mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-16 12:02:42 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
mariadb/mysql-test/r/selectivity_innodb.result

1543 lines
81 KiB
Text
Raw Blame History

SET SESSION STORAGE_ENGINE='InnoDB';
set @save_optimizer_switch_for_selectivity_test=@@optimizer_switch;
set optimizer_switch='extended_keys=on';
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 `test`.`t1`.`a` is null
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 region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using join buffer (flat, BNL join)
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
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`.`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`
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 part ALL PRIMARY NULL NULL NULL 200 2.08 Using where; Using join buffer (flat, BNL join)
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
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`.`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 index PRIMARY PRIMARY 4 NULL 10 100.00
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 229 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 229 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 229 100.00 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 index PRIMARY PRIMARY 4 NULL 10 100.00
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 229 100.00 Using where; Using temporary; Using filesort
2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 228 100.00
4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 229 100.00 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 i_ps_partkey 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 `dbt3_s001`.`part`.`p_type` not like 'SMALL POLISHED%' and `dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8) and !<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 i_ps_partkey 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 `dbt3_s001`.`part`.`p_type` not like 'SMALL POLISHED%' and `dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8) and !<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 i_ps_partkey 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 `dbt3_s001`.`part`.`p_type` not like 'SMALL POLISHED%' and `dbt3_s001`.`part`.`p_size` in (49,37,27,5,40,6,22,8) and !<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 PRIMARY 8 NULL 6005 100.00
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 PRIMARY 8 NULL 6005 100.00
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 !<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 !<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 <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED part ALL PRIMARY NULL NULL NULL 200 4.17 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 14.40 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_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 OK
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 <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED part ALL PRIMARY NULL NULL NULL 200 7.03 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 14.40 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_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 OK
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 <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED part ALL PRIMARY NULL NULL NULL 200 7.81 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 14.40 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_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 OK
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 <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED part ALL PRIMARY NULL NULL NULL 200 7.81 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 14.40 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_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 1 100.00 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 t1 ALL NULL NULL NULL NULL 1 0.00 Using where
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 0.00
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` > 3
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 OK
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 t1 range a a 5 NULL 1 0.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 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` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` > 9
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 `test`.`t1`.`a` is null
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 `test`.`t1`.`a` is null 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 `test`.`t1`.`a` is null 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 `test`.`country`.`country_group` is null
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
1063 89366 89366 28296 28296 3
1495 89366 89366 28296 28296 3
221 56120 56120 28296 28296 3
961 24512 24512 85239 85239 4
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
1063 89366 89366 28296 28296 3
1495 89366 89366 28296 28296 3
221 56120 56120 28296 28296 3
961 24512 24512 85239 85239 4
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 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 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 `test`.`a`.`a` is null
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));
INSERT INTO t1 VALUES
('USAChinese',10), ('USAEnglish',20), ('USAFrench',30);
CREATE TABLE t2 (i int);
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 2 66.67 Using where; Using index
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 `test`.`t1`.`b` is null
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;
set optimizer_switch=@save_optimizer_switch_for_selectivity_test;
set @tmp_ust= @@use_stat_tables;
set @tmp_oucs= @@optimizer_use_condition_selectivity;
#
# MDEV-6808: MariaDB 10.0.13 crash with optimizer_use_condition_selectivity > 1
#
set @tmp_mdev6808= @@optimizer_use_condition_selectivity;
SET optimizer_use_condition_selectivity = 2;
CREATE TABLE t1 (
event_id int(11) unsigned NOT NULL AUTO_INCREMENT,
PRIMARY KEY (event_id)
) ENGINE=InnoDB;
CREATE TABLE t2 (
repost_id int(11) unsigned NOT NULL AUTO_INCREMENT,
subject_type varchar(24) CHARACTER SET latin1 COLLATE latin1_general_ci NOT NULL,
subject_id int(11) unsigned NOT NULL,
object_type varchar(24) CHARACTER SET latin1 COLLATE latin1_general_ci NOT NULL,
object_id int(11) unsigned NOT NULL,
is_private int(1) NOT NULL DEFAULT '0',
PRIMARY KEY (repost_id),
UNIQUE KEY `BETWEEN` (subject_type,subject_id,object_type,object_id,is_private),
KEY SUBJECT (subject_type,subject_id),
KEY OBJECT (object_type,object_id)
) ENGINE=InnoDB;
SELECT
*
FROM
t2, t1
WHERE
t2.object_type = 'event' AND
t2.object_id = t1.event_id AND
t2.is_private = 0 AND
t2.subject_id = 127994 AND
t2.subject_type in ('user')
;
repost_id subject_type subject_id object_type object_id is_private event_id
DROP TABLE t1, t2;
set optimizer_use_condition_selectivity=@tmp_mdev6808;
#
# MDEV-6442: Assertion `join->best_read < double(...)' failed with optimizer_use_condition_selectivity >=3, ...
#
SET use_stat_tables = PREFERABLY;
SET optimizer_use_condition_selectivity = 3;
CREATE TABLE t1 ( a VARCHAR(3), b VARCHAR(8), KEY (a,b) ) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('USA','Chinese'),('USA','English');
CREATE TABLE t2 (i INT) ENGINE=InnoDB;
SELECT * FROM t1, t2 WHERE ( 't', 'o' ) IN (
SELECT t1_2.b, t1_1.a FROM t1 AS t1_1 STRAIGHT_JOIN t1 AS t1_2 ON ( t1_2.a = t1_1.b )
);
a b i
DROP TABLE t1,t2;
#
# MDEV-6738: use_stat_table + histograms crashing optimizer
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=4;
# Need innodb because there is a special kind of field_bit for non-myisam tables
create table t1(col1 int, col2 bit(1) DEFAULT NULL) engine=innodb;
select * from t1 where col2 != true;
col1 col2
drop table t1;
#
# MDEV-7413: optimizer_use_condition_selectivity > 2 crashes 10.0.15+maria-1~wheezy
#
CREATE TABLE t1 (
parent_id int,
child_group_id int,
child_user_id int,
KEY (parent_id,child_group_id,child_user_id)
) ENGINE=InnoDB;
CREATE TABLE t2 (
id int,
lower_group_name varchar(255),
directory_id int(20),
UNIQUE KEY (directory_id)
) ENGINE=InnoDB;
CREATE TABLE t3 (id int) ENGINE=InnoDB;
insert into t1 values (1,1,1),(2,2,2);
insert into t2 values (10,'foo',10),(20,'bar',20);
insert into t3 values (101),(102);
set use_stat_tables = PREFERABLY, optimizer_use_condition_selectivity = 3;
select * from t1, t2, t3
where t1.child_user_id=t3.id and t1.child_group_id is null and t2.lower_group_name='foo' and t1.parent_id=t2.id and t2.directory_id=10;
parent_id child_group_id child_user_id id lower_group_name directory_id id
drop table t1,t2,t3;
#
# End of 10.0 tests
#
set use_stat_tables= @tmp_ust;
set optimizer_use_condition_selectivity= @tmp_oucs;
SET SESSION STORAGE_ENGINE=DEFAULT;
Reference in a new issue View git blame Copy permalink