MDEV-18608: Defaults for 10.4: histogram size should be set

Change the defaults:

-histogram_size=0
+histogram_size=254

-histogram_type=SINGLE_PREC_HB
+histogram_type=DOUBLE_PREC_HB

Adjust the testcases:
- Some have ignorable changes in EXPLAIN outputs and
  more counter increments due to EITS table reads.
- Testcases that meaningfully depend on the old defaults
  are changed to use the old values.

mysql-test/main/derived_cond_pushdown.result

@@ -15734,7 +15734,7 @@ explain extended select t2.a,t2.b,t2.c,t.c as t_c,t.max,t.min
 from t2, t3, (select c, max(b) max, min(b) min from t4 group by c) t
 where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	90	33.33	Using where
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	90	63.28	Using where
 1	PRIMARY	t3	ref	idx_a	idx_a	5	test.t2.a	1	100.00	Using where
 1	PRIMARY	<derived2>	ref	key0	key0	128	test.t3.c	10	100.00	
 2	DERIVED	t4	ALL	idx_c	NULL	NULL	NULL	160	100.00	Using temporary; Using filesort
@@ -15751,7 +15751,7 @@ EXPLAIN
       "table_name": "t2",
       "access_type": "ALL",
       "rows": 90,
-      "filtered": 33.333,
+      "filtered": 63.281,
       "attached_condition": "t2.b < 40 and t2.a is not null"
     },
     "table": {
@@ -16230,7 +16230,7 @@ explain extended select *
 from t2, t3, (select c, b, sum(b) over (partition by c) from t4 ) t
 where t2.b < 40 and t2.a=t3.a and t3.c=t.c;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	90	33.33	Using where
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	90	63.28	Using where
 1	PRIMARY	t3	ref	idx_a	idx_a	5	test.t2.a	1	100.00	Using where
 1	PRIMARY	<derived2>	ref	key0	key0	128	test.t3.c	10	100.00	
 2	DERIVED	t4	ALL	idx_c	NULL	NULL	NULL	160	100.00	Using temporary
@@ -16247,7 +16247,7 @@ EXPLAIN
       "table_name": "t2",
       "access_type": "ALL",
       "rows": 90,
-      "filtered": 33.333,
+      "filtered": 63.281,
       "attached_condition": "t2.b < 40 and t2.a is not null"
     },
     "table": {

mysql-test/main/group_min_max.result

@@ -1716,7 +1716,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	range	NULL	idx_t1_1	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	index	NULL	idx_t1_1	163	NULL	128	0.39	Using where; Using index
+1	SIMPLE	t1	index	NULL	idx_t1_1	163	NULL	128	0.38	Using where; Using index
 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');
@@ -1733,7 +1733,7 @@ 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
 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	index	NULL	idx_t2_1	163	NULL	164	0.28	Using where; Using index
+1	SIMPLE	t2	index	NULL	idx_t2_1	163	NULL	164	0.30	Using where; Using index
 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');
@@ -2078,19 +2078,19 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 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	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	77	100.00	Using where; Using index
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	77	99.22	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	ALL	idx_t1_0,idx_t1_1,idx_t1_2	NULL	NULL	NULL	128	40.10	Using where; Using temporary; Using filesort
+1	SIMPLE	t1	ALL	idx_t1_0,idx_t1_1,idx_t1_2	NULL	NULL	NULL	128	45.12	Using where; Using temporary; Using filesort
 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	ALL	idx_t1_0,idx_t1_1,idx_t1_2	NULL	NULL	NULL	128	40.10	Using where; Using temporary; Using filesort
+1	SIMPLE	t1	ALL	idx_t1_0,idx_t1_1,idx_t1_2	NULL	NULL	NULL	128	45.12	Using where; Using temporary; Using filesort
 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;
@@ -2098,7 +2098,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 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	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	77	100.00	Using where; Using index
+1	SIMPLE	t1	range	idx_t1_0,idx_t1_1,idx_t1_2	idx_t1_1	130	NULL	77	99.22	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;

mysql-test/main/join.result

@@ -1280,7 +1280,7 @@ pk	v	pk	v
 SHOW STATUS LIKE 'Handler_read_%';
 Variable_name	Value
 Handler_read_first	0
-Handler_read_key	11
+Handler_read_key	14
 Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0

mysql-test/main/join_outer.result

@@ -1803,7 +1803,7 @@ sum(t3.b)
 show status like "handler_read%";
 Variable_name	Value
 Handler_read_first	0
-Handler_read_key	10
+Handler_read_key	13
 Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
@@ -1818,7 +1818,7 @@ sum(t3.b)
 show status like "handler_read%";
 Variable_name	Value
 Handler_read_first	0
-Handler_read_key	6
+Handler_read_key	7
 Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
@@ -2552,7 +2552,7 @@ test.t3	analyze	status	OK
 explain extended select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	100.00	
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5) where 1
 # t3.filtered must less than 100%, too:
@@ -2560,7 +2560,7 @@ explain extended select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	100.00	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t3` join `test`.`t2`) on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5) where 1
 drop table t1,t2,t3;

mysql-test/main/join_outer_jcl6.result

@@ -1814,7 +1814,7 @@ sum(t3.b)
 show status like "handler_read%";
 Variable_name	Value
 Handler_read_first	0
-Handler_read_key	10
+Handler_read_key	13
 Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
@@ -1829,7 +1829,7 @@ sum(t3.b)
 show status like "handler_read%";
 Variable_name	Value
 Handler_read_first	0
-Handler_read_key	6
+Handler_read_key	7
 Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
@@ -2563,7 +2563,7 @@ test.t3	analyze	status	OK
 explain extended select * from t1 left join t3 on t1.a=t3.b and t3.a<5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	100.00	
-1	SIMPLE	t3	hash_ALL	NULL	#hash#$hj	5	test.t1.a	1000	0.99	Using where; Using join buffer (flat, BNLH join)
+1	SIMPLE	t3	hash_ALL	NULL	#hash#$hj	5	test.t1.a	1000	1.96	Using where; Using join buffer (flat, BNLH join)
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t3` on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5 and `test`.`t1`.`a` is not null) where 1
 # t3.filtered must less than 100%, too:
@@ -2571,7 +2571,7 @@ explain extended select * from t1 left join (t3 join t2) on t1.a=t3.b and t3.a<5
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	100.00	
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
-1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t3` join `test`.`t2`) on(`test`.`t3`.`b` = `test`.`t1`.`a` and `test`.`t3`.`a` < 5 and `test`.`t1`.`a` is not null) where 1
 drop table t1,t2,t3;

mysql-test/main/mysqld--help.result

@@ -1462,8 +1462,8 @@ gtid-ignore-duplicates FALSE
 gtid-pos-auto-engines 
 gtid-strict-mode FALSE
 help TRUE
-histogram-size 0
-histogram-type SINGLE_PREC_HB
+histogram-size 254
+histogram-type DOUBLE_PREC_HB
 host-cache-size 279
 idle-readonly-transaction-timeout 0
 idle-transaction-timeout 0

mysql-test/main/opt_trace.result

@@ -1324,11 +1324,11 @@ EXPLAIN SELECT MIN(d) FROM t1 where b=2 and c=3  group by a	{
                 "selectivity_for_columns": [
                   {
                     "column_name": "b",
-                    "selectivity_from_histograms": 0.1667
+                    "selectivity_from_histograms": 0.2891
                   },
                   {
                     "column_name": "c",
-                    "selectivity_from_histograms": 0.25
+                    "selectivity_from_histograms": 0.2891
                   }
                 ]
               }
@@ -1348,8 +1348,8 @@ EXPLAIN SELECT MIN(d) FROM t1 where b=2 and c=3  group by a	{
                   "considered_access_paths": [
                     {
                       "access_type": "scan",
-                      "resulting_rows": 0.2917,
-                      "cost": 3.3707,
+                      "resulting_rows": 0.5849,
+                      "cost": 3.3121,
                       "chosen": true,
                       "use_tmp_table": true
                     }
@@ -1374,7 +1374,7 @@ EXPLAIN SELECT MIN(d) FROM t1 where b=2 and c=3  group by a	{
             "reconsidering_access_paths_for_index_ordering": {
               "clause": "GROUP BY",
               "fanout": 1,
-              "read_time": 3.3717,
+              "read_time": 3.3131,
               "table": "t1",
               "rows_estimation": 7,
               "possible_keys": [
@@ -1957,11 +1957,11 @@ explain  select * from t1 where a=1 and b=2 order by c limit 1	{
                 "selectivity_for_columns": [
                   {
                     "column_name": "a",
-                    "selectivity_from_histograms": 0.0012
+                    "selectivity_from_histograms": 0.1797
                   },
                   {
                     "column_name": "b",
-                    "selectivity_from_histograms": 0.001
+                    "selectivity_from_histograms": 0.0156
                   }
                 ]
               }

mysql-test/main/order_by.result

@@ -3347,9 +3347,9 @@ filler2 char(255),
 key(a)
 );
 insert into t4 select a,a,a, a,a from t3;
-set @tmp_h=@@histogram_size, @tmp_u=@@use_stat_tables, 
+set @tmp_h=@@histogram_size, @tmp_ht=@@histogram_type, @tmp_u=@@use_stat_tables, 
 @tmp_o=@@optimizer_use_condition_selectivity;
-set histogram_size=100;
+set histogram_size=100, histogram_type='single_prec_hb';
 set use_stat_tables=preferably;
 set optimizer_use_condition_selectivity=4;
 analyze table t4 persistent for columns(b) indexes ();
@@ -3363,6 +3363,6 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	t4	index	NULL	a	5	NULL	1188	100.00	Using where
 Warnings:
 Note	1003	select `test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`c` AS `c`,`test`.`t4`.`filler1` AS `filler1`,`test`.`t4`.`filler2` AS `filler2` from `test`.`t4` where `test`.`t4`.`b` < 5000 order by `test`.`t4`.`a` limit 600
-set histogram_size=@tmp_h, use_stat_tables=@tmp_u,
+set histogram_size=@tmp_h, histogram_type=@tmp_ht, use_stat_tables=@tmp_u,
 optimizer_use_condition_selectivity=@tmp_o;
 drop table t1,t2,t3,t4;

mysql-test/main/order_by.test

@@ -2209,9 +2209,9 @@ create table t4 (
 );
 insert into t4 select a,a,a, a,a from t3;
 
-set @tmp_h=@@histogram_size, @tmp_u=@@use_stat_tables, 
+set @tmp_h=@@histogram_size, @tmp_ht=@@histogram_type, @tmp_u=@@use_stat_tables, 
     @tmp_o=@@optimizer_use_condition_selectivity; 
-set histogram_size=100;
+set histogram_size=100, histogram_type='single_prec_hb';
 set use_stat_tables=preferably;
 set optimizer_use_condition_selectivity=4;
 analyze table t4 persistent for columns(b) indexes ();
@@ -2220,7 +2220,7 @@ analyze table t4 persistent for columns(b) indexes ();
 explain extended 
 select * from t4 where b < 5000 order by a limit 600;
 
-set histogram_size=@tmp_h, use_stat_tables=@tmp_u,
+set histogram_size=@tmp_h, histogram_type=@tmp_ht, use_stat_tables=@tmp_u,
     optimizer_use_condition_selectivity=@tmp_o; 
 
 drop table t1,t2,t3,t4;

mysql-test/main/partition.result

@@ -2737,7 +2737,7 @@ id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	p1,p2	ALL	NULL	NULL	NULL	NULL	400	Using where
 explain extended select * from t2 where b=5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	19.80	Using where
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1000	19.61	Using where
 Warnings:
 Note	1003	select `test`.`t2`.`part_key` AS `part_key`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` = 5
 explain partitions select * from t2 where b=5;
@@ -2745,7 +2745,7 @@ id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	p0,p1,p2,p3,p4	ALL	NULL	NULL	NULL	NULL	1000	Using where
 explain extended select * from t2 partition(p0)  where b=1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	200	19.80	Using where
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	200	19.61	Using where
 Warnings:
 Note	1003	select `test`.`t2`.`part_key` AS `part_key`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` PARTITION (`p0`) where `test`.`t2`.`b` = 1
 set @@use_stat_tables= @save_use_stat_tables;

mysql-test/main/partition_explicit_prune.result

@@ -350,7 +350,7 @@ WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0;
 VARIABLE_NAME	VARIABLE_VALUE
 HANDLER_COMMIT	1
 HANDLER_READ_FIRST	1
-HANDLER_READ_KEY	6
+HANDLER_READ_KEY	8
 HANDLER_TMP_WRITE	24
 # Should be 1 commit
 # 4 locks (1 ha_partition + 1 ha_innobase) x 2 (lock/unlock)

mysql-test/main/selectivity.result

@@ -10,6 +10,8 @@ set use_stat_tables='preferably';
 set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
 set @save_histogram_size=@@histogram_size;
 set @save_histogram_type=@@histogram_type;
+set histogram_size=0;
+set histogram_type='single_prec_hb';
 set optimizer_use_condition_selectivity=3;
 create table t1 (a int);
 insert into t1 values
@@ -1369,14 +1371,14 @@ test.t2	analyze	status	Table is already up to date
 explain extended 
 select * from t1 straight_join t2 where t1.a=t2.a and t1.a<10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 1	SIMPLE	t2	ref	a	a	5	test.t1.a	10	100.00	
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10
 explain extended 
 select * from t1 straight_join t2 where t1.a=t2.a and t2.a<10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 1	SIMPLE	t2	ref	a	a	5	test.t1.a	10	100.00	
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10

mysql-test/main/selectivity.test

@@ -14,6 +14,8 @@ set use_stat_tables='preferably';
 set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
 set @save_histogram_size=@@histogram_size;
 set @save_histogram_type=@@histogram_type;
+set histogram_size=0;
+set histogram_type='single_prec_hb';
 
 # check that statistics on nulls is used
 

mysql-test/main/selectivity_innodb.result

@@ -13,6 +13,8 @@ set use_stat_tables='preferably';
 set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
 set @save_histogram_size=@@histogram_size;
 set @save_histogram_type=@@histogram_type;
+set histogram_size=0;
+set histogram_type='single_prec_hb';
 set optimizer_use_condition_selectivity=3;
 create table t1 (a int);
 insert into t1 values
@@ -1379,14 +1381,14 @@ test.t2	analyze	status	OK
 explain extended 
 select * from t1 straight_join t2 where t1.a=t2.a and t1.a<10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 1	SIMPLE	t2	ref	a	a	5	test.t1.a	10	100.00	
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10
 explain extended 
 select * from t1 straight_join t2 where t1.a=t2.a and t2.a<10;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	0.99	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1000	1.96	Using where
 1	SIMPLE	t2	ref	a	a	5	test.t1.a	10	100.00	
 Warnings:
 Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10

mysql-test/main/stat_tables.result

@@ -6,6 +6,8 @@ select @@session.use_stat_tables;
 COMPLEMENTARY
 set @save_use_stat_tables=@@use_stat_tables;
 set use_stat_tables='preferably';
+set @tmp_stt_hs=@@histogram_size, @tmp_stt_ht=@@histogram_type;
+set histogram_size=0, histogram_type='single_prec_hb';
 DROP DATABASE IF EXISTS dbt3_s001;
 CREATE DATABASE dbt3_s001;
 use dbt3_s001;
@@ -680,4 +682,5 @@ select * from t1 where a=1 and b=3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10.00	2.78	10.00	Using where
 drop table t1;
+set histogram_size=@tmp_stt_hs, histogram_type=@tmp_stt_ht;
 set use_stat_tables=@save_use_stat_tables;

mysql-test/main/stat_tables.test

@@ -6,6 +6,8 @@ select @@session.use_stat_tables;
 set @save_use_stat_tables=@@use_stat_tables;
 
 set use_stat_tables='preferably';
+set @tmp_stt_hs=@@histogram_size, @tmp_stt_ht=@@histogram_type;
+set histogram_size=0, histogram_type='single_prec_hb';
 
 --disable_warnings
 DROP DATABASE IF EXISTS dbt3_s001;
@@ -443,4 +445,5 @@ select * from mysql.column_stats;
 analyze
 select * from t1 where a=1 and b=3;
 drop table t1;
+set histogram_size=@tmp_stt_hs, histogram_type=@tmp_stt_ht;
 set use_stat_tables=@save_use_stat_tables;

mysql-test/main/stat_tables_innodb.result

@@ -14,6 +14,8 @@ select @@session.use_stat_tables;
 COMPLEMENTARY
 set @save_use_stat_tables=@@use_stat_tables;
 set use_stat_tables='preferably';
+set @tmp_stt_hs=@@histogram_size, @tmp_stt_ht=@@histogram_type;
+set histogram_size=0, histogram_type='single_prec_hb';
 DROP DATABASE IF EXISTS dbt3_s001;
 CREATE DATABASE dbt3_s001;
 use dbt3_s001;
@@ -712,6 +714,7 @@ select * from t1 where a=1 and b=3;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	10.00	2.78	10.00	Using where
 drop table t1;
+set histogram_size=@tmp_stt_hs, histogram_type=@tmp_stt_ht;
 set use_stat_tables=@save_use_stat_tables;
 set global innodb_stats_persistent= @innodb_stats_persistent_save;
 set global innodb_stats_persistent_sample_pages=

mysql-test/main/statistics.result

 drop table if exists t1,t2;
 set @save_use_stat_tables=@@use_stat_tables;
+set @save_hist_size=@@histogram_size, @save_hist_type=@@histogram_type;
+set histogram_size=0, histogram_type='single_prec_hb';
 DELETE FROM mysql.table_stats;
 DELETE FROM mysql.column_stats;
 DELETE FROM mysql.index_stats;
@@ -246,7 +248,7 @@ test	t1	e	0.01	0.112	0.2250	6.2000	8	DOUBLE_PREC_HB	000005056464E1E1
 test	t1	f	1	5	0.2000	6.4000	8	DOUBLE_PREC_HB	FF3FFF7FFFBFFFBF
 DELETE FROM mysql.column_stats;
 set histogram_size= 0;
-set histogram_type=default;
+set histogram_type='single_prec_hb';
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	Engine-independent statistics collected
@@ -1504,8 +1506,8 @@ hist_size	254
 hist_type	DOUBLE_PREC_HB
 hex(histogram)	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
 decode_histogram(hist_type,histogram)	0.00047,0.00198,0.00601,0.00008,0.00008,0.00005,0.00011,0.00006,0.00009,0.00008,0.00006,0.00009,0.00008,0.00009,0.00008,0.00009,0.00006,0.00006,0.00008,0.00008,0.00008,0.00011,0.00009,0.00008,0.00009,0.00006,0.00011,0.00006,0.00012,0.00012,0.00012,0.00012,0.00011,0.00011,0.00014,0.00011,0.00011,0.00011,0.00014,0.00006,0.00011,0.00009,0.00011,0.00009,0.00015,0.00015,0.00015,0.00009,0.00018,0.00015,0.00015,0.00015,0.00017,0.00018,0.00018,0.00015,0.00018,0.00020,0.00024,0.00021,0.00023,0.00027,0.00024,0.00024,0.00027,0.00023,0.00020,0.00029,0.00020,0.00027,0.00020,0.00027,0.00026,0.00034,0.00024,0.00034,0.00031,0.00037,0.00043,0.00038,0.00038,0.00035,0.00047,0.00056,0.00058,0.00041,0.00047,0.00056,0.00072,0.00044,0.00060,0.00072,0.00061,0.00072,0.00066,0.00085,0.00075,0.00078,0.00082,0.00073,0.00108,0.00089,0.00105,0.00105,0.00151,0.00150,0.00110,0.00145,0.00163,0.00160,0.00165,0.00232,0.00201,0.00371,0.00365,0.00383,0.00459,0.00583,0.00662,0.00984,0.00969,0.01080,0.01379,0.02063,0.04308,0.05960,0.15816,0.59464
-set histogram_type=default;
-set histogram_size=default;
+set histogram_type='single_prec_hb';
+set histogram_size=0;
 use test;
 DROP DATABASE world;
 SELECT UPPER(db_name), UPPER(table_name), cardinality
@@ -1600,8 +1602,8 @@ hist_size, hist_type, HEX(histogram)
 FROM mysql.column_stats;
 db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_frequency	hist_size	hist_type	HEX(histogram)
 test	t1	a	1	5	0.0000	1.0000	10	DOUBLE_PREC_HB	0000FF3FFF7FFFBFFFFF
-set histogram_size=default;
-set histogram_type=default;
+set histogram_size=0;
+set histogram_type='single_prec_hb';
 drop table t1;
 #
 # Bug mdev-4369: histogram for a column with many distinct values 
@@ -1641,7 +1643,7 @@ hist_size, hist_type, HEX(histogram)
 FROM mysql.column_stats;
 db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_frequency	hist_size	hist_type	HEX(histogram)
 test	t2	id	1	1024	0.0000	8.0000	63	SINGLE_PREC_HB	03070B0F13171B1F23272B2F33373B3F43474B4F53575B5F63676B6F73777B7F83878B8F93979B9FA3A7ABAFB3B7BBBFC3C7CBCFD3D7DBDFE3E7EBEFF3F7FB
-set histogram_size=default;
+set histogram_size=0;
 drop table t1, t2;
 set use_stat_tables=@save_use_stat_tables;
 #
@@ -1757,3 +1759,4 @@ DROP TABLE t1;
 #
 # End of 10.2 tests
 #
+set histogram_size=@save_hist_size, histogram_type=@save_hist_type;

mysql-test/main/statistics.test

@@ -5,7 +5,8 @@ drop table if exists t1,t2;
 --enable_warnings
 
 set @save_use_stat_tables=@@use_stat_tables;
-
+set @save_hist_size=@@histogram_size, @save_hist_type=@@histogram_type;
+set histogram_size=0, histogram_type='single_prec_hb';
 DELETE FROM mysql.table_stats;
 --sorted_result
 DELETE FROM mysql.column_stats;
@@ -196,7 +197,7 @@ SELECT db_name, table_name, column_name,
 DELETE FROM mysql.column_stats;
 
 set histogram_size= 0;
-set histogram_type=default;
+set histogram_type='single_prec_hb';
 ANALYZE TABLE t1;
 
 
@@ -657,8 +658,8 @@ FLUSH TABLES;
 --query_vertical select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='COUNTRYLANGUAGE' and UPPER(column_name) = 'PERCENTAGE';
 --query_vertical select UPPER(db_name),UPPER(table_name),UPPER(column_name),min_value,max_value,nulls_ratio,avg_length,avg_frequency,hist_size,hist_type,hex(histogram),decode_histogram(hist_type,histogram) from mysql.column_stats where UPPER(db_name)='WORLD' and UPPER(table_name)='CITY' and UPPER(column_name) = 'POPULATION';
 
-set histogram_type=default;
-set histogram_size=default;
+set histogram_type='single_prec_hb';
+set histogram_size=0;
 
 use test;
 DROP DATABASE world;
@@ -732,8 +733,8 @@ select db_name, table_name, column_name,
        hist_size, hist_type, HEX(histogram)
   FROM mysql.column_stats;
 
-set histogram_size=default;
-set histogram_type=default;
+set histogram_size=0;
+set histogram_type='single_prec_hb';
 
 drop table t1;
 
@@ -776,7 +777,7 @@ select db_name, table_name, column_name,
        hist_size, hist_type, HEX(histogram)
   FROM mysql.column_stats;
 
-set histogram_size=default;
+set histogram_size=0;
 
 drop table t1, t2;
 
@@ -898,3 +899,5 @@ DROP TABLE t1;
 --echo #
 --echo # End of 10.2 tests
 --echo #
+set histogram_size=@save_hist_size, histogram_type=@save_hist_type;
+

mysql-test/main/subselect_mat.result

@@ -62,7 +62,7 @@ explain extended
 select * from t1 where a1 in (select b1 from t2 where b1 > '0');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1` from `test`.`t2` where `test`.`t2`.`b1` > '0' ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery2>`.`b1`))))
 select * from t1 where a1 in (select b1 from t2 where b1 > '0');
@@ -73,7 +73,7 @@ explain extended
 select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1` from `test`.`t2` where `test`.`t2`.`b1` > '0' ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery2>`.`b1`))))
 select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
@@ -84,7 +84,7 @@ explain extended
 select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` > '0' ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery2>`.`b1` and `test`.`t1`.`a2` = `<subquery2>`.`b2`))))
 select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
@@ -95,7 +95,7 @@ explain extended
 select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using temporary
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where; Using temporary
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where `test`.`t2`.`b1` > '0' group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery2>`.`b1` and `test`.`t1`.`a2` = `<subquery2>`.`min(b2)`))))
 select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
@@ -322,7 +322,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 4	MATERIALIZED	t2i	index	it2i2	it2i3	18	NULL	5	100.00	Using where; Using index
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#2 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` > '0' ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery2>`.`b1` and `test`.`t1`.`a2` = `<subquery2>`.`b2`)))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#3 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`,`test`.`t3`.`c2`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#4 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where `test`.`t2i`.`b2` > '0' ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where `test`.`t3`.`c1` = `<subquery4>`.`b1` and `test`.`t3`.`c2` = `<subquery4>`.`b2`)))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery3>`.`c1` and `test`.`t1`.`a2` = `<subquery3>`.`c2`))))
 select * from t1
@@ -452,8 +452,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 5	MATERIALIZED	t2i	index	it2i2	it2i3	18	NULL	5	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (/* select#4 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`,`test`.`t3`.`c2`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#5 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where `test`.`t2i`.`b2` > '0' ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where `test`.`t3`.`c1` = `<subquery5>`.`b1` and `test`.`t3`.`c2` = `<subquery5>`.`b2`)))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where `test`.`t1`.`a1` = `<subquery4>`.`c1` and `test`.`t1`.`a2` = `<subquery4>`.`c2`))))
@@ -475,8 +475,8 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (flat, BNL join)
 4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 5	MATERIALIZED	t2i	index	it2i2	it2i3	18	NULL	5	100.00	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`c1` = `test`.`t1`.`a1` and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and <expr_cache><`test`.`t3`.`c1`,`test`.`t3`.`c2`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#4 */ select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`,`test`.`t3`.`c2`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (/* select#5 */ select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where `test`.`t2i`.`b2` > '0' ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where `test`.`t3`.`c1` = `<subquery5>`.`b1` and `test`.`t3`.`c2` = `<subquery5>`.`b2`)))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where `test`.`t3`.`c1` = `<subquery4>`.`c1` and `test`.`t3`.`c2` = `<subquery4>`.`c2`))))
@@ -497,8 +497,8 @@ select * from t3
 where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(/* select#2 */ select `test`.`t1`.`a1` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1` union /* select#3 */ select `test`.`t2`.`b1` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`)))
@@ -712,7 +712,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 2	DEPENDENT SUBQUERY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 3	DEPENDENT SUBQUERY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 3	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (flat, BNL join)
-4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><concat(`test`.`t1`.`a1`,'x')>(<in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(/* select#2 */ select left(`test`.`t1_16`.`a1`,8) from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(/* select#3 */ select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where `test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6) and <expr_cache><`test`.`t2`.`b1`>(<in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (/* select#4 */ select `test`.`t3`.`c1` from `test`.`t3` where `test`.`t3`.`c2` > '0' ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where `test`.`t2`.`b1` = `<subquery4>`.`c1`)))) and <cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1` and <cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`))) and <cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8))))
 drop table t1_16, t2_16, t3_16;

mysql-test/main/subselect_sj_mat.result

@@ -60,9 +60,9 @@ set @@optimizer_switch='materialization=on,in_to_exists=off,firstmatch=off';
 explain extended
 select * from t1 where a1 in (select b1 from t2 where b1 > '0');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func	1	100.00	
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0'
 select * from t1 where a1 in (select b1 from t2 where b1 > '0');
@@ -72,9 +72,9 @@ a1	a2
 explain extended
 select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	8	func	1	100.00	
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0'
 select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1);
@@ -84,9 +84,9 @@ a1	a2
 explain extended
 select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t2`.`b1` > '0'
 select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2);
@@ -98,7 +98,7 @@ select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' gr
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	test.t1.a1,test.t1.a2	1	100.00	
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using temporary
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where; Using temporary
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from  <materialize> (/* select#2 */ select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where `test`.`t2`.`b1` > '0' group by `test`.`t2`.`b1`) join `test`.`t1` where `<subquery2>`.`b1` = `test`.`t1`.`a1` and `<subquery2>`.`min(b2)` = `test`.`t1`.`a2`
 select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1);
@@ -331,12 +331,12 @@ where (a1, a2) in (select b1, b2 from t2 where b1 >  '0') and
 (a1, a2) in (select c1, c2 from t3
 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	98.44	
 1	PRIMARY	<subquery3>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
-3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	98.44	Using where
 3	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t3.c1,test.t3.c2	1	100.00	Using index
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	98.44	Using where
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and `test`.`t2`.`b1` > '0' and `test`.`t3`.`c2` > '0'
 select * from t1
@@ -373,12 +373,12 @@ b2 in (select c2 from t3 where c2 LIKE '%03')) and
 (a1, a2) in (select c1, c2 from t3
 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	
 1	PRIMARY	<subquery5>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
-5	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+5	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where
 5	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t3.c1,test.t3.c2	1	100.00	Using index
-2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 3	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 Warnings:
@@ -399,10 +399,10 @@ b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and
 (a1, a2) in (select c1, c2 from t3 t3c
 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	
 1	PRIMARY	<subquery5>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
-5	MATERIALIZED	t3c	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
+5	MATERIALIZED	t3c	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where
 5	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t3c.c1,test.t3c.c2	1	100.00	Using index
 4	MATERIALIZED	t3b	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
 3	DEPENDENT SUBQUERY	t3a	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
@@ -432,12 +432,12 @@ where (a1, a2) in (select b1, b2 from t2i where b1 >  '0') and
 (a1, a2) in (select c1, c2 from t3i
 where (c1, c2) in (select b1, b2 from t2i where b2 > '0')));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	#	#	#	3	100.00	#
+1	PRIMARY	t1	ALL	NULL	#	#	#	3	99.22	#
 1	PRIMARY	<subquery5>	eq_ref	distinct_key	#	#	#	1	100.00	#
 1	PRIMARY	<subquery2>	eq_ref	distinct_key	#	#	#	1	100.00	#
-5	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
+5	MATERIALIZED	t3	ALL	NULL	#	#	#	4	99.22	#
 5	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	#	#	#	1	100.00	#
-2	MATERIALIZED	t2	ALL	NULL	#	#	#	5	100.00	#
+2	MATERIALIZED	t2	ALL	NULL	#	#	#	5	99.22	#
 4	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
 3	MATERIALIZED	t3	ALL	NULL	#	#	#	4	100.00	#
 7	UNION	t2i	index	it2i1,it2i2,it2i3	#	#	#	5	50.00	#
@@ -468,12 +468,12 @@ where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where
 (a1, a2) in (select c1, c2 from t3
 where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
-1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
 1	PRIMARY	<subquery4>	eq_ref	distinct_key	distinct_key	16	func,func	1	100.00	
-4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where
 4	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t3.c1,test.t3.c2	1	100.00	Using index
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) where `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and `test`.`t3`.`c2` > '0'
@@ -493,11 +493,11 @@ a1 = c1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
 1	PRIMARY	<subquery4>	ALL	distinct_key	NULL	NULL	NULL	4	100.00	Using where
-1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (flat, BNL join)
-4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where; Using join buffer (flat, BNL join)
+4	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where
 4	MATERIALIZED	t2i	ref	it2i1,it2i2,it2i3	it2i3	18	test.t3.c1,test.t3.c2	1	100.00	Using index
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) join `test`.`t3` where `test`.`t3`.`c1` = `test`.`t1`.`a1` and `test`.`t2i`.`b1` = `test`.`t3`.`c1` and `test`.`t3`.`c1` = `test`.`t1`.`a1` and `test`.`t2i`.`b2` = `test`.`t3`.`c2` and `test`.`t3`.`c2` = `test`.`t3`.`c2` and <expr_cache><`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(/* select#2 */ select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1` and <cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2` union /* select#3 */ select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1` and <cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))) and `test`.`t3`.`c2` > '0'
@@ -518,8 +518,8 @@ select * from t3
 where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9');
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
-2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
-3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	3	99.22	Using where
+3	DEPENDENT UNION	t2	ALL	NULL	NULL	NULL	NULL	5	99.22	Using where
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
 Warnings:
 Note	1003	/* select#1 */ select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(/* select#2 */ select `test`.`t1`.`a1` from `test`.`t1` where `test`.`t1`.`a1` > '0' and <cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1` union /* select#3 */ select `test`.`t2`.`b1` from `test`.`t2` where `test`.`t2`.`b1` < '9' and <cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`)))
@@ -734,7 +734,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	100.00	
 1	PRIMARY	t1_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Start temporary; Using join buffer (flat, BNL join)
 1	PRIMARY	t2_16	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
-1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where; Using join buffer (flat, BNL join)
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	4	99.22	Using where; Using join buffer (flat, BNL join)
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; End temporary; Using join buffer (flat, BNL join)
 Warnings:
 Note	1003	select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t3` join `test`.`t2_16` join `test`.`t2` join `test`.`t1_16`) where `test`.`t2`.`b1` = `test`.`t3`.`c1` and `test`.`t2_16`.`b1` = `test`.`t1_16`.`a1` and `test`.`t2_16`.`b2` = `test`.`t1_16`.`a2` and `test`.`t2`.`b2` = substr(`test`.`t1_16`.`a2`,1,6) and `test`.`t3`.`c2` > '0' and concat(`test`.`t1`.`a1`,'x') = left(`test`.`t1_16`.`a1`,8)

mysql-test/suite/sys_vars/r/histogram_size_basic.result

 SET @start_global_value = @@global.histogram_size;
 SELECT @start_global_value;
 @start_global_value
-0
+254
 SET @start_session_value = @@session.histogram_size;
 SELECT @start_session_value;
 @start_session_value
-0
+254
 '#--------------------FN_DYNVARS_053_01-------------------------#'
 SET @@global.histogram_size = DEFAULT;
 SELECT @@global.histogram_size;
 @@global.histogram_size
-0
+254
 SET @@session.histogram_size = DEFAULT;
 SELECT @@session.histogram_size;
 @@session.histogram_size
-0
+254
 '#--------------------FN_DYNVARS_053_03-------------------------#'
 SET @@global.histogram_size = 1;
 SELECT @@global.histogram_size;
@@ -129,8 +129,8 @@ SELECT @@local.histogram_size = @@session.histogram_size;
 SET @@global.histogram_size = @start_global_value;
 SELECT @@global.histogram_size;
 @@global.histogram_size
-0
+254
 SET @@session.histogram_size = @start_session_value;
 SELECT @@session.histogram_size;
 @@session.histogram_size
-0
+254

mysql-test/suite/sys_vars/r/histogram_type_basic.result

 SET @start_global_value = @@global.histogram_type;
 SELECT @start_global_value;
 @start_global_value
-SINGLE_PREC_HB
+DOUBLE_PREC_HB
 SET @start_session_value = @@session.histogram_type;
 SELECT @start_session_value;
 @start_session_value
-SINGLE_PREC_HB
+DOUBLE_PREC_HB
 SET @@global.histogram_type = 1;
 SET @@global.histogram_type = DEFAULT;
 SELECT @@global.histogram_type;
 @@global.histogram_type
-SINGLE_PREC_HB
+DOUBLE_PREC_HB
 SET @@global.histogram_type = 0;
 SELECT @@global.histogram_type;
 @@global.histogram_type
@@ -71,9 +71,9 @@ HISTOGRAM_TYPE	DOUBLE_PREC_HB
 SET @@global.histogram_type = @start_global_value;
 SELECT @@global.histogram_type;
 @@global.histogram_type
-SINGLE_PREC_HB
+DOUBLE_PREC_HB
 SET @@session.histogram_type = @start_session_value;
 SELECT @@session.histogram_type;
 @@session.histogram_type
-SINGLE_PREC_HB
+DOUBLE_PREC_HB
 set sql_mode='';

mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result

@@ -1427,10 +1427,10 @@ ENUM_VALUE_LIST	NULL
 READ_ONLY	YES
 COMMAND_LINE_ARGUMENT	NULL
 VARIABLE_NAME	HISTOGRAM_SIZE
-SESSION_VALUE	0
-GLOBAL_VALUE	0
+SESSION_VALUE	254
+GLOBAL_VALUE	254
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
-DEFAULT_VALUE	0
+DEFAULT_VALUE	254
 VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	BIGINT UNSIGNED
 VARIABLE_COMMENT	Number of bytes used for a histogram. If set to 0, no histograms are created by ANALYZE.
@@ -1441,10 +1441,10 @@ ENUM_VALUE_LIST	NULL
 READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	REQUIRED
 VARIABLE_NAME	HISTOGRAM_TYPE
-SESSION_VALUE	SINGLE_PREC_HB
-GLOBAL_VALUE	SINGLE_PREC_HB
+SESSION_VALUE	DOUBLE_PREC_HB
+GLOBAL_VALUE	DOUBLE_PREC_HB
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
-DEFAULT_VALUE	SINGLE_PREC_HB
+DEFAULT_VALUE	DOUBLE_PREC_HB
 VARIABLE_SCOPE	SESSION
 VARIABLE_TYPE	ENUM
 VARIABLE_COMMENT	Specifies type of the histograms created by ANALYZE. Possible values are: SINGLE_PREC_HB - single precision height-balanced, DOUBLE_PREC_HB - double precision height-balanced.

sql/sys_vars.cc

@@ -5936,7 +5936,7 @@ static Sys_var_ulong Sys_histogram_size(
        "Number of bytes used for a histogram. "
        "If set to 0, no histograms are created by ANALYZE.",
        SESSION_VAR(histogram_size), CMD_LINE(REQUIRED_ARG),
-       VALID_RANGE(0, 255), DEFAULT(0), BLOCK_SIZE(1));
+       VALID_RANGE(0, 255), DEFAULT(254), BLOCK_SIZE(1));
 
 extern const char *histogram_types[];
 static Sys_var_enum Sys_histogram_type(
@@ -5946,7 +5946,7 @@ static Sys_var_enum Sys_histogram_type(
        "SINGLE_PREC_HB - single precision height-balanced, "
        "DOUBLE_PREC_HB - double precision height-balanced.",
        SESSION_VAR(histogram_type), CMD_LINE(REQUIRED_ARG),
-       histogram_types, DEFAULT(0));
+       histogram_types, DEFAULT(1));
 
 static Sys_var_mybool Sys_no_thread_alarm(
        "debug_no_thread_alarm",