
 COUNT(DISTINCT b)
 8
 EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	3	Using index for group-by
 SELECT COUNT(DISTINCT a) FROM t1 GROUP BY a;
 COUNT(DISTINCT a)
 1
 1
 EXPLAIN SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	10	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT b) FROM t1 GROUP BY a;
 COUNT(DISTINCT b)
 8
 8
 EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	a	10	NULL	1000	Using index; Using filesort
+1	SIMPLE	t1	index	NULL	a	10	NULL	16	Using index; Using filesort
 SELECT COUNT(DISTINCT a) FROM t1 GROUP BY b;
 COUNT(DISTINCT a)
 2
@@ -3195,94 +3213,94 @@ COUNT(DISTINCT a)
 2
 EXPLAIN SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	a	10	NULL	16	Using index
 SELECT DISTINCT COUNT(DISTINCT a) FROM t1;
 COUNT(DISTINCT a)
 2
 EXPLAIN SELECT COUNT(DISTINCT a, b + 0) FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	a	10	NULL	16	Using index
 SELECT COUNT(DISTINCT a, b + 0) FROM t1;
 COUNT(DISTINCT a, b + 0)
 16
 EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	a	10	NULL	16	Using index
 SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT b) < 10;
 COUNT(DISTINCT a)
 2
 EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	16	
 SELECT COUNT(DISTINCT a) FROM t1 HAVING COUNT(DISTINCT c) < 10;
 COUNT(DISTINCT a)
 2
 EXPLAIN SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	3	Using index for group-by
 SELECT 1 FROM t1 HAVING COUNT(DISTINCT a) < 10;
 1
 1
 EXPLAIN SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	10	NULL	501	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT 1 FROM t1 GROUP BY a HAVING COUNT(DISTINCT b) > 1;
 1
 1
 1
 EXPLAIN SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1_1	index	NULL	a	10	NULL	1000	Using index; Using temporary; Using filesort
-1	SIMPLE	t1_2	index	NULL	a	10	NULL	1000	Using index; Using join buffer (flat, BNL join)
+1	SIMPLE	t1_1	index	NULL	a	10	NULL	16	Using index; Using temporary; Using filesort
+1	SIMPLE	t1_2	index	NULL	a	10	NULL	16	Using index; Using join buffer (flat, BNL join)
 SELECT COUNT(DISTINCT t1_1.a) FROM t1 t1_1, t1 t1_2 GROUP BY t1_1.a;
 COUNT(DISTINCT t1_1.a)
 1
 1
 EXPLAIN SELECT COUNT(DISTINCT a), 12 FROM t1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	NULL	a	5	NULL	251	Using index for group-by
+1	SIMPLE	t1	range	NULL	a	5	NULL	3	Using index for group-by
 SELECT COUNT(DISTINCT a), 12 FROM t1;
 COUNT(DISTINCT a)	12
 2	12
 EXPLAIN SELECT COUNT(DISTINCT a, b, c) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	15	NULL	501	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	15	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT a, b, c) FROM t2;
 COUNT(DISTINCT a, b, c)
 16
 EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	5	NULL	126	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	5	NULL	3	Using index for group-by
 SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT a) FROM t2;
 COUNT(DISTINCT a)	SUM(DISTINCT a)	AVG(DISTINCT a)
 2	3	1.5000
 EXPLAIN SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	16	
 SELECT COUNT(DISTINCT a), SUM(DISTINCT a), AVG(DISTINCT f) FROM t2;
 COUNT(DISTINCT a)	SUM(DISTINCT a)	AVG(DISTINCT f)
 2	3	1.0000
 EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	10	NULL	251	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, a) FROM t2;
 COUNT(DISTINCT a, b)	COUNT(DISTINCT b, a)
 16	16
 EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	16	
 SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, f) FROM t2;
 COUNT(DISTINCT a, b)	COUNT(DISTINCT b, f)
 16	8
 EXPLAIN SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	16	
 SELECT COUNT(DISTINCT a, b), COUNT(DISTINCT b, d) FROM t2;
 COUNT(DISTINCT a, b)	COUNT(DISTINCT b, d)
 16	8
 EXPLAIN SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	15	NULL	501	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	15	NULL	17	Using index for group-by
 SELECT a, c, COUNT(DISTINCT c, a, b) FROM t2 GROUP BY a, b, c;
 a	c	COUNT(DISTINCT c, a, b)
 1	1	1
@@ -3304,7 +3322,7 @@ a	c	COUNT(DISTINCT c, a, b)
 EXPLAIN SELECT COUNT(DISTINCT c, a, b) FROM t2
 WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	a	a	15	NULL	501	Using where; Using index for group-by
+1	SIMPLE	t2	range	a	a	15	NULL	1062	Using where; Using index for group-by (scanning)
 SELECT COUNT(DISTINCT c, a, b) FROM t2
 WHERE a > 5 AND b BETWEEN 10 AND 20 GROUP BY a, b, c;
 COUNT(DISTINCT c, a, b)
@@ -3317,28 +3335,28 @@ GROUP BY b;
 COUNT(DISTINCT b)	SUM(DISTINCT b)
 EXPLAIN SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	10	NULL	251	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT a, COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
 a	COUNT(DISTINCT b)	SUM(DISTINCT b)
 1	8	36
 2	8	36
 EXPLAIN SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	10	NULL	251	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	10	NULL	17	Using index for group-by
 SELECT COUNT(DISTINCT b), SUM(DISTINCT b) FROM t2 GROUP BY a;
 COUNT(DISTINCT b)	SUM(DISTINCT b)
 8	36
 8	36
 EXPLAIN SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	Using where
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	16	Using where
 SELECT COUNT(DISTINCT a, b) FROM t2 WHERE c = 13 AND d = 42;
 COUNT(DISTINCT a, b)
 0
 EXPLAIN SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
 WHERE b = 13 AND c = 42 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	15	NULL	126	Using where; Using index for group-by
+1	SIMPLE	t2	range	NULL	a	15	NULL	3	Using where; Using index for group-by
 SELECT a, COUNT(DISTINCT a), SUM(DISTINCT a) FROM t2
 WHERE b = 13 AND c = 42 GROUP BY a;
 a	COUNT(DISTINCT a)	SUM(DISTINCT a)
@@ -3346,20 +3364,20 @@ a	COUNT(DISTINCT a)	SUM(DISTINCT a)
 # the second part of count(..) is defined by a constant predicate
 EXPLAIN SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	a	15	NULL	1000	Using where; Using index
+1	SIMPLE	t2	index	NULL	a	15	NULL	16	Using where; Using index
 SELECT COUNT(DISTINCT a, b), SUM(DISTINCT a) FROM t2 WHERE b = 42;
 COUNT(DISTINCT a, b)	SUM(DISTINCT a)
 0	NULL
 EXPLAIN SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	a	15	NULL	1000	Using index
+1	SIMPLE	t2	index	NULL	a	15	NULL	16	Using index
 SELECT SUM(DISTINCT a), MAX(b) FROM t2 GROUP BY a;
 SUM(DISTINCT a)	MAX(b)
 1	8
 2	8
 EXPLAIN SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	range	NULL	a	15	NULL	501	Using index for group-by
+1	SIMPLE	t2	range	NULL	a	15	NULL	17	Using index for group-by
 SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
 42 * (a + c + COUNT(DISTINCT c, a, b))
 126
@@ -3380,7 +3398,7 @@ SELECT 42 * (a + c + COUNT(DISTINCT c, a, b)) FROM t2 GROUP BY a, b, c;
 168
 EXPLAIN SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	index	NULL	a	15	NULL	1000	Using index
+1	SIMPLE	t2	index	NULL	a	15	NULL	16	Using index
 SELECT (SUM(DISTINCT a) + MAX(b)) FROM t2 GROUP BY a;
 (SUM(DISTINCT a) + MAX(b))
 9
@@ -3400,6 +3418,7 @@ insert into t1 values(1,'A'),(1 , 'B'), (1, 'C'), (2, 'A'),
 (3, 'A'), (3, 'B'), (3, 'C'), (3, 'D');
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
 f1	COUNT(DISTINCT f2)
@@ -3408,7 +3427,7 @@ f1	COUNT(DISTINCT f2)
 3	4
 explain SELECT f1, COUNT(DISTINCT f2) FROM t1 GROUP BY f1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	NULL	PRIMARY	5	NULL	1000	Using index
+1	SIMPLE	t1	index	NULL	PRIMARY	5	NULL	8	Using index
 drop table t1;
 # End of test#50539.
 #
@@ -3419,9 +3438,11 @@ CREATE TABLE t (a INT, b INT, KEY(a,b)) engine=RocksDB;
 INSERT INTO t VALUES (1,1), (2,2), (3,3), (4,4), (1,0), (3,2), (4,5);
 ANALYZE TABLE t;
 Table	Op	Msg_type	Msg_text
+test.t	analyze	status	Engine-independent statistics collected
 test.t	analyze	status	OK
 ANALYZE TABLE t;
 Table	Op	Msg_type	Msg_text
+test.t	analyze	status	Engine-independent statistics collected
 test.t	analyze	status	OK
 SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
 a	SUM(DISTINCT a)	MIN(b)
@@ -3431,7 +3452,7 @@ a	SUM(DISTINCT a)	MIN(b)
 4	4	4
 EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b) FROM t GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t	index	NULL	a	10	NULL	7	Using index
 SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
 a	SUM(DISTINCT a)	MAX(b)
 1	1	1
@@ -3440,7 +3461,7 @@ a	SUM(DISTINCT a)	MAX(b)
 4	4	5
 EXPLAIN SELECT a, SUM(DISTINCT a), MAX(b) FROM t GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t	index	NULL	a	10	NULL	7	Using index
 SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
 a	MAX(b)
 1	1
@@ -3449,13 +3470,13 @@ a	MAX(b)
 4	5
 EXPLAIN SELECT a, MAX(b) FROM t GROUP BY a HAVING SUM(DISTINCT a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t	index	NULL	a	10	NULL	7	Using index
 SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
 SUM(DISTINCT a)	MIN(b)	MAX(b)
 10	0	5
 EXPLAIN SELECT SUM(DISTINCT a), MIN(b), MAX(b) FROM t;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t	index	NULL	a	10	NULL	7	Using index
 SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
 a	SUM(DISTINCT a)	MIN(b)	MAX(b)
 1	1	0	1
@@ -3464,7 +3485,7 @@ a	SUM(DISTINCT a)	MIN(b)	MAX(b)
 4	4	4	5
 EXPLAIN SELECT a, SUM(DISTINCT a), MIN(b), MAX(b) FROM t GROUP BY a;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t	index	NULL	a	10	NULL	1000	Using index
+1	SIMPLE	t	index	NULL	a	10	NULL	7	Using index
 DROP TABLE t;
 #
 # Bug#18109609: LOOSE INDEX SCAN IS NOT USED WHEN IT SHOULD
@@ -3480,6 +3501,7 @@ INSERT INTO t1(c1,c2) VALUES
 (4,14), (4,15), (4,16), (4,17), (4,18), (4,19), (4,20),(5,5);
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
 test.t1	analyze	status	OK
 EXPLAIN SELECT MAX(c2), c1 FROM t1 WHERE c1 = 4 GROUP BY c1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra