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1968 lines
98 KiB
Text
1968 lines
98 KiB
Text
drop table if exists t0,t1,t2,t3;
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select @@global.use_stat_tables;
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@@global.use_stat_tables
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COMPLEMENTARY
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select @@session.use_stat_tables;
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@@session.use_stat_tables
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COMPLEMENTARY
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set @save_use_stat_tables=@@use_stat_tables;
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set use_stat_tables='preferably';
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set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
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set @save_histogram_size=@@histogram_size;
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set @save_histogram_type=@@histogram_type;
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set join_cache_level=2;
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set @@global.histogram_size=0,@@local.histogram_size=0;
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set histogram_type='single_prec_hb';
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set optimizer_use_condition_selectivity=3;
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create table t1 (a int);
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insert into t1 values
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(9), (3), (2), (NULL), (NULL), (2), (NULL), (1), (5), (NULL);
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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select * from mysql.column_stats;
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db_name table_name column_name min_value max_value nulls_ratio avg_length avg_frequency hist_size hist_type histogram
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test t1 a 1 9 0.4000 4.0000 1.2000 0 NULL NULL
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flush table t1;
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explain extended
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select * from t1 where a is null;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 40.00 Using where
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` is null
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explain extended
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select * from t1 where a is not null;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 60.00 Using where
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` is not null
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drop table t1;
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set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
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DROP DATABASE IF EXISTS dbt3_s001;
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CREATE DATABASE dbt3_s001;
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use dbt3_s001;
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=== Q2 ===
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set optimizer_use_condition_selectivity=5;
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explain extended
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select
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s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment
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from
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part, supplier, partsupp, nation, region
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where
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p_partkey = ps_partkey
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and s_suppkey = ps_suppkey
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and p_size = 9
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and p_type like '%TIN'
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and s_nationkey = n_nationkey
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and n_regionkey = r_regionkey
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and r_name = 'ASIA'
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and ps_supplycost = (
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select
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min(ps_supplycost)
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from
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partsupp, supplier, nation, region
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where
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p_partkey = ps_partkey
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and s_suppkey = ps_suppkey
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and s_nationkey = n_nationkey
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and n_regionkey = r_regionkey
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and r_name = 'ASIA'
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)
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order by
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s_acctbal desc, n_name, s_name, p_partkey;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 0.31 Using where; Using temporary; Using filesort
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1 PRIMARY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey i_ps_partkey 4 dbt3_s001.part.p_partkey 3 100.00 Using where
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1 PRIMARY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
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1 PRIMARY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where
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1 PRIMARY region eq_ref PRIMARY PRIMARY 4 dbt3_s001.nation.n_regionkey 1 20.00 Using where
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2 DEPENDENT SUBQUERY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where
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2 DEPENDENT SUBQUERY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey i_ps_partkey 4 dbt3_s001.part.p_partkey 3 100.00
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2 DEPENDENT SUBQUERY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
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2 DEPENDENT SUBQUERY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'dbt3_s001.part.p_partkey' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ 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#2 */ 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`
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set optimizer_use_condition_selectivity=4;
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explain extended
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select
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s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment
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from
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part, supplier, partsupp, nation, region
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where
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p_partkey = ps_partkey
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and s_suppkey = ps_suppkey
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and p_size = 9
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and p_type like '%TIN'
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and s_nationkey = n_nationkey
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and n_regionkey = r_regionkey
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and r_name = 'ASIA'
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and ps_supplycost = (
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select
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min(ps_supplycost)
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from
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partsupp, supplier, nation, region
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where
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p_partkey = ps_partkey
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and s_suppkey = ps_suppkey
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and s_nationkey = n_nationkey
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and n_regionkey = r_regionkey
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and r_name = 'ASIA'
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)
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order by
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s_acctbal desc, n_name, s_name, p_partkey;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using temporary; Using filesort
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1 PRIMARY nation ref PRIMARY,i_n_regionkey i_n_regionkey 5 dbt3_s001.region.r_regionkey 5 100.00
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1 PRIMARY supplier ref PRIMARY,i_s_nationkey i_s_nationkey 5 dbt3_s001.nation.n_nationkey 1 100.00
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1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 2.08 Using where; Using join buffer (flat, BNL join)
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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
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2 DEPENDENT SUBQUERY region ALL PRIMARY NULL NULL NULL 5 20.00 Using where
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2 DEPENDENT SUBQUERY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey i_ps_partkey 4 dbt3_s001.part.p_partkey 3 100.00
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2 DEPENDENT SUBQUERY supplier eq_ref PRIMARY,i_s_nationkey PRIMARY 4 dbt3_s001.partsupp.ps_suppkey 1 100.00 Using where
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2 DEPENDENT SUBQUERY nation eq_ref PRIMARY,i_n_regionkey PRIMARY 4 dbt3_s001.supplier.s_nationkey 1 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'dbt3_s001.part.p_partkey' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ 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#2 */ 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`
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=== Q15 ===
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create view revenue0 (supplier_no, total_revenue) as
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select l_suppkey, sum(l_extendedprice * (1 - l_discount))
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from lineitem
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where
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l_shipdate >= '1995-08-01'
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and l_shipdate < date_add('1995-08-01', interval 90 day)
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group by l_suppkey;
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set @save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='index_condition_pushdown=off';
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set optimizer_use_condition_selectivity=1;
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EXPLAIN EXTENDED select s_suppkey, s_name, s_address, s_phone, total_revenue
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from supplier, revenue0
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where s_suppkey = supplier_no
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and total_revenue = (select max(total_revenue) from revenue0)
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order by s_suppkey;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY supplier ALL PRIMARY NULL NULL NULL 10 100.00 Using filesort
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1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
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3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 269 100.00 Using where; Using temporary; Using filesort
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2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 269 100.00
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4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 269 100.00 Using where; Using temporary; Using filesort
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Warnings:
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Note 1003 /* select#1 */ 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#2 */ select max(`revenue0`.`total_revenue`) from `dbt3_s001`.`revenue0`) order by `dbt3_s001`.`supplier`.`s_suppkey`
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select s_suppkey, s_name, s_address, s_phone, total_revenue
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from supplier, revenue0
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where s_suppkey = supplier_no
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and total_revenue = (select max(total_revenue) from revenue0)
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order by s_suppkey;
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s_suppkey s_name s_address s_phone total_revenue
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1 Supplier#000000001 N kD4on9OM Ipw3,gf0JBoQDd7tgrzrddZ 27-918-335-1736 729084.7773
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set optimizer_use_condition_selectivity=3;
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EXPLAIN EXTENDED select s_suppkey, s_name, s_address, s_phone, total_revenue
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from supplier, revenue0
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where s_suppkey = supplier_no
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and total_revenue = (select max(total_revenue) from revenue0)
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order by s_suppkey;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY supplier ALL PRIMARY NULL NULL NULL 10 100.00 Using filesort
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1 PRIMARY <derived3> ref key0 key0 5 dbt3_s001.supplier.s_suppkey 10 100.00 Using where
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3 DERIVED lineitem range i_l_shipdate,i_l_suppkey i_l_shipdate 4 NULL 269 100.00 Using where; Using temporary; Using filesort
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2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 269 100.00
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4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 269 100.00 Using where; Using temporary; Using filesort
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Warnings:
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Note 1003 /* select#1 */ 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#2 */ select max(`revenue0`.`total_revenue`) from `dbt3_s001`.`revenue0`) order by `dbt3_s001`.`supplier`.`s_suppkey`
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select s_suppkey, s_name, s_address, s_phone, total_revenue
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from supplier, revenue0
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where s_suppkey = supplier_no
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and total_revenue = (select max(total_revenue) from revenue0)
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order by s_suppkey;
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s_suppkey s_name s_address s_phone total_revenue
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1 Supplier#000000001 N kD4on9OM Ipw3,gf0JBoQDd7tgrzrddZ 27-918-335-1736 729084.7773
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set optimizer_switch=@save_optimizer_switch;
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drop view revenue0;
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=== Q16 ===
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set optimizer_use_condition_selectivity=1;
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EXPLAIN EXTENDED select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
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from partsupp, part
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where p_partkey = ps_partkey
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and p_brand <> 'Brand#11'
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and p_type not like 'SMALL POLISHED%'
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and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
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and ps_suppkey not in (select s_suppkey from supplier
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where s_comment like '%Customer%Complaints%')
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group by p_brand, p_type, p_size
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order by supplier_cnt desc, p_brand, p_type, p_size;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY part ALL PRIMARY NULL NULL NULL 200 100.00 Using where; Using temporary; Using filesort
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1 PRIMARY partsupp ref PRIMARY,i_ps_partkey PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00 Using where; Using index
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2 MATERIALIZED supplier ALL PRIMARY NULL NULL NULL 10 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ 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#2 */ 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`
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select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
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from partsupp, part
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where p_partkey = ps_partkey
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and p_brand <> 'Brand#11'
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and p_type not like 'SMALL POLISHED%'
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and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
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and ps_suppkey not in (select s_suppkey from supplier
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where s_comment like '%Customer%Complaints%')
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group by p_brand, p_type, p_size
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order by supplier_cnt desc, p_brand, p_type, p_size;
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p_brand p_type p_size supplier_cnt
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Brand#21 MEDIUM ANODIZED TIN 8 4
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Brand#22 PROMO PLATED TIN 5 4
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Brand#24 MEDIUM BURNISHED NICKEL 6 4
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Brand#24 SMALL ANODIZED STEEL 40 4
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Brand#32 MEDIUM BURNISHED BRASS 49 4
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Brand#33 MEDIUM POLISHED BRASS 49 4
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Brand#41 STANDARD BRUSHED NICKEL 40 4
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Brand#44 PROMO POLISHED STEEL 5 4
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Brand#45 PROMO ANODIZED BRASS 22 4
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Brand#53 STANDARD BRUSHED STEEL 27 4
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Brand#54 MEDIUM POLISHED BRASS 22 4
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Brand#54 STANDARD ANODIZED BRASS 22 4
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Brand#13 LARGE BRUSHED STEEL 8 2
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Brand#25 ECONOMY BURNISHED COPPER 27 2
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Brand#44 STANDARD PLATED TIN 37 1
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Brand#51 ECONOMY POLISHED STEEL 49 1
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set optimizer_use_condition_selectivity=3;
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EXPLAIN EXTENDED select p_brand, p_type, p_size, count(distinct ps_suppkey) as supplier_cnt
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from partsupp, part
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where p_partkey = ps_partkey
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and p_brand <> 'Brand#11'
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and p_type not like 'SMALL POLISHED%'
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and p_size in (49, 37, 27, 5, 40, 6, 22, 8)
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and ps_suppkey not in (select s_suppkey from supplier
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where s_comment like '%Customer%Complaints%')
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group by p_brand, p_type, p_size
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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#1 */ 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#2 */ 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#1 */ 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#2 */ 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 customer eq_ref PRIMARY PRIMARY 4 dbt3_s001.orders.o_custkey 1 100.00
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 dbt3_s001.orders.o_orderkey 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#1 */ 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#2 */ 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 orders ALL PRIMARY,i_o_custkey NULL NULL NULL 1500 100.00 Using where; Using temporary; Using filesort
|
|
1 PRIMARY customer eq_ref PRIMARY PRIMARY 4 dbt3_s001.orders.o_custkey 1 100.00
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 dbt3_s001.orders.o_orderkey 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#1 */ 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#2 */ 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
|
|
=== 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#1 */ 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#3 */ 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,<expr_cache><`dbt3_s001`.`customer`.`c_custkey`>(exists(/* select#4 */ select 1 from `dbt3_s001`.`orders` where `dbt3_s001`.`orders`.`o_custkey` = `dbt3_s001`.`customer`.`c_custkey` limit 1))) 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#1 */ 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#3 */ 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,<expr_cache><`dbt3_s001`.`customer`.`c_custkey`>(exists(/* select#4 */ select 1 from `dbt3_s001`.`orders` where `dbt3_s001`.`orders`.`o_custkey` = `dbt3_s001`.`customer`.`c_custkey` limit 1))) 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 i_ps_partkey 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#1 */ 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#4 */ 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#1 */ 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#4 */ 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#1 */ 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#4 */ 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#1 */ 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#4 */ 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#1 */ 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#4 */ 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 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
|
|
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 0.78 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#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where <cache>(<in_optimizer>(1,exists(/* select#2 */ select 1 from `test`.`t1` join `test`.`t2` limit 1))) 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 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 1.96 Using where
|
|
1 SIMPLE t2 ref a a 5 test.t1.a 10 100.00
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10
|
|
explain extended
|
|
select * from t1 straight_join t2 where t1.a=t2.a and t2.a<10;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1.96 Using where
|
|
1 SIMPLE t2 ref a a 5 test.t1.a 10 100.00
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t1` straight_join `test`.`t2` where `test`.`t2`.`a` = `test`.`t1`.`a` and `test`.`t1`.`a` < 10
|
|
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 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 `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;
|
|
#
|
|
# 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 Warning Engine-independent statistics are not collected for column 'col1'
|
|
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 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'
|
|
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;
|
|
#
|
|
# MDEV-16374: filtered shows 0 for materilization scan for a semi join, which makes optimizer
|
|
# always pick materialization scan over materialization lookup
|
|
#
|
|
create table t0(a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int, b int);
|
|
insert into t1 values (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10),
|
|
(11,11),(12,12),(13,13),(14,14),(15,15);
|
|
set @@optimizer_use_condition_selectivity=2;
|
|
explain extended select * from t1 where a in (select max(a) from t1 group by b);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 16 100.00 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
|
|
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 16 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from <materialize> (/* select#2 */ select max(`test`.`t1`.`a`) from `test`.`t1` group by `test`.`t1`.`b`) join `test`.`t1` where `<subquery2>`.`max(a)` = `test`.`t1`.`a`
|
|
select * from t1 where a in (select max(a) from t1 group by b);
|
|
a b
|
|
0 0
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
5 5
|
|
6 6
|
|
7 7
|
|
8 8
|
|
9 9
|
|
10 10
|
|
11 11
|
|
12 12
|
|
13 13
|
|
14 14
|
|
15 15
|
|
set @@optimizer_use_condition_selectivity=1;
|
|
explain extended select * from t1 where a in (select max(a) from t1 group by b);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 16 100.00 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
|
|
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 16 100.00 Using temporary
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from <materialize> (/* select#2 */ select max(`test`.`t1`.`a`) from `test`.`t1` group by `test`.`t1`.`b`) join `test`.`t1` where `<subquery2>`.`max(a)` = `test`.`t1`.`a`
|
|
select * from t1 where a in (select max(a) from t1 group by b);
|
|
a b
|
|
0 0
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
5 5
|
|
6 6
|
|
7 7
|
|
8 8
|
|
9 9
|
|
10 10
|
|
11 11
|
|
12 12
|
|
13 13
|
|
14 14
|
|
15 15
|
|
drop table t1,t0;
|
|
set histogram_size=@save_histogram_size;
|
|
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
|
|
set use_stat_tables=@save_use_stat_tables;
|
|
#
|
|
# MDEV-15306: Wrong/Unexpected result with the value
|
|
# optimizer_use_condition_selectivity set to 4
|
|
#
|
|
CREATE TABLE t1 (a INT);
|
|
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
|
|
CREATE FUNCTION f1() RETURNS INT DETERMINISTIC
|
|
BEGIN
|
|
SET @cnt := @cnt + 1;
|
|
RETURN 1;
|
|
END;|
|
|
set @save_optimizer_use_condition_selectivity=@@optimizer_use_condition_selectivity;
|
|
set @save_use_stat_tables= @@use_stat_tables;
|
|
set @@use_stat_tables='complementary';
|
|
set @@optimizer_use_condition_selectivity=4;
|
|
SET @cnt= 0;
|
|
SELECT * FROM t1 WHERE a = f1();
|
|
a
|
|
1
|
|
SELECT @cnt;
|
|
@cnt
|
|
1
|
|
set @@use_stat_tables='preferably';
|
|
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
|
|
SET @cnt := 0;
|
|
set @@optimizer_use_condition_selectivity=4;
|
|
SELECT * FROM t1 WHERE a = f1();
|
|
a
|
|
1
|
|
SELECT @cnt;
|
|
@cnt
|
|
2
|
|
alter table t1 force;
|
|
drop table t1;
|
|
drop function f1;
|
|
#
|
|
# MDEV-19834 Selectivity of an equality condition discounted twice
|
|
#
|
|
create table t1 (a int, b int, key (b), key (a));
|
|
insert into t1
|
|
select (rand(1)*1000)/10, (rand(1001)*1000)/20 from seq_1_to_1000;
|
|
analyze table t1 persistent for all;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Engine-independent statistics collected
|
|
test.t1 analyze status Table is already up to date
|
|
# Check what info the optimizer has about selectivities
|
|
explain extended select * from t1 use index () where a in (17,51,5);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 3.91 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where `test`.`t1`.`a` in (17,51,5)
|
|
explain extended select * from t1 use index () where b=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 2.34 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` USE INDEX () where `test`.`t1`.`b` = 2
|
|
# Now, the equality is used for ref access, while the range condition
|
|
# gives selectivity data
|
|
explain extended select * from t1 where a in (17,51,5) and b=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ref b,a b 5 const 24 2.90 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` = 2 and `test`.`t1`.`a` in (17,51,5)
|
|
drop table t1;
|
|
set use_stat_tables= @save_use_stat_tables;
|
|
set @@histogram_size=@save_histogram_size;
|
|
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
|
|
#
|
|
# MDEV-20576: failing assertion DBUG_ASSERT(0.0 < sel && sel <= 1)
|
|
#
|
|
set @@optimizer_use_condition_selectivity=2;
|
|
set names utf8;
|
|
CREATE DATABASE world;
|
|
use world;
|
|
CREATE TABLE Country (
|
|
Code char(3) NOT NULL default '',
|
|
Name char(52) NOT NULL default '',
|
|
SurfaceArea float(10,2) NOT NULL default '0.00',
|
|
Population int(11) NOT NULL default '0',
|
|
Capital int(11) default NULL,
|
|
PRIMARY KEY (Code),
|
|
UNIQUE INDEX (Name)
|
|
);
|
|
CREATE TABLE City (
|
|
ID int(11) NOT NULL auto_increment,
|
|
Name char(35) NOT NULL default '',
|
|
Country char(3) NOT NULL default '',
|
|
Population int(11) NOT NULL default '0',
|
|
PRIMARY KEY (ID),
|
|
INDEX (Population),
|
|
INDEX (Country)
|
|
);
|
|
CREATE TABLE CountryLanguage (
|
|
Country char(3) NOT NULL default '',
|
|
Language char(30) NOT NULL default '',
|
|
Percentage float(3,1) NOT NULL default '0.0',
|
|
PRIMARY KEY (Country, Language),
|
|
INDEX (Percentage)
|
|
);
|
|
CREATE INDEX Name ON City(Name);
|
|
CREATE INDEX CountryPopulation ON City(Country,Population);
|
|
CREATE INDEX CountryName ON City(Country,Name);
|
|
set @@optimizer_use_condition_selectivity=2;
|
|
EXPLAIN
|
|
SELECT * FROM City WHERE Country='FIN';
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE City ref Country,CountryPopulation,CountryName CountryName 3 const 5 Using index condition
|
|
DROP DATABASE world;
|
|
use test;
|
|
CREATE TABLE t1 (
|
|
a INT,
|
|
b INT NOT NULL,
|
|
c char(100),
|
|
KEY (b, c),
|
|
KEY (b, a, c)
|
|
) ENGINE=MyISAM
|
|
DEFAULT CHARSET = utf8;
|
|
INSERT INTO t1 VALUES
|
|
(1, 1, 1),
|
|
(2, 2, 2),
|
|
(3, 3, 3),
|
|
(4, 4, 4),
|
|
(5, 5, 5),
|
|
(6, 6, 6),
|
|
(7, 7, 7),
|
|
(8, 8, 8),
|
|
(9, 9, 9);
|
|
INSERT INTO t1 SELECT a + 10, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 20, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 40, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 80, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 160, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 320, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 640, b, c FROM t1;
|
|
INSERT INTO t1 SELECT a + 1280, b, c FROM t1 LIMIT 80;
|
|
EXPLAIN
|
|
SELECT a FROM t1 WHERE b = 1 ORDER BY c DESC LIMIT 9;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range b,b_2 b 4 NULL 226 Using where
|
|
SELECT a FROM t1 WHERE b = 1 ORDER BY c DESC LIMIT 9;
|
|
a
|
|
2071
|
|
2061
|
|
2051
|
|
2041
|
|
2031
|
|
2021
|
|
2011
|
|
2001
|
|
1991
|
|
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-20424: New default value for optimizer_use_condition-selectivity
|
|
# leads to bad plan
|
|
#
|
|
create table t1(a int, b int, c int, d int, key(a,b));
|
|
insert into t1 select 50,seq-1,seq-1,seq from seq_1_to_10;
|
|
insert into t1 select seq-1,seq-1,seq-1,seq from seq_1_to_100 limit 90;
|
|
create table t2(a int, b int, c int, primary key(a));
|
|
insert into t2 select seq-1,seq-1,seq-1 from seq_1_to_100;
|
|
create table t3(a int, b int, c int, primary key(a));
|
|
insert into t3 select seq-1,seq-1,seq-1 from seq_1_to_100 limit 30;
|
|
set optimizer_use_condition_selectivity=1;
|
|
explain extended select t1.b,t2.a,t3.a,t3.b from t1,t2,t3
|
|
where t1.c = t2.a AND t1.d = t3.a and t1.a = 50 and t1.b <= 100;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 range a a 10 NULL 9 100.00 Using index condition; Using where
|
|
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.d 1 100.00
|
|
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t2`.`a` = `test`.`t1`.`c` and `test`.`t3`.`a` = `test`.`t1`.`d` and `test`.`t1`.`a` = 50 and `test`.`t1`.`b` <= 100
|
|
select t1.b,t2.a,t3.a,t3.b from t1,t2,t3
|
|
where t1.c = t2.a AND t1.d = t3.a and t1.a = 50 and t1.b <= 100;
|
|
b a a b
|
|
0 0 1 1
|
|
1 1 2 2
|
|
2 2 3 3
|
|
3 3 4 4
|
|
4 4 5 5
|
|
5 5 6 6
|
|
6 6 7 7
|
|
7 7 8 8
|
|
8 8 9 9
|
|
9 9 10 10
|
|
set optimizer_use_condition_selectivity=2;
|
|
explain extended select t1.b,t2.a,t3.a,t3.b from t1,t2,t3
|
|
where t1.c = t2.a AND t1.d = t3.a and t1.a = 50 and t1.b <= 100;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 range a a 10 NULL 9 9.00 Using index condition; Using where
|
|
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.d 1 100.00
|
|
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 100.00 Using index
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t2`.`a` = `test`.`t1`.`c` and `test`.`t3`.`a` = `test`.`t1`.`d` and `test`.`t1`.`a` = 50 and `test`.`t1`.`b` <= 100
|
|
select t1.b,t2.a,t3.a,t3.b from t1,t2,t3
|
|
where t1.c = t2.a AND t1.d = t3.a and t1.a = 50 and t1.b <= 100;
|
|
b a a b
|
|
0 0 1 1
|
|
1 1 2 2
|
|
2 2 3 3
|
|
3 3 4 4
|
|
4 4 5 5
|
|
5 5 6 6
|
|
6 6 7 7
|
|
7 7 8 8
|
|
8 8 9 9
|
|
9 9 10 10
|
|
set optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity;
|
|
drop table t1,t2,t3;
|
|
#
|
|
# MDEV-20519: Query plan regression with optimizer_use_condition_selectivity=4
|
|
#
|
|
create table t1 (id int, a int, PRIMARY KEY(id), key(a));
|
|
insert into t1 select seq,seq from seq_1_to_100;
|
|
create table t2 (id int, a int, b int, PRIMARY KEY(id), key(a), key(b));
|
|
insert into t2 select seq,seq,seq from seq_1_to_100;
|
|
analyze table t1,t2 persistent for all;
|
|
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 Table is already up to date
|
|
set optimizer_switch='exists_to_in=off';
|
|
SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id a
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
5 5
|
|
6 6
|
|
7 7
|
|
8 8
|
|
9 9
|
|
10 10
|
|
11 11
|
|
12 12
|
|
13 13
|
|
14 14
|
|
15 15
|
|
16 16
|
|
17 17
|
|
18 18
|
|
19 19
|
|
set statement optimizer_use_condition_selectivity=2 for explain SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 100 Using where
|
|
3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1
|
|
3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (10%) Using where; Using rowid filter
|
|
set statement optimizer_use_condition_selectivity=4 for explain SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 100 Using where
|
|
3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1
|
|
3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (10%) Using where; Using rowid filter
|
|
set @query="EXPLAIN SELECT * FROM t1 A, t1 B WHERE A.a = B.a and A.id = 65";
|
|
set statement optimizer_use_condition_selectivity=2 for explain SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 100 Using where
|
|
3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1
|
|
3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (10%) Using where; Using rowid filter
|
|
set statement optimizer_use_condition_selectivity=4 for explain SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 100 Using where
|
|
3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1
|
|
3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (10%) Using where; Using rowid filter
|
|
explain SELECT * FROM t1
|
|
WHERE
|
|
EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
|
|
WHERE A.a=t1.a AND t2.b < 20);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 100 Using where
|
|
2 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1
|
|
2 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (10%) Using where; Using rowid filter
|
|
set optimizer_switch= @save_optimizer_switch;
|
|
drop table t1,t2;
|
|
#
|
|
# MDEV-21495: Conditional jump or move depends on uninitialised value in sel_arg_range_seq_next
|
|
#
|
|
CREATE TABLE t1(a INT, b INT);
|
|
INSERT INTO t1 SELECT seq, seq from seq_1_to_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
|
|
SELECT * from t1 WHERE a = 5 and b = 5;
|
|
a b
|
|
5 5
|
|
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
|
|
drop table t1;
|
|
# End of 10.1 tests
|
|
#
|
|
# MDEV-22583: Selectivity for BIT columns in filtered column for EXPLAIN is incorrect
|
|
#
|
|
SET optimizer_use_condition_selectivity=4;
|
|
SET histogram_size=255;
|
|
CREATE TABLE t1 (a BIT(32), b INT);
|
|
INSERT INTO t1 VALUES (80, 80), (81, 81), (82, 82);
|
|
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
|
|
EXPLAIN EXTENDED SELECT * from t1 where t1.a >= 81;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 66.41 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`a` >= 81
|
|
SELECT HEX(a), b from t1 where t1.a >= 81;
|
|
HEX(a) b
|
|
51 81
|
|
52 82
|
|
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
|
|
set histogram_size=@save_histogram_size;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-19474: Histogram statistics are used even with optimizer_use_condition_selectivity=3
|
|
#
|
|
CREATE TABLE t1(a int);
|
|
INSERT INTO t1 values (1),(2),(2),(3),(4);
|
|
SET optimizer_use_condition_selectivity=4;
|
|
SET histogram_size= 255;
|
|
set use_stat_tables='preferably';
|
|
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
|
|
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 39.84 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 2
|
|
SET optimizer_use_condition_selectivity=3;
|
|
# filtered should show 25 %
|
|
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 25.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 2
|
|
FLUSH TABLES;
|
|
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=2;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 25.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 2
|
|
DROP TABLE t1;
|
|
# End of 10.2 tests
|
|
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
|
|
set histogram_size=@save_histogram_size;
|
|
set use_stat_tables= @save_use_stat_tables;
|
|
set @@global.histogram_size=@save_histogram_size;
|