mirror of
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Merge.
This commit is contained in:
Igor Babaev
@ -73,7 +73,7 @@ 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 region ALL PRIMARY NULL NULL NULL 5 20.00 Using where; Using join buffer (flat, BNL join)
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1 PRIMARY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00 Using where
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1 PRIMARY supplier ALL PRIMARY,i_s_nationkey NULL NULL NULL 10 80.00 Using where; Using join buffer (flat, BNL join)
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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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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 PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00
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@ -114,7 +114,7 @@ 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 part ALL PRIMARY NULL NULL NULL 200 2.08 Using where; Using join buffer (flat, BNL join)
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1 PRIMARY partsupp ref PRIMARY,i_ps_partkey,i_ps_suppkey PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00 Using where
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1 PRIMARY supplier ALL PRIMARY,i_s_nationkey NULL NULL NULL 10 80.00 Using where; Using join buffer (flat, BNL join)
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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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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 PRIMARY 4 dbt3_s001.part.p_partkey 3 100.00
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@ -164,7 +164,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY supplier index PRIMARY PRIMARY 4 NULL 10 100.00
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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_shipdate 4 NULL 228 100.00 Using where; Using temporary; Using filesort
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2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 228 100.00
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2 SUBQUERY <derived4> ALL NULL NULL NULL NULL 227 100.00
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4 DERIVED lineitem range i_l_shipdate i_l_shipdate 4 NULL 228 100.00 Using where; Using temporary; Using filesort
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Warnings:
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Note 1003 select `dbt3_s001`.`supplier`.`s_suppkey` AS `s_suppkey`,`dbt3_s001`.`supplier`.`s_name` AS `s_name`,`dbt3_s001`.`supplier`.`s_address` AS `s_address`,`dbt3_s001`.`supplier`.`s_phone` AS `s_phone`,`revenue0`.`total_revenue` AS `total_revenue` from `dbt3_s001`.`supplier` join `dbt3_s001`.`revenue0` where ((`revenue0`.`supplier_no` = `dbt3_s001`.`supplier`.`s_suppkey`) and (`revenue0`.`total_revenue` = (select max(`revenue0`.`total_revenue`) from `dbt3_s001`.`revenue0`))) order by `dbt3_s001`.`supplier`.`s_suppkey`
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@ -357,13 +357,13 @@ and o_orderkey = l_orderkey
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group by c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice
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order by o_totalprice desc, o_orderdate;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY orders ALL PRIMARY,i_o_custkey NULL NULL NULL 1500 100.00 Using where; Using temporary; Using filesort
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 dbt3_s001.orders.o_orderkey 1 100.00
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6005 0.00 Using temporary; Using filesort
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1 PRIMARY orders eq_ref PRIMARY,i_o_custkey PRIMARY 4 <subquery2>.l_orderkey 1 100.00 Using where
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1 PRIMARY customer eq_ref PRIMARY PRIMARY 4 dbt3_s001.orders.o_custkey 1 100.00
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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
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1 PRIMARY lineitem ref PRIMARY,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 <subquery2>.l_orderkey 4 100.00
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2 MATERIALIZED lineitem index NULL PRIMARY 8 NULL 6005 100.00
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Warnings:
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Note 1003 select `dbt3_s001`.`customer`.`c_name` AS `c_name`,`dbt3_s001`.`customer`.`c_custkey` AS `c_custkey`,`dbt3_s001`.`orders`.`o_orderkey` AS `o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE` AS `o_orderdate`,`dbt3_s001`.`orders`.`o_totalprice` AS `o_totalprice`,sum(`dbt3_s001`.`lineitem`.`l_quantity`) AS `sum(l_quantity)` from <materialize> (select `dbt3_s001`.`lineitem`.`l_orderkey` from `dbt3_s001`.`lineitem` group by `dbt3_s001`.`lineitem`.`l_orderkey` having (sum(`dbt3_s001`.`lineitem`.`l_quantity`) > 250)) join `dbt3_s001`.`customer` join `dbt3_s001`.`orders` join `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`customer`.`c_custkey` = `dbt3_s001`.`orders`.`o_custkey`) and (`<subquery2>`.`l_orderkey` = `dbt3_s001`.`orders`.`o_orderkey`) and (`dbt3_s001`.`lineitem`.`l_orderkey` = `dbt3_s001`.`orders`.`o_orderkey`)) group by `dbt3_s001`.`customer`.`c_name`,`dbt3_s001`.`customer`.`c_custkey`,`dbt3_s001`.`orders`.`o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE`,`dbt3_s001`.`orders`.`o_totalprice` order by `dbt3_s001`.`orders`.`o_totalprice` desc,`dbt3_s001`.`orders`.`o_orderDATE`
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Note 1003 select `dbt3_s001`.`customer`.`c_name` AS `c_name`,`dbt3_s001`.`customer`.`c_custkey` AS `c_custkey`,`dbt3_s001`.`orders`.`o_orderkey` AS `o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE` AS `o_orderdate`,`dbt3_s001`.`orders`.`o_totalprice` AS `o_totalprice`,sum(`dbt3_s001`.`lineitem`.`l_quantity`) AS `sum(l_quantity)` from <materialize> (select `dbt3_s001`.`lineitem`.`l_orderkey` from `dbt3_s001`.`lineitem` group by `dbt3_s001`.`lineitem`.`l_orderkey` having (sum(`dbt3_s001`.`lineitem`.`l_quantity`) > 250)) join `dbt3_s001`.`customer` join `dbt3_s001`.`orders` join `dbt3_s001`.`lineitem` where ((`dbt3_s001`.`customer`.`c_custkey` = `dbt3_s001`.`orders`.`o_custkey`) and (`dbt3_s001`.`orders`.`o_orderkey` = `<subquery2>`.`l_orderkey`) and (`dbt3_s001`.`lineitem`.`l_orderkey` = `<subquery2>`.`l_orderkey`)) group by `dbt3_s001`.`customer`.`c_name`,`dbt3_s001`.`customer`.`c_custkey`,`dbt3_s001`.`orders`.`o_orderkey`,`dbt3_s001`.`orders`.`o_orderDATE`,`dbt3_s001`.`orders`.`o_totalprice` order by `dbt3_s001`.`orders`.`o_totalprice` desc,`dbt3_s001`.`orders`.`o_orderDATE`
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select
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c_name, c_custkey, o_orderkey, o_orderdate, o_totalprice, sum(l_quantity)
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from customer, orders, lineitem
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@ -798,9 +798,10 @@ explain extended
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select * from t1 where a in ( select b from t2 ) AND ( a > 3 );
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 1 0.00 Using where
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 0.00 Using where; FirstMatch(t1); Using join buffer (flat, BNL join)
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
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2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 0.00
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (`test`.`t1`.`a` > 3))
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Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` > 3))
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select * from t1 where a in ( select b from t2 ) AND ( a > 3 );
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a
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drop table t1,t2;
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@ -1228,5 +1229,75 @@ Note 1003 select `test`.`language`.`lang_group` AS `lang_group`,`test`.`language
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set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
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drop table language, country, continent;
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set use_stat_tables=@save_use_stat_tables;
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#
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# Bug mdev-5191: performance degradation due to a suboptimal chosen plan
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# when optimizer_use_condition_selectivity=3
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#
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set use_stat_tables = 'preferably';
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set @@RAND_SEED1=810763568, @@RAND_SEED2=600681772;
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set TIMESTAMP=1394806993;
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create table t1 (a int, b int) engine=myisam;
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insert t1 values (rand()*1e5, rand()*1e5);
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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insert t1 select rand()*1e5, rand()*1e5 from t1;
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create table t2 (c int, d int, key(c), key(d)) engine=myisam;
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insert t2 select floor(rand()*1e5/2)*2, floor(rand()*1e5/3)*3 from t1;
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analyze table t1,t2;
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Table Op Msg_type Msg_text
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test.t1 analyze status OK
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test.t2 analyze status Table is already up to date
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set optimizer_use_condition_selectivity=1;
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explain extended
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select * from t1, t2, t1 as t3
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where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
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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 262144 100.00 Using where
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1 SIMPLE t2 ref c,d c 5 test.t1.b 5 100.00
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1 SIMPLE t3 ALL NULL NULL NULL NULL 262144 100.00 Using where; Using join buffer (flat, BNL join)
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Warnings:
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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))
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select * from t1, t2, t1 as t3
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where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
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a b c d a b
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1495 89366 89366 28296 28296 3
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961 24512 24512 85239 85239 4
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1063 89366 89366 28296 28296 3
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221 56120 56120 28296 28296 3
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set optimizer_use_condition_selectivity=3;
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explain extended
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select * from t1, t2, t1 as t3
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where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t3 ALL NULL NULL NULL NULL 262144 0.00 Using where
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1 SIMPLE t2 ref c,d d 5 test.t3.a 7 100.00
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1 SIMPLE t1 ALL NULL NULL NULL NULL 262144 2.00 Using where; Using join buffer (flat, BNL join)
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Warnings:
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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))
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select * from t1, t2, t1 as t3
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where t1.b=t2.c and t2.d=t3.a and t3.b<5 and t1.a < 2000;
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a b c d a b
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961 24512 24512 85239 85239 4
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1495 89366 89366 28296 28296 3
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1063 89366 89366 28296 28296 3
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221 56120 56120 28296 28296 3
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set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
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drop table t1,t2;
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set use_stat_tables=@save_use_stat_tables;
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set optimizer_switch=@save_optimizer_switch_for_selectivity_test;
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SET SESSION STORAGE_ENGINE=DEFAULT;
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