drop table if exists t0,t1,t2,t3;
select @@global.use_stat_tables;
@@global.use_stat_tables
COMPLEMENTARY
select @@session.use_stat_tables;
@@session.use_stat_tables
COMPLEMENTARY
set @save_use_stat_tables=@@use_stat_tables;
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 optimizer_use_condition_selectivity=3;
create table t1 (a int);
insert into t1 values
(9), (3), (2), (NULL), (NULL), (2), (NULL), (1), (5), (NULL);
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
select * from mysql.column_stats;
db_name	table_name	column_name	min_value	max_value	nulls_ratio	avg_length	avg_frequency	hist_size	hist_type	histogram
test	t1	a	1	9	0.4000	4.0000	1.2000	0	NULL	NULL
flush table t1;
explain extended 
select * from t1 where a is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	40.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where isnull(`test`.`t1`.`a`)
explain extended 
select * from t1 where a is not null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	60.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` is not null)
drop table t1;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP DATABASE IF EXISTS dbt3_s001;
CREATE DATABASE dbt3_s001;
use dbt3_s001;
=== Q2 ===
set optimizer_use_condition_selectivity=5;
explain extended
select
s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment
from
part, supplier, partsupp, nation, region
where
p_partkey = ps_partkey
and s_suppkey = ps_suppkey
and p_size = 9
and p_type like '%TIN'
	and s_nationkey = n_nationkey
and n_regionkey = r_regionkey
and r_name = 'ASIA'
	and ps_supplycost = (
select
min(ps_supplycost)
from
partsupp, supplier, nation, region
where
p_partkey = ps_partkey
and s_suppkey = ps_suppkey
and s_nationkey = n_nationkey
and n_regionkey = r_regionkey
and r_name = 'ASIA'
	)
order by
s_acctbal desc, n_name, s_name, p_partkey;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	0.31	Using where; Using temporary; Using filesort
1	PRIMARY	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	Using where
1	PRIMARY	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.partsupp.ps_suppkey	1	100.00	Using where
1	PRIMARY	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	100.00	Using where
1	PRIMARY	region	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.nation.n_regionkey	1	20.00	Using where
2	DEPENDENT SUBQUERY	region	ALL	PRIMARY	NULL	NULL	NULL	5	20.00	Using where
2	DEPENDENT SUBQUERY	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	
2	DEPENDENT SUBQUERY	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.partsupp.ps_suppkey	1	100.00	Using where
2	DEPENDENT SUBQUERY	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	100.00	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.part.p_partkey' of SELECT #2 was resolved in SELECT #1
Note	1003	select `dbt3_s001`.`supplier`.`s_acctbal` AS `s_acctbal`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`nation`.`n_name` AS `n_name`,`dbt3_s001`.`part`.`p_partkey` AS `p_partkey`,`dbt3_s001`.`part`.`p_mfgr` AS `p_mfgr`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`dbt3_s001`.`supplier`.`s_comment` AS `s_comment` from `dbt3_s001`.`part` join `dbt3_s001`.`supplier` join `dbt3_s001`.`partsupp` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where ((`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`part`.`p_size` = 9) and (`dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey`) and (`dbt3_s001`.`region`.`r_regionkey` = `dbt3_s001`.`nation`.`n_regionkey`) and (`dbt3_s001`.`region`.`r_name` = 'ASIA') and (`dbt3_s001`.`part`.`p_type` like '%TIN') and (`dbt3_s001`.`partsupp`.`ps_supplycost` = <expr_cache><`dbt3_s001`.`part`.`p_partkey`>((select min(`dbt3_s001`.`partsupp`.`ps_supplycost`) from `dbt3_s001`.`partsupp` join `dbt3_s001`.`supplier` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where ((`dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey`) and (`dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey`) and (`dbt3_s001`.`region`.`r_name` = 'ASIA') and (`dbt3_s001`.`part`.`p_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`)))))) order by `dbt3_s001`.`supplier`.`s_acctbal` desc,`dbt3_s001`.`nation`.`n_name`,`dbt3_s001`.`supplier`.`s_name`,`dbt3_s001`.`part`.`p_partkey`
set optimizer_use_condition_selectivity=4;
explain extended
select
s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment
from
part, supplier, partsupp, nation, region
where
p_partkey = ps_partkey
and s_suppkey = ps_suppkey
and p_size = 9
and p_type like '%TIN'
	and s_nationkey = n_nationkey
and n_regionkey = r_regionkey
and r_name = 'ASIA'
	and ps_supplycost = (
select
min(ps_supplycost)
from
partsupp, supplier, nation, region
where
p_partkey = ps_partkey
and s_suppkey = ps_suppkey
and s_nationkey = n_nationkey
and n_regionkey = r_regionkey
and r_name = 'ASIA'
	)
order by
s_acctbal desc, n_name, s_name, p_partkey;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	region	ALL	PRIMARY	NULL	NULL	NULL	5	20.00	Using where; Using temporary; Using filesort
1	PRIMARY	nation	ref	PRIMARY,i_n_regionkey	i_n_regionkey	5	dbt3_s001.region.r_regionkey	5	100.00	
1	PRIMARY	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.nation.n_nationkey	1	100.00	
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	2.08	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	partsupp	eq_ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	8	dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey	1	100.00	Using where
2	DEPENDENT SUBQUERY	region	ALL	PRIMARY	NULL	NULL	NULL	5	20.00	Using where
2	DEPENDENT SUBQUERY	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	
2	DEPENDENT SUBQUERY	supplier	eq_ref	PRIMARY,i_s_nationkey	PRIMARY	4	dbt3_s001.partsupp.ps_suppkey	1	100.00	Using where
2	DEPENDENT SUBQUERY	nation	eq_ref	PRIMARY,i_n_regionkey	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	100.00	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.part.p_partkey' of SELECT #2 was resolved in SELECT #1
Note	1003	select `dbt3_s001`.`supplier`.`s_acctbal` AS `s_acctbal`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`nation`.`n_name` AS `n_name`,`dbt3_s001`.`part`.`p_partkey` AS `p_partkey`,`dbt3_s001`.`part`.`p_mfgr` AS `p_mfgr`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`dbt3_s001`.`supplier`.`s_comment` AS `s_comment` from `dbt3_s001`.`part` join `dbt3_s001`.`supplier` join `dbt3_s001`.`partsupp` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where ((`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`dbt3_s001`.`part`.`p_size` = 9) and (`dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey`) and (`dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey`) and (`dbt3_s001`.`region`.`r_name` = 'ASIA') and (`dbt3_s001`.`part`.`p_type` like '%TIN') and (`dbt3_s001`.`partsupp`.`ps_supplycost` = <expr_cache><`dbt3_s001`.`part`.`p_partkey`>((select min(`dbt3_s001`.`partsupp`.`ps_supplycost`) from `dbt3_s001`.`partsupp` join `dbt3_s001`.`supplier` join `dbt3_s001`.`nation` join `dbt3_s001`.`region` where ((`dbt3_s001`.`supplier`.`s_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey`) and (`dbt3_s001`.`nation`.`n_regionkey` = `dbt3_s001`.`region`.`r_regionkey`) and (`dbt3_s001`.`region`.`r_name` = 'ASIA') and (`dbt3_s001`.`part`.`p_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`)))))) order by `dbt3_s001`.`supplier`.`s_acctbal` desc,`dbt3_s001`.`nation`.`n_name`,`dbt3_s001`.`supplier`.`s_name`,`dbt3_s001`.`part`.`p_partkey`
=== Q15 ===
create view revenue0 (supplier_no, total_revenue) as
select l_suppkey, sum(l_extendedprice * (1 - l_discount))
from lineitem
where
l_shipdate >= '1995-08-01'
    and l_shipdate < date_add('1995-08-01', interval 90 day)
group by l_suppkey;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='index_condition_pushdown=off';
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED select s_suppkey, s_name, s_address, s_phone, total_revenue
from supplier, revenue0
where s_suppkey = supplier_no
and total_revenue = (select max(total_revenue) from revenue0)
order by s_suppkey;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	supplier	ALL	PRIMARY	NULL	NULL	NULL	10	100.00	Using filesort
1	PRIMARY	<derived3>	ref	key0	key0	5	dbt3_s001.supplier.s_suppkey	10	100.00	Using where
3	DERIVED	lineitem	range	i_l_shipdate	i_l_shipdate	4	NULL	268	100.00	Using where; Using temporary; Using filesort
2	SUBQUERY	<derived4>	ALL	NULL	NULL	NULL	NULL	268	100.00	
4	DERIVED	lineitem	range	i_l_shipdate	i_l_shipdate	4	NULL	268	100.00	Using where; Using temporary; Using filesort
Warnings:
Note	1003	select `dbt3_s001`.`supplier`.`s_suppkey` AS `s_suppkey`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`revenue0`.`total_revenue` AS `total_revenue` from `dbt3_s001`.`supplier` join `dbt3_s001`.`revenue0` where ((`revenue0`.`supplier_no` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`revenue0`.`total_revenue` = (select max(`revenue0`.`total_revenue`) from `dbt3_s001`.`revenue0`))) order by `dbt3_s001`.`supplier`.`s_suppkey`
select s_suppkey, s_name, s_address, s_phone, total_revenue
from supplier, revenue0
where s_suppkey = supplier_no
and total_revenue = (select max(total_revenue) from revenue0)
order by s_suppkey;
s_suppkey	s_name	s_address	s_phone	total_revenue
1	Supplier#000000001	 N kD4on9OM Ipw3,gf0JBoQDd7tgrzrddZ	27-918-335-1736	729084.7773
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED select s_suppkey, s_name, s_address, s_phone, total_revenue
from supplier, revenue0
where s_suppkey = supplier_no
and total_revenue = (select max(total_revenue) from revenue0)
order by s_suppkey;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	supplier	ALL	PRIMARY	NULL	NULL	NULL	10	100.00	Using filesort
1	PRIMARY	<derived3>	ref	key0	key0	5	dbt3_s001.supplier.s_suppkey	10	100.00	Using where
3	DERIVED	lineitem	range	i_l_shipdate	i_l_shipdate	4	NULL	268	100.00	Using where; Using temporary; Using filesort
2	SUBQUERY	<derived4>	ALL	NULL	NULL	NULL	NULL	268	100.00	
4	DERIVED	lineitem	range	i_l_shipdate	i_l_shipdate	4	NULL	268	100.00	Using where; Using temporary; Using filesort
Warnings:
Note	1003	select `dbt3_s001`.`supplier`.`s_suppkey` AS `s_suppkey`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`revenue0`.`total_revenue` AS `total_revenue` from `dbt3_s001`.`supplier` join `dbt3_s001`.`revenue0` where ((`revenue0`.`supplier_no` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`revenue0`.`total_revenue` = (select max(`revenue0`.`total_revenue`) from `dbt3_s001`.`revenue0`))) order by `dbt3_s001`.`supplier`.`s_suppkey`
select s_suppkey, s_name, s_address, s_phone, total_revenue
from supplier, revenue0
where s_suppkey = supplier_no
and total_revenue = (select max(total_revenue) from revenue0)
order by s_suppkey;
s_suppkey	s_name	s_address	s_phone	total_revenue
1	Supplier#000000001	 N kD4on9OM Ipw3,gf0JBoQDd7tgrzrddZ	27-918-335-1736	729084.7773
set optimizer_switch=@save_optimizer_switch;
drop view revenue0;
=== Q16 ===
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	100.00	Using where; Using temporary; Using filesort
1	PRIMARY	partsupp	ref	PRIMARY,i_ps_partkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	Using where; Using index
2	MATERIALIZED	supplier	ALL	PRIMARY	NULL	NULL	NULL	10	100.00	Using where
Warnings:
Note	1003	select `dbt3_s001`.`part`.`p_brand` AS `p_brand`,`dbt3_s001`.`part`.`p_type` AS `p_type`,`dbt3_s001`.`part`.`p_size` AS `p_size`,count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) AS `supplier_cnt` from `dbt3_s001`.`partsupp` join `dbt3_s001`.`part` where ((`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`part`.`p_brand` <> 'Brand#11') and (not((`dbt3_s001`.`part`.`p_type` like 'SMALL POLISHED%'))) and (`dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8)) and (not(<expr_cache><`dbt3_s001`.`partsupp`.`ps_suppkey`>(<in_optimizer>(`dbt3_s001`.`partsupp`.`ps_suppkey`,`dbt3_s001`.`partsupp`.`ps_suppkey` in ( <materialize> (select `dbt3_s001`.`supplier`.`s_suppkey` from `dbt3_s001`.`supplier` where (`dbt3_s001`.`supplier`.`s_comment` like '%Customer%Complaints%') ), <primary_index_lookup>(`dbt3_s001`.`partsupp`.`ps_suppkey` in <temporary table> on distinct_key where ((`dbt3_s001`.`partsupp`.`ps_suppkey` = `<subquery2>`.`s_suppkey`))))))))) group by `dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size` order by count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) desc,`dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size`
select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
p_brand	p_type	p_size	supplier_cnt
Brand#21	MEDIUM ANODIZED TIN	8	4
Brand#22	PROMO PLATED TIN	5	4
Brand#24	MEDIUM BURNISHED NICKEL	6	4
Brand#24	SMALL ANODIZED STEEL	40	4
Brand#32	MEDIUM BURNISHED BRASS	49	4
Brand#33	MEDIUM POLISHED BRASS	49	4
Brand#41	STANDARD BRUSHED NICKEL	40	4
Brand#44	PROMO POLISHED STEEL	5	4
Brand#45	PROMO ANODIZED BRASS	22	4
Brand#53	STANDARD BRUSHED STEEL	27	4
Brand#54	MEDIUM POLISHED BRASS	22	4
Brand#54	STANDARD ANODIZED BRASS	22	4
Brand#13	LARGE BRUSHED STEEL	8	2
Brand#25	ECONOMY BURNISHED COPPER	27	2
Brand#44	STANDARD PLATED TIN	37	1
Brand#51	ECONOMY POLISHED STEEL	49	1
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	16.67	Using where; Using temporary; Using filesort
1	PRIMARY	partsupp	ref	PRIMARY,i_ps_partkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	Using where; Using index
2	MATERIALIZED	supplier	ALL	PRIMARY	NULL	NULL	NULL	10	100.00	Using where
Warnings:
Note	1003	select `dbt3_s001`.`part`.`p_brand` AS `p_brand`,`dbt3_s001`.`part`.`p_type` AS `p_type`,`dbt3_s001`.`part`.`p_size` AS `p_size`,count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) AS `supplier_cnt` from `dbt3_s001`.`partsupp` join `dbt3_s001`.`part` where ((`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`part`.`p_brand` <> 'Brand#11') and (not((`dbt3_s001`.`part`.`p_type` like 'SMALL POLISHED%'))) and (`dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8)) and (not(<expr_cache><`dbt3_s001`.`partsupp`.`ps_suppkey`>(<in_optimizer>(`dbt3_s001`.`partsupp`.`ps_suppkey`,`dbt3_s001`.`partsupp`.`ps_suppkey` in ( <materialize> (select `dbt3_s001`.`supplier`.`s_suppkey` from `dbt3_s001`.`supplier` where (`dbt3_s001`.`supplier`.`s_comment` like '%Customer%Complaints%') ), <primary_index_lookup>(`dbt3_s001`.`partsupp`.`ps_suppkey` in <temporary table> on distinct_key where ((`dbt3_s001`.`partsupp`.`ps_suppkey` = `<subquery2>`.`s_suppkey`))))))))) group by `dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size` order by count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) desc,`dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size`
select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
p_brand	p_type	p_size	supplier_cnt
Brand#21	MEDIUM ANODIZED TIN	8	4
Brand#22	PROMO PLATED TIN	5	4
Brand#24	MEDIUM BURNISHED NICKEL	6	4
Brand#24	SMALL ANODIZED STEEL	40	4
Brand#32	MEDIUM BURNISHED BRASS	49	4
Brand#33	MEDIUM POLISHED BRASS	49	4
Brand#41	STANDARD BRUSHED NICKEL	40	4
Brand#44	PROMO POLISHED STEEL	5	4
Brand#45	PROMO ANODIZED BRASS	22	4
Brand#53	STANDARD BRUSHED STEEL	27	4
Brand#54	MEDIUM POLISHED BRASS	22	4
Brand#54	STANDARD ANODIZED BRASS	22	4
Brand#13	LARGE BRUSHED STEEL	8	2
Brand#25	ECONOMY BURNISHED COPPER	27	2
Brand#44	STANDARD PLATED TIN	37	1
Brand#51	ECONOMY POLISHED STEEL	49	1
set optimizer_use_condition_selectivity=4;
EXPLAIN EXTENDED select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	16.67	Using where; Using temporary; Using filesort
1	PRIMARY	partsupp	ref	PRIMARY,i_ps_partkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	Using where; Using index
2	MATERIALIZED	supplier	ALL	PRIMARY	NULL	NULL	NULL	10	100.00	Using where
Warnings:
Note	1003	select `dbt3_s001`.`part`.`p_brand` AS `p_brand`,`dbt3_s001`.`part`.`p_type` AS `p_type`,`dbt3_s001`.`part`.`p_size` AS `p_size`,count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) AS `supplier_cnt` from `dbt3_s001`.`partsupp` join `dbt3_s001`.`part` where ((`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`part`.`p_brand` <> 'Brand#11') and (not((`dbt3_s001`.`part`.`p_type` like 'SMALL POLISHED%'))) and (`dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8)) and (not(<expr_cache><`dbt3_s001`.`partsupp`.`ps_suppkey`>(<in_optimizer>(`dbt3_s001`.`partsupp`.`ps_suppkey`,`dbt3_s001`.`partsupp`.`ps_suppkey` in ( <materialize> (select `dbt3_s001`.`supplier`.`s_suppkey` from `dbt3_s001`.`supplier` where (`dbt3_s001`.`supplier`.`s_comment` like '%Customer%Complaints%') ), <primary_index_lookup>(`dbt3_s001`.`partsupp`.`ps_suppkey` in <temporary table> on distinct_key where ((`dbt3_s001`.`partsupp`.`ps_suppkey` = `<subquery2>`.`s_suppkey`))))))))) group by `dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size` order by count(distinct `dbt3_s001`.`partsupp`.`ps_suppkey`) desc,`dbt3_s001`.`part`.`p_brand`,`dbt3_s001`.`part`.`p_type`,`dbt3_s001`.`part`.`p_size`
select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
from partsupp, part
where p_partkey = ps_partkey
and p_brand <> 'Brand#11'
  and p_type not like 'SMALL POLISHED%'
  and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
and ps_suppkey not in (select s_suppkey from supplier
where s_comment like '%Customer%Complaints%')
group by p_brand, p_type, p_size
order by supplier_cnt desc, p_brand, p_type, p_size;
p_brand	p_type	p_size	supplier_cnt
Brand#21	MEDIUM ANODIZED TIN	8	4
Brand#22	PROMO PLATED TIN	5	4
Brand#24	MEDIUM BURNISHED NICKEL	6	4
Brand#24	SMALL ANODIZED STEEL	40	4
Brand#32	MEDIUM BURNISHED BRASS	49	4
Brand#33	MEDIUM POLISHED BRASS	49	4
Brand#41	STANDARD BRUSHED NICKEL	40	4
Brand#44	PROMO POLISHED STEEL	5	4
Brand#45	PROMO ANODIZED BRASS	22	4
Brand#53	STANDARD BRUSHED STEEL	27	4
Brand#54	MEDIUM POLISHED BRASS	22	4
Brand#54	STANDARD ANODIZED BRASS	22	4
Brand#13	LARGE BRUSHED STEEL	8	2
Brand#25	ECONOMY BURNISHED COPPER	27	2
Brand#44	STANDARD PLATED TIN	37	1
Brand#51	ECONOMY POLISHED STEEL	49	1
=== Q18 ===
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED select 
c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
from customer, orders, lineitem
where
o_orderkey in (select l_orderkey from lineitem
group by l_orderkey having sum(l_quantity) > 250)
and c_custkey = o_custkey
and o_orderkey = l_orderkey
group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
order by o_totalprice desc, o_orderdate;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	orders	ALL	PRIMARY,i_o_custkey	NULL	NULL	NULL	1500	100.00	Using where; Using temporary; Using filesort
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	dbt3_s001.orders.o_orderkey	1	100.00	
1	PRIMARY	customer	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.orders.o_custkey	1	100.00	
1	PRIMARY	lineitem	ref	PRIMARY,i_l_orderkey,i_l_orderkey_quantity	i_l_orderkey_quantity	4	dbt3_s001.orders.o_orderkey	4	100.00	Using index
2	MATERIALIZED	lineitem	index	NULL	i_l_orderkey_quantity	13	NULL	6005	100.00	Using index
Warnings:
Note	1003	select `dbt3_s001`.`customer`.`c_name` AS `c_name`,`dbt3_s001`.`customer`.`c_custkey` AS `c_custkey`,`dbt3_s001`.`orders`.`o_orderkey` AS `o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE` AS `o_orderdate`,`dbt3_s001`.`orders`.`o_totalprice` AS `o_totalprice`,sum(`dbt3_s001`.`lineitem`.`l_quantity`) AS `sum(l_quantity)` from  <materialize> (select `dbt3_s001`.`lineitem`.`l_orderkey` from `dbt3_s001`.`lineitem` group by `dbt3_s001`.`lineitem`.`l_orderkey` having (sum(`dbt3_s001`.`lineitem`.`l_quantity`) > 250)) join `dbt3_s001`.`customer` join `dbt3_s001`.`orders` join `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`customer`.`c_custkey` = `dbt3_s001`.`orders`.`o_custkey`) and (`<subquery2>`.`l_orderkey` = `dbt3_s001`.`orders`.`o_orderkey`) and (`dbt3_s001`.`lineitem`.`l_orderkey` = `dbt3_s001`.`orders`.`o_orderkey`)) group by `dbt3_s001`.`customer`.`c_name`,`dbt3_s001`.`customer`.`c_custkey`,`dbt3_s001`.`orders`.`o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE`,`dbt3_s001`.`orders`.`o_totalprice` order by `dbt3_s001`.`orders`.`o_totalprice` desc,`dbt3_s001`.`orders`.`o_orderDATE`
select 
c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
from customer, orders, lineitem
where
o_orderkey in (select l_orderkey from lineitem
group by l_orderkey having sum(l_quantity) > 250)
and c_custkey = o_custkey
and o_orderkey = l_orderkey
group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
order by o_totalprice desc, o_orderdate;
c_name	c_custkey	o_orderkey	o_orderdate	o_totalprice	sum(l_quantity)
Customer#000000070	70	2567	1998-02-27	263411.29	266
Customer#000000010	10	4421	1997-04-04	258779.02	255
Customer#000000082	82	3460	1995-10-03	245976.74	254
Customer#000000068	68	2208	1995-05-01	245388.06	256
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED select 
c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
from customer, orders, lineitem
where
o_orderkey in (select l_orderkey from lineitem
group by l_orderkey having sum(l_quantity) > 250)
and c_custkey = o_custkey
and o_orderkey = l_orderkey
group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
order by o_totalprice desc, o_orderdate;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	6005	0.00	Using temporary; Using filesort
1	PRIMARY	orders	eq_ref	PRIMARY,i_o_custkey	PRIMARY	4	<subquery2>.l_orderkey	1	100.00	Using where
1	PRIMARY	customer	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.orders.o_custkey	1	100.00	
1	PRIMARY	lineitem	ref	PRIMARY,i_l_orderkey,i_l_orderkey_quantity	PRIMARY	4	<subquery2>.l_orderkey	4	100.00	
2	MATERIALIZED	lineitem	index	NULL	i_l_orderkey_quantity	13	NULL	6005	100.00	Using index
Warnings:
Note	1003	select `dbt3_s001`.`customer`.`c_name` AS `c_name`,`dbt3_s001`.`customer`.`c_custkey` AS `c_custkey`,`dbt3_s001`.`orders`.`o_orderkey` AS `o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE` AS `o_orderdate`,`dbt3_s001`.`orders`.`o_totalprice` AS `o_totalprice`,sum(`dbt3_s001`.`lineitem`.`l_quantity`) AS `sum(l_quantity)` from  <materialize> (select `dbt3_s001`.`lineitem`.`l_orderkey` from `dbt3_s001`.`lineitem` group by `dbt3_s001`.`lineitem`.`l_orderkey` having (sum(`dbt3_s001`.`lineitem`.`l_quantity`) > 250)) join `dbt3_s001`.`customer` join `dbt3_s001`.`orders` join `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`customer`.`c_custkey` = `dbt3_s001`.`orders`.`o_custkey`) and (`dbt3_s001`.`orders`.`o_orderkey` = `<subquery2>`.`l_orderkey`) and (`dbt3_s001`.`lineitem`.`l_orderkey` = `<subquery2>`.`l_orderkey`)) group by `dbt3_s001`.`customer`.`c_name`,`dbt3_s001`.`customer`.`c_custkey`,`dbt3_s001`.`orders`.`o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE`,`dbt3_s001`.`orders`.`o_totalprice` order by `dbt3_s001`.`orders`.`o_totalprice` desc,`dbt3_s001`.`orders`.`o_orderDATE`
select 
c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
from customer, orders, lineitem
where
o_orderkey in (select l_orderkey from lineitem
group by l_orderkey having sum(l_quantity) > 250)
and c_custkey = o_custkey
and o_orderkey = l_orderkey
group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
order by o_totalprice desc, o_orderdate;
c_name	c_custkey	o_orderkey	o_orderdate	o_totalprice	sum(l_quantity)
Customer#000000070	70	2567	1998-02-27	263411.29	266
Customer#000000010	10	4421	1997-04-04	258779.02	255
Customer#000000082	82	3460	1995-10-03	245976.74	254
Customer#000000068	68	2208	1995-05-01	245388.06	256
=== Q22 ===
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal
from  (
select substr(c_phone, 1, 2) as cntrycode, c_acctbal
from customer
where
substr(c_phone, 1, 2) in ('10', '20', '14', '19', '11', '28', '25')
and c_acctbal > (select avg(c_acctbal) from customer
where c_acctbal > 0.00
and substr(c_phone, 1, 2) in
('10', '20', '14', '19', '11', '28', '25'))
and not exists (select * from orders where o_custkey = c_custkey)
) as vip
group by cntrycode
order by cntrycode;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	customer	ALL	NULL	NULL	NULL	NULL	150	100.00	Using where; Using temporary; Using filesort
4	DEPENDENT SUBQUERY	orders	ref	i_o_custkey	i_o_custkey	5	dbt3_s001.customer.c_custkey	15	100.00	Using index
3	SUBQUERY	customer	ALL	NULL	NULL	NULL	NULL	150	100.00	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.customer.c_custkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select substr(`dbt3_s001`.`customer`.`c_phone`,1,2) AS `cntrycode`,count(0) AS `numcust`,sum(`dbt3_s001`.`customer`.`c_acctbal`) AS `totacctbal` from `dbt3_s001`.`customer` where ((substr(`dbt3_s001`.`customer`.`c_phone`,1,2) in ('10','20','14','19','11','28','25')) and (`dbt3_s001`.`customer`.`c_acctbal` > (select avg(`dbt3_s001`.`customer`.`c_acctbal`) from `dbt3_s001`.`customer` where ((`dbt3_s001`.`customer`.`c_acctbal` > 0.00) and (substr(`dbt3_s001`.`customer`.`c_phone`,1,2) in ('10','20','14','19','11','28','25'))))) and (not(<in_optimizer>(1,exists(select 1 from `dbt3_s001`.`orders` where (`dbt3_s001`.`orders`.`o_custkey` = `dbt3_s001`.`customer`.`c_custkey`)))))) group by substr(`dbt3_s001`.`customer`.`c_phone`,1,2) order by substr(`dbt3_s001`.`customer`.`c_phone`,1,2)
select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal
from  (
select substr(c_phone, 1, 2) as cntrycode, c_acctbal
from customer
where
substr(c_phone, 1, 2) in ('10', '20', '14', '19', '11', '28', '25')
and c_acctbal > (select avg(c_acctbal) from customer
where c_acctbal > 0.00
and substr(c_phone, 1, 2) in
('10', '20', '14', '19', '11', '28', '25'))
and not exists (select * from orders where o_custkey = c_custkey)
) as vip
group by cntrycode
order by cntrycode;
cntrycode	numcust	totacctbal
11	4	29942.58
19	2	17120.35
20	1	9091.82
28	2	14755.5
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal
from  (
select substr(c_phone, 1, 2) as cntrycode, c_acctbal
from customer
where
substr(c_phone, 1, 2) in ('10', '20', '14', '19', '11', '28', '25')
and c_acctbal > (select avg(c_acctbal) from customer
where c_acctbal > 0.00
and substr(c_phone, 1, 2) in
('10', '20', '14', '19', '11', '28', '25'))
and not exists (select * from orders where o_custkey = c_custkey)
) as vip
group by cntrycode
order by cntrycode;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	customer	ALL	NULL	NULL	NULL	NULL	150	100.00	Using where; Using temporary; Using filesort
4	DEPENDENT SUBQUERY	orders	ref	i_o_custkey	i_o_custkey	5	dbt3_s001.customer.c_custkey	15	100.00	Using index
3	SUBQUERY	customer	ALL	NULL	NULL	NULL	NULL	150	91.00	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.customer.c_custkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select substr(`dbt3_s001`.`customer`.`c_phone`,1,2) AS `cntrycode`,count(0) AS `numcust`,sum(`dbt3_s001`.`customer`.`c_acctbal`) AS `totacctbal` from `dbt3_s001`.`customer` where ((substr(`dbt3_s001`.`customer`.`c_phone`,1,2) in ('10','20','14','19','11','28','25')) and (`dbt3_s001`.`customer`.`c_acctbal` > (select avg(`dbt3_s001`.`customer`.`c_acctbal`) from `dbt3_s001`.`customer` where ((`dbt3_s001`.`customer`.`c_acctbal` > 0.00) and (substr(`dbt3_s001`.`customer`.`c_phone`,1,2) in ('10','20','14','19','11','28','25'))))) and (not(<in_optimizer>(1,exists(select 1 from `dbt3_s001`.`orders` where (`dbt3_s001`.`orders`.`o_custkey` = `dbt3_s001`.`customer`.`c_custkey`)))))) group by substr(`dbt3_s001`.`customer`.`c_phone`,1,2) order by substr(`dbt3_s001`.`customer`.`c_phone`,1,2)
select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal
from  (
select substr(c_phone, 1, 2) as cntrycode, c_acctbal
from customer
where
substr(c_phone, 1, 2) in ('10', '20', '14', '19', '11', '28', '25')
and c_acctbal > (select avg(c_acctbal) from customer
where c_acctbal > 0.00
and substr(c_phone, 1, 2) in
('10', '20', '14', '19', '11', '28', '25'))
and not exists (select * from orders where o_custkey = c_custkey)
) as vip
group by cntrycode
order by cntrycode;
cntrycode	numcust	totacctbal
11	4	29942.58
19	2	17120.35
20	1	9091.82
28	2	14755.5
=== Q20 ===
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	supplier	ALL	PRIMARY,i_s_nationkey	NULL	NULL	NULL	10	100.00	Using where; Using filesort
1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	4	func	1	100.00	
1	PRIMARY	nation	eq_ref	PRIMARY	PRIMARY	4	dbt3_s001.supplier.s_nationkey	1	100.00	Using where
2	MATERIALIZED	part	ALL	PRIMARY	NULL	NULL	NULL	200	100.00	Using where
2	MATERIALIZED	partsupp	ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	4	dbt3_s001.part.p_partkey	3	100.00	Using where
4	DEPENDENT SUBQUERY	lineitem	ref	i_l_shipdate,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.partsupp.ps_suppkey	8	100.00	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_partkey' of SELECT #4 was resolved in SELECT #2
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_suppkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select sql_calc_found_rows `dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address` from `dbt3_s001`.`supplier` semi join (`dbt3_s001`.`part` join `dbt3_s001`.`partsupp`) join `dbt3_s001`.`nation` where ((`dbt3_s001`.`nation`.`n_nationkey` = `dbt3_s001`.`supplier`.`s_nationkey`) and (`dbt3_s001`.`nation`.`n_name` = 'UNITED STATES') and (`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_availqty` > <expr_cache><`dbt3_s001`.`partsupp`.`ps_partkey`,`dbt3_s001`.`partsupp`.`ps_suppkey`>((select (0.5 * sum(`dbt3_s001`.`lineitem`.`l_quantity`)) from `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`lineitem`.`l_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`) and (`dbt3_s001`.`lineitem`.`l_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`lineitem`.`l_shipDATE` >= <cache>(cast('1993-01-01' as date))) and (`dbt3_s001`.`lineitem`.`l_shipDATE` < <cache>((cast('1993-01-01' as date) + interval '1' year))))))) and (`dbt3_s001`.`part`.`p_name` like 'g%')) order by `dbt3_s001`.`supplier`.`s_name` limit 10
select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
s_name	s_address
Supplier#000000010	Saygah3gYWMp72i PY
SELECT ((SELECT COUNT(*) FROM part WHERE p_name LIKE 'g%') /
(SELECT COUNT(*) FROM part)) AS sel;
sel
0.0600
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	nation	ALL	PRIMARY	NULL	NULL	NULL	25	4.00	Using where; Using temporary; Using filesort
1	PRIMARY	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.nation.n_nationkey	1	100.00	
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	4.17	Using where; Start temporary; Using join buffer (flat, BNL join)
1	PRIMARY	partsupp	eq_ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	8	dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey	1	100.00	Using where; End temporary
4	DEPENDENT SUBQUERY	lineitem	ref	i_l_shipdate,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.partsupp.ps_suppkey	8	15.14	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_partkey' of SELECT #4 was resolved in SELECT #2
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_suppkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select sql_calc_found_rows `dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address` from `dbt3_s001`.`supplier` semi join (`dbt3_s001`.`part` join `dbt3_s001`.`partsupp`) join `dbt3_s001`.`nation` where ((`dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey`) and (`dbt3_s001`.`nation`.`n_name` = 'UNITED STATES') and (`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`dbt3_s001`.`partsupp`.`ps_availqty` > <expr_cache><`dbt3_s001`.`partsupp`.`ps_partkey`,`dbt3_s001`.`partsupp`.`ps_suppkey`>((select (0.5 * sum(`dbt3_s001`.`lineitem`.`l_quantity`)) from `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`lineitem`.`l_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`) and (`dbt3_s001`.`lineitem`.`l_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`lineitem`.`l_shipDATE` >= <cache>(cast('1993-01-01' as date))) and (`dbt3_s001`.`lineitem`.`l_shipDATE` < <cache>((cast('1993-01-01' as date) + interval '1' year))))))) and (`dbt3_s001`.`part`.`p_name` like 'g%')) order by `dbt3_s001`.`supplier`.`s_name` limit 10
select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
s_name	s_address
Supplier#000000010	Saygah3gYWMp72i PY
set histogram_size=127;
ANALYZE TABLE part PERSISTENT FOR COLUMNS(p_name) INDEXES();
Table	Op	Msg_type	Msg_text
dbt3_s001.part	analyze	status	Engine-independent statistics collected
dbt3_s001.part	analyze	status	Table is already up to date
flush table part;
set optimizer_use_condition_selectivity=4;
EXPLAIN EXTENDED select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	nation	ALL	PRIMARY	NULL	NULL	NULL	25	4.00	Using where; Using temporary; Using filesort
1	PRIMARY	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.nation.n_nationkey	1	100.00	
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	7.03	Using where
1	PRIMARY	partsupp	eq_ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	8	dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey	1	100.00	Using where; FirstMatch(supplier)
4	DEPENDENT SUBQUERY	lineitem	ref	i_l_shipdate,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.partsupp.ps_suppkey	8	15.14	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_partkey' of SELECT #4 was resolved in SELECT #2
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_suppkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select sql_calc_found_rows `dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address` from `dbt3_s001`.`supplier` semi join (`dbt3_s001`.`part` join `dbt3_s001`.`partsupp`) join `dbt3_s001`.`nation` where ((`dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey`) and (`dbt3_s001`.`nation`.`n_name` = 'UNITED STATES') and (`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`dbt3_s001`.`partsupp`.`ps_availqty` > <expr_cache><`dbt3_s001`.`partsupp`.`ps_partkey`,`dbt3_s001`.`partsupp`.`ps_suppkey`>((select (0.5 * sum(`dbt3_s001`.`lineitem`.`l_quantity`)) from `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`lineitem`.`l_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`) and (`dbt3_s001`.`lineitem`.`l_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`lineitem`.`l_shipDATE` >= <cache>(cast('1993-01-01' as date))) and (`dbt3_s001`.`lineitem`.`l_shipDATE` < <cache>((cast('1993-01-01' as date) + interval '1' year))))))) and (`dbt3_s001`.`part`.`p_name` like 'g%')) order by `dbt3_s001`.`supplier`.`s_name` limit 10
select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
s_name	s_address
Supplier#000000010	Saygah3gYWMp72i PY
set histogram_type='DOUBLE_PREC_HB';
set histogram_size=126;
ANALYZE TABLE part PERSISTENT FOR COLUMNS(p_name) INDEXES();
Table	Op	Msg_type	Msg_text
dbt3_s001.part	analyze	status	Engine-independent statistics collected
dbt3_s001.part	analyze	status	Table is already up to date
flush table part;
EXPLAIN EXTENDED select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	nation	ALL	PRIMARY	NULL	NULL	NULL	25	4.00	Using where; Using temporary; Using filesort
1	PRIMARY	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.nation.n_nationkey	1	100.00	
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	7.81	Using where
1	PRIMARY	partsupp	eq_ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	8	dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey	1	100.00	Using where; FirstMatch(supplier)
4	DEPENDENT SUBQUERY	lineitem	ref	i_l_shipdate,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.partsupp.ps_suppkey	8	15.14	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_partkey' of SELECT #4 was resolved in SELECT #2
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_suppkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select sql_calc_found_rows `dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address` from `dbt3_s001`.`supplier` semi join (`dbt3_s001`.`part` join `dbt3_s001`.`partsupp`) join `dbt3_s001`.`nation` where ((`dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey`) and (`dbt3_s001`.`nation`.`n_name` = 'UNITED STATES') and (`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`dbt3_s001`.`partsupp`.`ps_availqty` > <expr_cache><`dbt3_s001`.`partsupp`.`ps_partkey`,`dbt3_s001`.`partsupp`.`ps_suppkey`>((select (0.5 * sum(`dbt3_s001`.`lineitem`.`l_quantity`)) from `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`lineitem`.`l_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`) and (`dbt3_s001`.`lineitem`.`l_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`lineitem`.`l_shipDATE` >= <cache>(cast('1993-01-01' as date))) and (`dbt3_s001`.`lineitem`.`l_shipDATE` < <cache>((cast('1993-01-01' as date) + interval '1' year))))))) and (`dbt3_s001`.`part`.`p_name` like 'g%')) order by `dbt3_s001`.`supplier`.`s_name` limit 10
select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
s_name	s_address
Supplier#000000010	Saygah3gYWMp72i PY
set histogram_type='SINGLE_PREC_HB';
set histogram_size=24;
ANALYZE TABLE nation PERSISTENT FOR COLUMNS(n_name) INDEXES();
Table	Op	Msg_type	Msg_text
dbt3_s001.nation	analyze	status	Engine-independent statistics collected
dbt3_s001.nation	analyze	status	Table is already up to date
flush table nation;
EXPLAIN EXTENDED select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	nation	ALL	PRIMARY	NULL	NULL	NULL	25	4.00	Using where; Using temporary; Using filesort
1	PRIMARY	supplier	ref	PRIMARY,i_s_nationkey	i_s_nationkey	5	dbt3_s001.nation.n_nationkey	1	100.00	
1	PRIMARY	part	ALL	PRIMARY	NULL	NULL	NULL	200	7.81	Using where
1	PRIMARY	partsupp	eq_ref	PRIMARY,i_ps_partkey,i_ps_suppkey	PRIMARY	8	dbt3_s001.part.p_partkey,dbt3_s001.supplier.s_suppkey	1	100.00	Using where; FirstMatch(supplier)
4	DEPENDENT SUBQUERY	lineitem	ref	i_l_shipdate,i_l_suppkey_partkey,i_l_partkey,i_l_suppkey	i_l_suppkey_partkey	10	dbt3_s001.partsupp.ps_partkey,dbt3_s001.partsupp.ps_suppkey	8	15.14	Using where
Warnings:
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_partkey' of SELECT #4 was resolved in SELECT #2
Note	1276	Field or reference 'dbt3_s001.partsupp.ps_suppkey' of SELECT #4 was resolved in SELECT #2
Note	1003	select sql_calc_found_rows `dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address` from `dbt3_s001`.`supplier` semi join (`dbt3_s001`.`part` join `dbt3_s001`.`partsupp`) join `dbt3_s001`.`nation` where ((`dbt3_s001`.`supplier`.`s_nationkey` = `dbt3_s001`.`nation`.`n_nationkey`) and (`dbt3_s001`.`nation`.`n_name` = 'UNITED STATES') and (`dbt3_s001`.`partsupp`.`ps_partkey` = `dbt3_s001`.`part`.`p_partkey`) and (`dbt3_s001`.`partsupp`.`ps_suppkey` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`dbt3_s001`.`partsupp`.`ps_availqty` > <expr_cache><`dbt3_s001`.`partsupp`.`ps_partkey`,`dbt3_s001`.`partsupp`.`ps_suppkey`>((select (0.5 * sum(`dbt3_s001`.`lineitem`.`l_quantity`)) from `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`lineitem`.`l_partkey` = `dbt3_s001`.`partsupp`.`ps_partkey`) and (`dbt3_s001`.`lineitem`.`l_suppkey` = `dbt3_s001`.`partsupp`.`ps_suppkey`) and (`dbt3_s001`.`lineitem`.`l_shipDATE` >= <cache>(cast('1993-01-01' as date))) and (`dbt3_s001`.`lineitem`.`l_shipDATE` < <cache>((cast('1993-01-01' as date) + interval '1' year))))))) and (`dbt3_s001`.`part`.`p_name` like 'g%')) order by `dbt3_s001`.`supplier`.`s_name` limit 10
select sql_calc_found_rows
s_name, s_address
from supplier, nation
where s_suppkey in (select ps_suppkey from partsupp
where ps_partkey in (select p_partkey from part
where p_name like 'g%')
and ps_availqty >
(select 0.5 * sum(l_quantity)
from lineitem
where l_partkey = ps_partkey
and l_suppkey = ps_suppkey
and l_shipdate >= date('1993-01-01')
and l_shipdate < date('1993-01-01') +
interval '1' year ))
and s_nationkey = n_nationkey
and n_name = 'UNITED STATES'
order by s_name
limit 10;
s_name	s_address
Supplier#000000010	Saygah3gYWMp72i PY
DROP DATABASE dbt3_s001;
set histogram_type=@save_histogram_type;
set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
use test;
#
# Bug mdev-4348: using view with use_condition_selectivity > 1 
#
set @tmp_use_stat_tables=@@use_stat_tables;
set use_stat_tables='never';
set optimizer_use_condition_selectivity=3;
CREATE TABLE t1 (a int, b int);
INSERT t1 VALUES (7,1), (0,7);
CREATE ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1;
CREATE TABLE t2 (c int, d int, index idx(d));
INSERT INTO t2 VALUES 
(0,4), (8,6), (1,3), (8,5), (9,3), (2,2), (6,2),
(1,9), (6,3), (2,8), (4,1), (0,7), (4,8), (4,5);
EXPLAIN EXTENDED
SELECT * FROM v1 INNER JOIN t2 ON ( a = c AND b = d );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
1	SIMPLE	t2	ref	idx	idx	5	test.t1.b	2	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`c` = `test`.`t1`.`a`) and (`test`.`t2`.`d` = `test`.`t1`.`b`))
SELECT * FROM v1 INNER JOIN t2 ON ( a = c AND b = d );
a	b	c	d
0	7	0	7
DROP VIEW v1;
DROP TABLE t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@tmp_use_stat_tables;
#
# Bug mdev-4349: impossible range for non-indexed column 
#
set optimizer_use_condition_selectivity=3;
create table t1 (a int);
insert into t1 values
(3), (7), (2), (5), (7), (1), (2), (2);
set optimizer_use_condition_selectivity=1;
explain extended
select * from t1 where a < 1 and a > 7;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` < 1) and (`test`.`t1`.`a` > 7))
select * from t1 where a < 1 and a > 7;
a
set optimizer_use_condition_selectivity=3;
explain extended
select * from t1 where a < 1 and a > 7;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where 0
select * from t1 where a < 1 and a > 7;
a
drop table t1;
create table t1 (a int);
insert into t1 values (1);
create table t2 (b int);
insert into t2 values (2),(3);
explain extended 
select * from t1 where a in ( select b from t2 ) AND ( a > 3 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select 1 AS `a` from (`test`.`t2`) where 0
select * from t1 where a in ( select b from t2 ) AND ( a > 3 );
a
drop table t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-4350: erroneous negative selectivity 
#
create table t1 (a int);
insert into t1 values (1), (1);
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 select * from t1;
insert into t1 values (0);
select count(*) from t1;
count(*)
1025
set use_stat_tables='preferably';
set histogram_size=127;
set histogram_type='SINGLE_PREC_HB';
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
flush table t1;
set optimizer_use_condition_selectivity=4;
explain extended select * from t1 where a=0;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	1025	0.39	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 0)
drop table t1;
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-4367: 2-way join with an empty table 
#                when optimizer_use_condition_selectivity=3
#
set optimizer_use_condition_selectivity=3;
CREATE TABLE t1 (a varchar(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('j'),('k');
CREATE TABLE t2 (b varchar(1)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('x'),('y');
CREATE TABLE t3 (c varchar(1), KEY(c)) ENGINE=MyISAM;
SELECT * FROM t1 STRAIGHT_JOIN (t2 JOIN t3 ON c = b AND b > 'z');
a	b	c
DROP TABLE t1,t2,t3;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-4366: impossible condition on an indexed column discovered after
#                substitution of constant tables
#                with optimizer_use_condition_selectivity=3
#
CREATE TABLE t1 (pk int PRIMARY KEY, a int);
INSERT INTO t1 VALUES 
(1,4), (2,6), (3,3), (4,5);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (1), (7);
set optimizer_use_condition_selectivity=1;
EXPLAIN EXTENDED
SELECT 1 FROM t1, t2 WHERE pk = 6 AND a = 2 AND b = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select 1 AS `1` from `test`.`t1` join `test`.`t2` where 0
SELECT 1 FROM t1, t2 WHERE pk = 6 AND a = 2 AND b = 10;
1
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT 1 FROM t1, t2 WHERE pk = 6 AND a = 2 AND b = 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select 1 AS `1` from `test`.`t1` join `test`.`t2` where 0
SELECT 1 FROM t1, t2 WHERE pk = 6 AND a = 2 AND b = 10;
1
DROP TABLE t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-4370: Histograms have bean created, but the query is run after
#                FLUSH TABLES with optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
set histogram_size=10;
set histogram_type='SINGLE_PREC_HB';
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (9), (1);
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a > 3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	75.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` > 3)
SELECT * FROM t1 WHERE a > 3;
a
9
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1;
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4371: Join with condition supported by index on an empty table  
#                with optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a int, b int, INDEX(a));
CREATE TABLE t2 (c int);
INSERT INTO t2 VALUES (1),(2),(3),(4),(5),(6),(7),(8);
ANALYZE TABLE t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	Table is already up to date
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='index_condition_pushdown=off';
EXPLAIN EXTENDED
SELECT * FROM t1, t2 WHERE a > 9;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select NULL AS `a`,NULL AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where 0
SELECT * FROM t1, t2 WHERE a > 9;
a	b	c
set optimizer_switch=@save_optimizer_switch;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4373: condition on a short varchar column   
#                with optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a varchar(1));
INSERT INTO t1 VALUES ('x'), ('y');
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
SELECT * FROM t1 WHERE a <= 'w';
a
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4372: exists subquery in WHERE   
#                with optimizer_use_condition_selectivity=3
#
set use_stat_tables = PREFERABLY;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES 
(1),(7),(4),(7),(0),(2),(9),(4),(0),(9),(1),(3),(8),(8);
CREATE TABLE t2 (b int);
INSERT INTO t2 VALUES (4),(5),(2),(5),(1),(1),(2);
ANALYZE TABLE t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT * FROM t1, t2 WHERE EXISTS ( SELECT 1 FROM t1, t2 ) AND a != b OR a <= 4;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	14	100.00	Using where; Using join buffer (flat, BNL join)
2	SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	7	100.00	
2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	14	100.00	Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where ((<cache>(<in_optimizer>(1,exists(select 1 from `test`.`t1` join `test`.`t2`))) and (`test`.`t1`.`a` <> `test`.`t2`.`b`)) or (`test`.`t1`.`a` <= 4))
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4363: selectivity of the condition a IS NULL OR IS NOT NULL   
#                with optimizer_use_condition_selectivity=3
#
set use_stat_tables = PREFERABLY;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES 
(1),(7),(4),(7),(NULL),(2),(NULL),(4),(NULL),(NULL),(1),(3),(8),(8);
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
FLUSH TABLE t1;
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	14	28.57	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where isnull(`test`.`t1`.`a`)
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a IS NOT NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	14	71.43	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` is not null)
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a IS NULL OR a IS NOT NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	14	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (isnull(`test`.`t1`.`a`) or (`test`.`t1`.`a` is not null))
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE a IS NULL OR a < 5;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	14	69.39	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (isnull(`test`.`t1`.`a`) or (`test`.`t1`.`a` < 5))
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4378: 2-way join with a materialized IN subquery in WHERE   
#                when optimizer_use_condition_selectivity=4
#
set use_stat_tables=PREFERABLY;
set histogram_size=50;
set histogram_type=SINGLE_PREC_HB;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8),(9),(6);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8),(1),(8),(9),(24),(6),(1),(6),(2),(4);
CREATE TABLE t3 (ln VARCHAR(16)) ENGINE=MyISAM;
INSERT INTO t3 VALUES 
('smith'),('black'),('white'),('jones'),
('brown'),('taylor'),('anderson'),('taylor');
ANALYZE TABLE t1, t2, t3;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
test.t3	analyze	status	Engine-independent statistics collected
test.t3	analyze	status	OK
FLUSH TABLES;
set  optimizer_use_condition_selectivity=4;
SELECT * FROM t1, t2 WHERE 'garcia' IN ( SELECT MIN( ln ) FROM t3 WHERE ln = 'sun' );
a	b
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4380: 2-way join with a materialized IN subquery in WHERE   
#                when optimizer_use_condition_selectivity=3
#
set  use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (5),(9);
CREATE TABLE t2 (b VARCHAR(8));
INSERT INTO t2 VALUES ('red'),('blue');
CREATE TABLE t3 (c VARCHAR(8), d VARCHAR(8));
INSERT INTO t3 VALUES ('white','black'),('cyan','yellow');
ANALYZE TABLE t1, t2, t3;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
test.t3	analyze	status	Engine-independent statistics collected
test.t3	analyze	status	OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
SELECT * FROM t1, t2 WHERE ( 'orange', 'green' ) IN ( 
SELECT MAX(c), MAX(d) FROM t3, t2 WHERE c >= d AND b = c 
);
a	b
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4389: join with degenerated range condition in WHERE   
#                when optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (f1 VARCHAR(1));
INSERT t1 VALUES ('p'),('q');
CREATE TABLE t2 (f2 VARCHAR(1));
INSERT INTO t2 VALUES 
('o'),('v'),('f'),('f'),('e'),('l'),('j'),('p'),('r'),('j'),
('j'),('u'),('i'),('r'),('x'),('a'),('x'),('s');
ANALYZE TABLE t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
FLUSH TABLES;
SET optimizer_use_condition_selectivity=3;
SELECT * FROM t1, t2 AS t2a, t2 AS t2b WHERE f1 <= 'a' AND t2a.f2 = f1;
f1	f2	f2
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4406: range condition for non-nullable column   
#                when optimizer_use_condition_selectivity=3
#
create table t1 (a int not null);
insert into t1 values
(7), (6), (4), (9), (1), (5), (2), (1), (3), (8);
set use_stat_tables='preferably';
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
flush table t1;
set optimizer_use_condition_selectivity=3;
select count(*) from t1 where a between 5 and 7;
count(*)
3
explain extended select * from t1 where a between 5 and 7;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	25.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` between 5 and 7)
alter table t1 change column a a int;
analyze table t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
flush table t1;
explain extended select * from t1 where a between 5 and 7;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	10	25.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` between 5 and 7)
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
drop table t1;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-5200: impossible where with a semijoin subquery   
#                when optimizer_use_condition_selectivity=2
#
set use_stat_tables = 'preferably';
set optimizer_use_condition_selectivity = 2;
CREATE TABLE t1 (i1 int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (0), (1);
CREATE TABLE t2 (pk2 int, i2 int, c2 char(1), PRIMARY KEY(pk2)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1,8,'m'), (2,9,'b');
CREATE TABLE t3 (c3 char(1), INDEX(c3)) ENGINE=MyISAM;
INSERT INTO t3 VALUES ('v'), ('c');
ANALYZE TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
test.t3	analyze	status	Engine-independent statistics collected
test.t3	analyze	status	OK
SELECT * FROM t1
WHERE 2 IN ( SELECT pk2 FROM t2 LEFT JOIN t3 ON (c3 = c2 ) WHERE i2 = 3 );
i1
EXPLAIN EXTENDED
SELECT * FROM t1
WHERE 2 IN ( SELECT pk2 FROM t2 LEFT JOIN t3 ON (c3 = c2 ) WHERE i2 = 3 );
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select `test`.`t1`.`i1` AS `i1` from `test`.`t1` semi join (`test`.`t2` left join `test`.`t3` on((`test`.`t3`.`c3` = 'b'))) where 0
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
#
# Bug mdev-5415: query over an information schema table   
#                when optimizer_use_condition_selectivity=3
#
set optimizer_use_condition_selectivity = 3;
SELECT * FROM INFORMATION_SCHEMA.TRIGGERS WHERE SQL_MODE != '';
TRIGGER_CATALOG	TRIGGER_SCHEMA	TRIGGER_NAME	EVENT_MANIPULATION	EVENT_OBJECT_CATALOG	EVENT_OBJECT_SCHEMA	EVENT_OBJECT_TABLE	ACTION_ORDER	ACTION_CONDITION	ACTION_STATEMENT	ACTION_ORIENTATION	ACTION_TIMING	ACTION_REFERENCE_OLD_TABLE	ACTION_REFERENCE_NEW_TABLE	ACTION_REFERENCE_OLD_ROW	ACTION_REFERENCE_NEW_ROW	CREATED	SQL_MODE	DEFINER	CHARACTER_SET_CLIENT	COLLATION_CONNECTION	DATABASE_COLLATION
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-5630: always true conjunctive condition   
#                when optimizer_use_condition_selectivity=3
#
set use_stat_tables = 'preferably';
set optimizer_use_condition_selectivity = 3;
CREATE TABLE t1 (a int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (10);
CREATE TABLE t2 (id int, flag char(1), INDEX(id)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (100,'0'),(101,'1');
ANALYZE TABLE t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
SELECT * FROM t1, t2 WHERE id = a AND ( a = 16 OR flag AND a != 6 );
a	id	flag
DROP TABLE t1,t2;
#
# Bug mdev-4429: join with  range condition whose selectivity == 0   
#                when optimizer_use_condition_selectivity=3
#
CREATE TABLE language (lang_group INT, lang VARCHAR(16) PRIMARY KEY);
INSERT INTO language VALUES 
(1,'Chinese'),(6,'English'),(1,'French'),
(1,'German'),(1,'Italian'),(0,'Japanese');
CREATE TABLE country (code varchar(3) PRIMARY KEY,
country_group INT DEFAULT NULL);
INSERT INTO country VALUES ('USA',3),('FRA',5);
CREATE TABLE continent (cont_group INT, cont varchar(16) PRIMARY KEY);
INSERT INTO continent VALUES
(1,'N.America'),(1,'S.America'),(3,'Australia'),
(4,'Africa'),(5,'Antarctica'),(6,'Eurasia');
SET use_stat_tables=PREFERABLY;
ANALYZE TABLE country, language, continent;
Table	Op	Msg_type	Msg_text
test.country	analyze	status	Engine-independent statistics collected
test.country	analyze	status	OK
test.language	analyze	status	Engine-independent statistics collected
test.language	analyze	status	OK
test.continent	analyze	status	Engine-independent statistics collected
test.continent	analyze	status	OK
FLUSH TABLES;
SET optimizer_use_condition_selectivity=3;
SELECT * FROM language, country, continent
WHERE country_group = lang_group AND lang_group IS NULL;
lang_group	lang	code	country_group	cont_group	cont
EXPLAIN EXTENDED
SELECT * FROM language, country, continent
WHERE country_group = lang_group AND lang_group IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	country	ALL	NULL	NULL	NULL	NULL	2	0.00	Using where
1	SIMPLE	language	ALL	NULL	NULL	NULL	NULL	6	0.00	Using where; Using join buffer (flat, BNL join)
1	SIMPLE	continent	ALL	NULL	NULL	NULL	NULL	6	100.00	Using join buffer (incremental, BNL join)
Warnings:
Note	1003	select `test`.`language`.`lang_group` AS `lang_group`,`test`.`language`.`lang` AS `lang`,`test`.`country`.`code` AS `code`,`test`.`country`.`country_group` AS `country_group`,`test`.`continent`.`cont_group` AS `cont_group`,`test`.`continent`.`cont` AS `cont` from `test`.`language` join `test`.`country` join `test`.`continent` where ((`test`.`language`.`lang_group` = `test`.`country`.`country_group`) and isnull(`test`.`country`.`country_group`))
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
drop table language, country, continent;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-5191: performance degradation due to a suboptimal chosen plan   
#                when optimizer_use_condition_selectivity=3
#
set use_stat_tables = 'preferably';
set @@RAND_SEED1=810763568, @@RAND_SEED2=600681772;
set TIMESTAMP=1394806993;
create table t1 (a int, b int) engine=myisam;
insert t1 values (rand()*1e5, rand()*1e5);
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
insert t1 select rand()*1e5, rand()*1e5 from t1;
create table t2 (c int, d int, key(c), key(d)) engine=myisam;
insert t2 select floor(rand()*1e5/2)*2, floor(rand()*1e5/3)*3 from t1;
analyze table t1,t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	Table is already up to date
set optimizer_use_condition_selectivity=1;
explain extended 
select * from t1, t2, t1 as t3
where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	262144	100.00	Using where
1	SIMPLE	t2	ref	c,d	c	5	test.t1.b	5	100.00	
1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	262144	100.00	Using where; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` `t3` where ((`test`.`t2`.`c` = `test`.`t1`.`b`) and (`test`.`t3`.`a` = `test`.`t2`.`d`) and (`test`.`t3`.`b` < 5) and (`test`.`t1`.`a` < 2000))
select * from t1, t2, t1 as t3
where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
a	b	c	d	a	b
1495	89366	89366	28296	28296	3
961	24512	24512	85239	85239	4
1063	89366	89366	28296	28296	3
221	56120	56120	28296	28296	3
set optimizer_use_condition_selectivity=3;
explain extended
select * from t1, t2, t1 as t3
where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	262144	0.00	Using where
1	SIMPLE	t2	ref	c,d	d	5	test.t3.a	7	100.00	
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	262144	2.00	Using where; Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t1` `t3` where ((`test`.`t1`.`b` = `test`.`t2`.`c`) and (`test`.`t2`.`d` = `test`.`t3`.`a`) and (`test`.`t3`.`b` < 5) and (`test`.`t1`.`a` < 2000))
select * from t1, t2, t1 as t3
where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
a	b	c	d	a	b
961	24512	24512	85239	85239	4
1495	89366	89366	28296	28296	3
1063	89366	89366	28296	28296	3
221	56120	56120	28296	28296	3
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
drop table t1,t2;
set histogram_type=@save_histogram_type;
set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
#
# Bug mdev-5931: no where condition after constant table row substitution 
#                with optimizer_use_condition_selectivity=3
#
CREATE TABLE t1 (a varchar(3), b varchar(3)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('foo', 'foo');
CREATE TABLE t2 (c INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1), (2);
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT * FROM t1, t2 WHERE c >= 0 OR a = b ;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	system	NULL	NULL	NULL	NULL	1	100.00	
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	2	100.00	
Warnings:
Note	1003	select 'foo' AS `a`,'foo' AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where 1
SELECT * FROM t1, t2 WHERE c >= 0 OR a = b ;
a	b	c
foo	foo	1
foo	foo	2
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
#
# Bug mdev-6325: wrong selectivity of a column with ref access 
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int);
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
create table t2 (a int, b int, key(a));
insert into t2 select A.a + 10*B.a, 12345 from t0 A, t0 B, t0 C;
set use_stat_tables='preferably';
set histogram_size=100;
set optimizer_use_condition_selectivity=4;
analyze table t1 persistent for all;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
analyze table t2 persistent for all;
Table	Op	Msg_type	Msg_text
test.t2	analyze	status	Engine-independent statistics collected
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	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	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))
set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
drop table t0,t1,t2;
#
# Bug mdev-6843: col IS NULL in where condition when col is always NULL
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int);
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
create table t2 (a int, b int);
insert into t2 select NULL, a from t1;
set use_stat_tables='preferably';
set histogram_size=100;
set optimizer_use_condition_selectivity=4;
analyze table t2 persistent for all;
Table	Op	Msg_type	Msg_text
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
explain extended
select * from t2 a straight_join t2 b where a.a is null;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	a	ALL	NULL	NULL	NULL	NULL	1000	100.00	Using where
1	SIMPLE	b	ALL	NULL	NULL	NULL	NULL	1000	100.00	Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`a`.`a` AS `a`,`test`.`a`.`b` AS `b`,`test`.`b`.`a` AS `a`,`test`.`b`.`b` AS `b` from `test`.`t2` `a` straight_join `test`.`t2` `b` where isnull(`test`.`a`.`a`)
set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
drop table t0,t1,t2;
#
# Bug mdev-7316: a conjunct in WHERE with selectivity == 0
#
CREATE TABLE t1 (a varchar(16), b int, PRIMARY KEY(a), KEY(b)) ENGINE=INNODB;
Warnings:
Warning	1286	Unknown storage engine 'INNODB'
Warning	1266	Using storage engine MyISAM for table 't1'
INSERT INTO t1 VALUES
('USAChinese',10), ('USAEnglish',20), ('USAFrench',30);
CREATE TABLE t2 (i int) ENGINE=INNODB;
Warnings:
Warning	1286	Unknown storage engine 'INNODB'
Warning	1266	Using storage engine MyISAM for table 't2'
INSERT INTO t2 VALUES
(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(1),(2),(3),(4);
ANALYZE TABLE t1, t2;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
EXPLAIN EXTENDED
SELECT * FROM t1, t2
WHERE  a <> 'USARussian' AND b IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ref	PRIMARY,b	b	5	const	1	100.00	Using index condition; Using where
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	14	100.00	Using join buffer (flat, BNL join)
Warnings:
Note	1003	select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`i` AS `i` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` <> 'USARussian') and isnull(`test`.`t1`.`b`))
SELECT * FROM t1, t2
WHERE a <> 'USARussian' AND b IS NULL;
a	b	i
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-11096: range condition over column without statistical data
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
create table t1(col1 char(32));
insert into t1 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t1 persistent for columns () indexes ();
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
explain extended 
select * from t1 where col1 > 'b' and col1 < 'e';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
Warnings:
Note	1003	select `test`.`t1`.`col1` AS `col1` from `test`.`t1` where ((`test`.`t1`.`col1` > 'b') and (`test`.`t1`.`col1` < 'e'))
select * from t1 where col1 > 'b' and col1 < 'e';
col1
c
d
drop table t1;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-9628: unindexed blob column without min-max statistics 
#                with optimizer_use_condition_selectivity=3
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
create table t1(col1 char(32));
insert into t1 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
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(col1 text);
insert into t2 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t2;
Table	Op	Msg_type	Msg_text
test.t2	analyze	status	Engine-independent statistics collected
test.t2	analyze	status	OK
select * from t1 where col1 > 'b' and col1 < 'd';
col1
c
explain extended 
select * from t1 where col1 > 'b' and col1 < 'd';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	8	28.57	Using where
Warnings:
Note	1003	select `test`.`t1`.`col1` AS `col1` from `test`.`t1` where ((`test`.`t1`.`col1` > 'b') and (`test`.`t1`.`col1` < 'd'))
select * from t2 where col1 > 'b' and col1 < 'd';
col1
c
explain extended 
select * from t2 where col1 > 'b' and col1 < 'd';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	8	100.00	Using where
Warnings:
Note	1003	select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where ((`test`.`t2`.`col1` > 'b') and (`test`.`t2`.`col1` < 'd'))
select * from t2 where col1 < 'b' and col1 > 'd';
col1
explain extended 
select * from t2 where col1 < 'b' and col1 > 'd';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
Warnings:
Note	1003	select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where 0
drop table t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-11364: IS NULL over not nullable datetime column
#                 in mergeable derived
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=4;
set HISTOGRAM_SIZE = 255;
CREATE TABLE t1 (t TIME, d DATE NOT NULL);
INSERT INTO t1 VALUES ('10:00:00', '0000-00-00'),('11:00:00','0000-00-00');
ANALYZE TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	analyze	status	Engine-independent statistics collected
test.t1	analyze	status	OK
SELECT * FROM (SELECT t FROM t1 WHERE d IS NULL) sq;
t
10:00:00
11:00:00
DROP TABLE t1;
set histogram_size=@save_histogram_size;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;