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func_group.result, func_group.test: 

  Added tests for extended max/min optimization
opt_sum.cc:
  Extended min/max optimization


sql/opt_sum.cc:
  Extended min/max optimization
mysql-test/t/func_group.test:
  Added tests for extended max/min optimization
mysql-test/r/func_group.result:
  Added tests for extended max/min optimization
parent ea058779
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mysql-test/r/func_group.result
View file @ c015eb9c
......@@ -179,6 +179,17 @@ explain select max(t1.a1), max(t2.a2) from t1, t2;
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
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;
a1 a2 a1 a2
10 aaa AAA 10
10 NULL AAA 10
10 bbb AAA 10
20 zzz AAA 10
10 aaa BBB 20
10 NULL BBB 20
10 bbb BBB 20
20 zzz BBB 20
select max(t1.a1), max(t2.a1) from t1, t2 where t2.a2=9;
max(t1.a1) max(t2.a1)
NULL NULL
......@@ -188,19 +199,252 @@ NULL NULL
select t1.a1, t1.a2, t2.a1, t2.a2 from t1 left outer join t2 on t1.a1=10;
a1 a2 a1 a2
10 aaa AAA 10
10 aaa BBB 20
10 NULL AAA 10
10 NULL BBB 20
10 bbb AAA 10
10 bbb BBB 20
20 zzz NULL NULL
select max(t1.a2) from t1 left outer join t2 on t1.a1=10;
max(t1.a2)
zzz
select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=20;
max(t1.a2)
zzz
select max(t1.a2) from t1 left outer join t2 on t1.a1=10 where t1.a1=10;
max(t1.a2)
bbb
select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=20;
max(t2.a1)
BBB
select max(t2.a1) from t2 left outer join t1 on t2.a2=10 where t2.a2=10;
max(t2.a1)
AAA
select max(t2.a1) from t1 left outer join t2 on t1.a2=t2.a1 and 1=0 where t2.a1='AAA';
max(t2.a1)
NULL
select max(t1.a2),max(t2.a1) from t1 left outer join t2 on t1.a1=10;
max(t1.a2) max(t2.a1)
zzz BBB
drop table t1,t2;
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)
);
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);
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');
select * from t1;
a1 a2 a3 a4 a5
AME 0 SEA 0.1 1942-02-19
HBR 1 SEA 0.085 1948-03-05
BOT 2 SEA 0.085 1951-11-29
BMC 3 SEA 0.085 1958-09-08
TWU 0 LAX 0.08 1969-10-05
BDL 0 DEN 0.08 1960-11-27
DTX 1 NYC 0.08 1961-05-04
PLS 1 WDC 0.075 1949-01-02
ZAJ 2 CHI 0.075 1960-06-15
VVV 2 MIN 0.075 1959-06-28
GTM 3 DAL 0.07 1977-09-23
SSJ NULL CHI NULL 1974-03-19
KKK 3 ATL NULL NULL
XXX NULL MIN NULL NULL
select * from t2;
a1 a2 a3 a4
TKF Seattle WA AME
LCC Los Angeles CA TWU
DEN Denver CO BDL
SDC San Diego CA TWU
NOL New Orleans LA GTM
LAK Los Angeles CA TWU
explain
select min(a1) from t1;
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;
min(a1)
AME
explain
select max(a4) from t1;
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(a4) from t1;
max(a4)
0.1
explain
select min(a5), max(a5) from t1;
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(a5), max(a5) from t1;
min(a5) max(a5)
1942-02-19 1977-09-23
explain
select min(a3) from t1 where a2 = 2;
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;
min(a3)
CHI
explain
select min(a1), max(a1) from t1 where a4 = 0.080;
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 a4 = 0.080;
min(a1) max(a1)
BDL TWU
explain
select min(t1.a5), max(t2.a3) from t1, t2;
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(t1.a5), max(t2.a3) from t1, t2;
min(t1.a5) max(t2.a3)
1942-02-19 WA
explain
select min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 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 min(t1.a3), max(t2.a2) from t1, t2 where t1.a2 = 0 and t2.a3 = 'CA';
min(t1.a3) max(t2.a2)
DEN San Diego
explain
select min(a1) from t1 where a1 > 'KKK';
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';
min(a1)
PLS
explain
select min(a1) from t1 where a1 >= 'KKK';
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';
min(a1)
KKK
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 NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
select max(a3) from t1 where a2 = 2 and a3 < 'SEA';
max(a3)
MIN
explain
select max(a5) from t1 where a5 < date'1970-01-01';
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(a5) from t1 where a5 < date'1970-01-01';
max(a5)
1969-10-05
explain
select max(a3) from t1 where a2 is null;
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;
max(a3)
MIN
explain
select max(a3) from t1 where a2 = 0 and a3 between 'K' and 'Q';
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 = 0 and a3 between 'K' and 'Q';
max(a3)
LAX
explain
select min(a1), max(a1) from t1 where a1 between 'A' and 'P';
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';
min(a1) max(a1)
AME KKK
explain
select max(a3) from t1 where a3 < 'SEA' and a2 = 2 and a3 <= 'MIN';
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';
max(a3)
MIN
explain
select max(a3) from t1 where a3 = 'SEA' 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 Select tables optimized away
select max(a3) from t1 where a3 = 'SEA' and a2 = 2;
max(a3)
SEA
explain
select max(a3) from t1 where a3 = 'DEN' 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 No matching min/max row
select max(a3) from t1 where a3 = 'DEN' and a2 = 2;
max(a3)
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;
mysql-test/t/func_group.test
View file @ c015eb9c
......@@ -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;
\ No newline at end of file
sql/opt_sum.cc
View file @ c015eb9c
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