mirror of
https://github.com/MariaDB/server.git
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Merge ibabaev@work.mysql.com:/home/bk/mysql-4.1
into hundin.mysql.fi:/home/igor/dev/mysql-4.1
This commit is contained in:
unknown
@ -179,6 +179,17 @@ explain select max(t1.a1), max(t2.a2) from t1, t2;
|
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No matching min/max row
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insert into t2 values('AAA', 10, 0.5);
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insert into t2 values('BBB', 20, 1.0);
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select t1.a1, t1.a2, t2.a1, t2.a2 from t1,t2;
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a1 a2 a1 a2
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10 aaa AAA 10
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10 NULL AAA 10
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10 bbb AAA 10
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20 zzz AAA 10
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10 aaa BBB 20
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10 NULL BBB 20
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10 bbb BBB 20
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20 zzz BBB 20
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select max(t1.a1), max(t2.a1) from t1, t2 where t2.a2=9;
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max(t1.a1) max(t2.a1)
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NULL NULL
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@ -188,19 +199,252 @@ NULL NULL
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select t1.a1, t1.a2, t2.a1, t2.a2 from t1 left outer join t2 on t1.a1=10;
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a1 a2 a1 a2
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10 aaa AAA 10
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10 aaa BBB 20
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10 NULL AAA 10
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10 NULL BBB 20
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10 bbb AAA 10
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10 bbb BBB 20
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20 zzz NULL NULL
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10;
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max(t1.a2)
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zzz
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=20;
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max(t1.a2)
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zzz
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select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=10;
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max(t1.a2)
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bbb
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select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=20;
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max(t2.a1)
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BBB
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select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=10;
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max(t2.a1)
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AAA
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select max(t2.a1) from t1 left outer join t2 on t1.a2=t2.a1 and 1=0 where t2.a1='AAA';
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max(t2.a1)
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NULL
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select max(t1.a2),max(t2.a1) from t1 left outer join t2 on t1.a1=10;
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max(t1.a2) max(t2.a1)
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zzz BBB
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drop table t1,t2;
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create table t1(
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a1 char(3) primary key,
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a2 smallint,
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a3 char(3),
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a4 real,
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a5 date,
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key k1(a2,a3),
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key k2(a4 desc,a1),
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key k3(a5,a1)
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);
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create table t2(
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a1 char(3) primary key,
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a2 char(17),
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a3 char(2),
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a4 char(3),
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key k1(a3, a2),
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key k2(a4)
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||||
);
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insert into t1 values('AME',0,'SEA',0.100,date'1942-02-19');
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insert into t1 values('HBR',1,'SEA',0.085,date'1948-03-05');
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insert into t1 values('BOT',2,'SEA',0.085,date'1951-11-29');
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insert into t1 values('BMC',3,'SEA',0.085,date'1958-09-08');
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insert into t1 values('TWU',0,'LAX',0.080,date'1969-10-05');
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insert into t1 values('BDL',0,'DEN',0.080,date'1960-11-27');
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insert into t1 values('DTX',1,'NYC',0.080,date'1961-05-04');
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insert into t1 values('PLS',1,'WDC',0.075,date'1949-01-02');
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insert into t1 values('ZAJ',2,'CHI',0.075,date'1960-06-15');
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insert into t1 values('VVV',2,'MIN',0.075,date'1959-06-28');
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insert into t1 values('GTM',3,'DAL',0.070,date'1977-09-23');
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insert into t1 values('SSJ',null,'CHI',null,date'1974-03-19');
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insert into t1 values('KKK',3,'ATL',null,null);
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insert into t1 values('XXX',null,'MIN',null,null);
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insert into t2 values('TKF','Seattle','WA','AME');
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insert into t2 values('LCC','Los Angeles','CA','TWU');
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insert into t2 values('DEN','Denver','CO','BDL');
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insert into t2 values('SDC','San Diego','CA','TWU');
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insert into t2 values('NOL','New Orleans','LA','GTM');
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insert into t2 values('LAK','Los Angeles','CA','TWU');
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select * from t1;
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a1 a2 a3 a4 a5
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AME 0 SEA 0.1 1942-02-19
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HBR 1 SEA 0.085 1948-03-05
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BOT 2 SEA 0.085 1951-11-29
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BMC 3 SEA 0.085 1958-09-08
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TWU 0 LAX 0.08 1969-10-05
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BDL 0 DEN 0.08 1960-11-27
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DTX 1 NYC 0.08 1961-05-04
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PLS 1 WDC 0.075 1949-01-02
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ZAJ 2 CHI 0.075 1960-06-15
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VVV 2 MIN 0.075 1959-06-28
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GTM 3 DAL 0.07 1977-09-23
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SSJ NULL CHI NULL 1974-03-19
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KKK 3 ATL NULL NULL
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XXX NULL MIN NULL NULL
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select * from t2;
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a1 a2 a3 a4
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TKF Seattle WA AME
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LCC Los Angeles CA TWU
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DEN Denver CO BDL
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SDC San Diego CA TWU
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NOL New Orleans LA GTM
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LAK Los Angeles CA TWU
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explain
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select min(a1) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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select min(a1) from t1;
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min(a1)
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AME
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explain
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select max(a4) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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select max(a4) from t1;
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max(a4)
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0.1
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explain
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select min(a5), max(a5) from t1;
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||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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||||
select min(a5), max(a5) from t1;
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min(a5) max(a5)
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||||
1942-02-19 1977-09-23
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||||
explain
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select min(a3) from t1 where a2 = 2;
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||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select min(a3) from t1 where a2 = 2;
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min(a3)
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||||
CHI
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||||
explain
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select min(a1), max(a1) from t1 where a4 = 0.080;
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||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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||||
select min(a1), max(a1) from t1 where a4 = 0.080;
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min(a1) max(a1)
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BDL TWU
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explain
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select min(t1.a5), max(t2.a3) from t1, t2;
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id select_type table type possible_keys key key_len ref rows Extra
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||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select min(t1.a5), max(t2.a3) from t1, t2;
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min(t1.a5) max(t2.a3)
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1942-02-19 WA
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explain
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select min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 and t2.a3 = 'CA';
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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||||
select min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 and t2.a3 = 'CA';
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min(t1.a3) max(t2.a2)
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DEN San Diego
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explain
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select min(a1) from t1 where a1 > 'KKK';
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select min(a1) from t1 where a1 > 'KKK';
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min(a1)
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PLS
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explain
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select min(a1) from t1 where a1 >= 'KKK';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
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select min(a1) from t1 where a1 >= 'KKK';
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min(a1)
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KKK
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explain
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select max(a3) from t1 where a2 = 2 and a3 < 'SEA';
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id select_type table type possible_keys key key_len ref rows Extra
|
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
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select max(a3) from t1 where a2 = 2 and a3 < 'SEA';
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max(a3)
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MIN
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explain
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select max(a5) from t1 where a5 < date'1970-01-01';
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id select_type table type possible_keys key key_len ref rows Extra
|
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a5) from t1 where a5 < date'1970-01-01';
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max(a5)
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1969-10-05
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explain
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select max(a3) from t1 where a2 is null;
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a3) from t1 where a2 is null;
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max(a3)
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MIN
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explain
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select max(a3) from t1 where a2 = 0 and a3 between 'K' and 'Q';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a3) from t1 where a2 = 0 and a3 between 'K' and 'Q';
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max(a3)
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LAX
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explain
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select min(a1), max(a1) from t1 where a1 between 'A' and 'P';
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select min(a1), max(a1) from t1 where a1 between 'A' and 'P';
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min(a1) max(a1)
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AME KKK
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explain
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select max(a3) from t1 where a3 < 'SEA' and a2 = 2 and a3 <= 'MIN';
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a3) from t1 where a3 < 'SEA' and a2 = 2 and a3 <= 'MIN';
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max(a3)
|
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MIN
|
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explain
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select max(a3) from t1 where a3 = 'SEA' and a2 = 2;
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a3) from t1 where a3 = 'SEA' and a2 = 2;
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max(a3)
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SEA
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explain
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||||
select max(a3) from t1 where a3 = 'DEN' and a2 = 2;
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||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No matching min/max row
|
||||
select max(a3) from t1 where a3 = 'DEN' and a2 = 2;
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max(a3)
|
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NULL
|
||||
explain
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 = 'CA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 = 'CA';
|
||||
max(t1.a3) min(t2.a2)
|
||||
CHI Los Angeles
|
||||
explain
|
||||
select max(a3) from t1 where a2 is null and a2 = 2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||||
select max(a3) from t1 where a2 is null and a2 = 2;
|
||||
max(a3)
|
||||
NULL
|
||||
explain
|
||||
select max(a2) from t1 where a2 >= 1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select max(a2) from t1 where a2 >= 1;
|
||||
max(a2)
|
||||
3
|
||||
explain
|
||||
select min(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
select min(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
min(a3)
|
||||
CHI
|
||||
explain
|
||||
select min(a1) from t1 where a1 > 'KKK' or a1 < 'XXX';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 0 NULL 15 Using where; Using index
|
||||
explain
|
||||
select min(a1) from t1 where a1 != 'KKK';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 3 NULL 14 Using where; Using index
|
||||
explain
|
||||
select max(a3) from t1 where a2 < 2 and a3 < 'SEA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range k1 k1 3 NULL 5 Using where; Using index
|
||||
explain
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range k1 k1 7 NULL 1 Using where; Using index
|
||||
1 SIMPLE t2 range k1 k1 3 NULL 4 Using where; Using index
|
||||
drop table if exists t1, t2;
|
||||
|
||||
@ -121,11 +121,158 @@ explain select min(a2) from t1;
|
||||
explain select max(t1.a1), max(t2.a2) from t1, t2;
|
||||
|
||||
insert into t2 values('AAA', 10, 0.5);
|
||||
insert into t2 values('BBB', 20, 1.0);
|
||||
select t1.a1, t1.a2, t2.a1, t2.a2 from t1,t2;
|
||||
|
||||
select max(t1.a1), max(t2.a1) from t1, t2 where t2.a2=9;
|
||||
select max(t2.a1), max(t1.a1) from t1, t2 where t2.a2=9;
|
||||
select t1.a1, t1.a2, t2.a1, t2.a2 from t1 left outer join t2 on t1.a1=10;
|
||||
select max(t1.a2) from t1 left outer join t2 on t1.a1=10;
|
||||
select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=20;
|
||||
select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=10;
|
||||
select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=20;
|
||||
select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=10;
|
||||
select max(t2.a1) from t1 left outer join t2 on t1.a2=t2.a1 and 1=0 where t2.a1='AAA';
|
||||
select max(t1.a2),max(t2.a1) from t1 left outer join t2 on t1.a1=10;
|
||||
drop table t1,t2;
|
||||
|
||||
|
||||
#
|
||||
# Tests to check MIN/MAX query optimization
|
||||
#
|
||||
|
||||
# Create database schema
|
||||
create table t1(
|
||||
a1 char(3) primary key,
|
||||
a2 smallint,
|
||||
a3 char(3),
|
||||
a4 real,
|
||||
a5 date,
|
||||
key k1(a2,a3),
|
||||
key k2(a4 desc,a1),
|
||||
key k3(a5,a1)
|
||||
);
|
||||
create table t2(
|
||||
a1 char(3) primary key,
|
||||
a2 char(17),
|
||||
a3 char(2),
|
||||
a4 char(3),
|
||||
key k1(a3, a2),
|
||||
key k2(a4)
|
||||
);
|
||||
|
||||
# Populate table t1
|
||||
insert into t1 values('AME',0,'SEA',0.100,date'1942-02-19');
|
||||
insert into t1 values('HBR',1,'SEA',0.085,date'1948-03-05');
|
||||
insert into t1 values('BOT',2,'SEA',0.085,date'1951-11-29');
|
||||
insert into t1 values('BMC',3,'SEA',0.085,date'1958-09-08');
|
||||
insert into t1 values('TWU',0,'LAX',0.080,date'1969-10-05');
|
||||
insert into t1 values('BDL',0,'DEN',0.080,date'1960-11-27');
|
||||
insert into t1 values('DTX',1,'NYC',0.080,date'1961-05-04');
|
||||
insert into t1 values('PLS',1,'WDC',0.075,date'1949-01-02');
|
||||
insert into t1 values('ZAJ',2,'CHI',0.075,date'1960-06-15');
|
||||
insert into t1 values('VVV',2,'MIN',0.075,date'1959-06-28');
|
||||
insert into t1 values('GTM',3,'DAL',0.070,date'1977-09-23');
|
||||
insert into t1 values('SSJ',null,'CHI',null,date'1974-03-19');
|
||||
insert into t1 values('KKK',3,'ATL',null,null);
|
||||
insert into t1 values('XXX',null,'MIN',null,null);
|
||||
|
||||
# Populate table t2
|
||||
insert into t2 values('TKF','Seattle','WA','AME');
|
||||
insert into t2 values('LCC','Los Angeles','CA','TWU');
|
||||
insert into t2 values('DEN','Denver','CO','BDL');
|
||||
insert into t2 values('SDC','San Diego','CA','TWU');
|
||||
insert into t2 values('NOL','New Orleans','LA','GTM');
|
||||
insert into t2 values('LAK','Los Angeles','CA','TWU');
|
||||
|
||||
# Show the table contents
|
||||
select * from t1;
|
||||
select * from t2;
|
||||
|
||||
# Queries with min/max functions
|
||||
# which regular min/max optimization are applied to
|
||||
|
||||
explain
|
||||
select min(a1) from t1;
|
||||
select min(a1) from t1;
|
||||
explain
|
||||
select max(a4) from t1;
|
||||
select max(a4) from t1;
|
||||
explain
|
||||
select min(a5), max(a5) from t1;
|
||||
select min(a5), max(a5) from t1;
|
||||
explain
|
||||
select min(a3) from t1 where a2 = 2;
|
||||
select min(a3) from t1 where a2 = 2;
|
||||
explain
|
||||
select min(a1), max(a1) from t1 where a4 = 0.080;
|
||||
select min(a1), max(a1) from t1 where a4 = 0.080;
|
||||
|
||||
explain
|
||||
select min(t1.a5), max(t2.a3) from t1, t2;
|
||||
select min(t1.a5), max(t2.a3) from t1, t2;
|
||||
explain
|
||||
select min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 and t2.a3 = 'CA';
|
||||
select min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 and t2.a3 = 'CA';
|
||||
|
||||
# Queries with min/max functions
|
||||
# which extended min/max optimization are applied to
|
||||
|
||||
explain
|
||||
select min(a1) from t1 where a1 > 'KKK';
|
||||
select min(a1) from t1 where a1 > 'KKK';
|
||||
explain
|
||||
select min(a1) from t1 where a1 >= 'KKK';
|
||||
select min(a1) from t1 where a1 >= 'KKK';
|
||||
explain
|
||||
select max(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
select max(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
explain
|
||||
select max(a5) from t1 where a5 < date'1970-01-01';
|
||||
select max(a5) from t1 where a5 < date'1970-01-01';
|
||||
explain
|
||||
select max(a3) from t1 where a2 is null;
|
||||
select max(a3) from t1 where a2 is null;
|
||||
explain
|
||||
select max(a3) from t1 where a2 = 0 and a3 between 'K' and 'Q';
|
||||
select max(a3) from t1 where a2 = 0 and a3 between 'K' and 'Q';
|
||||
explain
|
||||
select min(a1), max(a1) from t1 where a1 between 'A' and 'P';
|
||||
select min(a1), max(a1) from t1 where a1 between 'A' and 'P';
|
||||
explain
|
||||
select max(a3) from t1 where a3 < 'SEA' and a2 = 2 and a3 <= 'MIN';
|
||||
select max(a3) from t1 where a3 < 'SEA' and a2 = 2 and a3 <= 'MIN';
|
||||
explain
|
||||
select max(a3) from t1 where a3 = 'SEA' and a2 = 2;
|
||||
select max(a3) from t1 where a3 = 'SEA' and a2 = 2;
|
||||
explain
|
||||
select max(a3) from t1 where a3 = 'DEN' and a2 = 2;
|
||||
select max(a3) from t1 where a3 = 'DEN' and a2 = 2;
|
||||
|
||||
explain
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 = 'CA';
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 = 'CA';
|
||||
|
||||
explain
|
||||
select max(a3) from t1 where a2 is null and a2 = 2;
|
||||
select max(a3) from t1 where a2 is null and a2 = 2;
|
||||
|
||||
explain
|
||||
select max(a2) from t1 where a2 >= 1;
|
||||
select max(a2) from t1 where a2 >= 1;
|
||||
explain
|
||||
select min(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
select min(a3) from t1 where a2 = 2 and a3 < 'SEA';
|
||||
|
||||
# Queries to which max/min optimization is not applied
|
||||
|
||||
explain
|
||||
select min(a1) from t1 where a1 > 'KKK' or a1 < 'XXX';
|
||||
explain
|
||||
select min(a1) from t1 where a1 != 'KKK';
|
||||
explain
|
||||
select max(a3) from t1 where a2 < 2 and a3 < 'SEA';
|
||||
explain
|
||||
select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA';
|
||||
|
||||
|
||||
# Clean up
|
||||
drop table if exists t1, t2;
|
||||
Reference in New Issue
Block a user