func_group.test

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

#
# simple test of all group functions
#

--disable_warnings
drop table if exists t1,t2;
--enable_warnings

set @sav_dpi= @@div_precision_increment;
set div_precision_increment= 5;
show variables like 'div_precision_increment';
create table t1 (grp int, a bigint unsigned, c char(10) not null);
insert into t1 values (1,1,"a");
insert into t1 values (2,2,"b");
insert into t1 values (2,3,"c");
insert into t1 values (3,4,"E");
insert into t1 values (3,5,"C");
insert into t1 values (3,6,"D");

# Test of MySQL field extension with and without matching records.
select a,c,sum(a) from t1 group by a;
select a,c,sum(a) from t1 where a > 10 group by a;
select sum(a) from t1 where a > 10;
select a from t1 order by rand(10);
select distinct a from t1 order by rand(10);
select count(distinct a),count(distinct grp) from t1;
insert into t1 values (null,null,'');
select count(distinct a),count(distinct grp) from t1;

select sum(all a),count(all a),avg(all a),std(all a),variance(all a),bit_or(all a),bit_and(all a),min(all a),max(all a),min(all c),max(all c) from t1;
select grp, sum(a),count(a),avg(a),std(a),variance(a),bit_or(a),bit_and(a),min(a),max(a),min(c),max(c) from t1 group by grp;
select grp, sum(a)+count(a)+avg(a)+std(a)+variance(a)+bit_or(a)+bit_and(a)+min(a)+max(a)+min(c)+max(c) as sum from t1 group by grp;

create table t2 (grp int, a bigint unsigned, c char(10));
insert into t2 select grp,max(a)+max(grp),max(c) from t1 group by grp;

# REPLACE ... SELECT doesn't yet work with PS
replace into t2 select grp, a, c from t1 limit 2,1;
select * from t2;

drop table t1,t2;

#
# Problem with std()
#

CREATE TABLE t1 (id int(11),value1 float(10,2));
INSERT INTO t1 VALUES (1,0.00),(1,1.00), (1,2.00), (2,10.00), (2,11.00), (2,12.00); 
CREATE TABLE t2 (id int(11),name char(20)); 
INSERT INTO t2 VALUES (1,'Set One'),(2,'Set Two'); 
select id, avg(value1), std(value1), variance(value1) from t1 group by id;
select name, avg(value1), std(value1), variance(value1) from t1, t2 where t1.id = t2.id group by t1.id;
drop table t1,t2;

#
# Test of bug in left join & avg
#

create table t1 (id int not null);
create table t2 (id int not null,rating int null);
insert into t1 values(1),(2),(3);
insert into t2 values(1, 3),(2, NULL),(2, NULL),(3, 2),(3, NULL);
select t1.id, avg(rating) from t1 left join t2 on ( t1.id = t2.id ) group by t1.id;
# Test different types with avg()
select sql_small_result t2.id, avg(rating) from t2 group by t2.id;
select sql_big_result t2.id, avg(rating) from t2 group by t2.id;
select sql_small_result t2.id, avg(rating+0.0e0) from t2 group by t2.id;
select sql_big_result t2.id, avg(rating+0.0e0) from t2 group by t2.id;
drop table t1,t2;

#
# test of count
#
create table t1 (a smallint(6) primary key, c char(10), b text);
INSERT INTO t1 VALUES (1,'1','1');
INSERT INTO t1 VALUES (2,'2','2');
INSERT INTO t1 VALUES (4,'4','4');

select count(*) from t1;
select count(*) from t1 where a = 1;
select count(*) from t1 where a = 100;
select count(*) from t1 where a >= 10;
select count(a) from t1 where a = 1;
select count(a) from t1 where a = 100;
select count(a) from t1 where a >= 10;
select count(b) from t1 where b >= 2;
select count(b) from t1 where b >= 10;
select count(c) from t1 where c = 10;
drop table t1;

#
# Test of bug in COUNT(i)*(i+0)
#

CREATE TABLE t1 (d DATETIME, i INT);
INSERT INTO t1 VALUES (NOW(), 1);
SELECT COUNT(i), i, COUNT(i)*i FROM t1 GROUP BY i;
SELECT COUNT(i), (i+0), COUNT(i)*(i+0) FROM t1 GROUP BY i; 
DROP TABLE t1;

#
# Another SUM() problem with 3.23.2
#

create table t1 (
        num float(5,2),
        user char(20)
);
insert into t1 values (10.3,'nem'),(20.53,'monty'),(30.23,'sinisa');
insert into t1 values (30.13,'nem'),(20.98,'monty'),(10.45,'sinisa');
insert into t1 values (5.2,'nem'),(8.64,'monty'),(11.12,'sinisa');
select sum(num) from t1;
select sum(num) from t1 group by user;
drop table t1;

#
# Test problem with MIN() optimization in case of null values
#

create table t1 (a1 int, a2 char(3), key k1(a1), key k2(a2));
insert into t1 values(10,'aaa'), (10,null), (10,'bbb'), (20,'zzz');
create table t2(a1 char(3), a2 int, a3 real, key k1(a1), key k2(a2, a1));
select * from t1;
# The following returned NULL in 4.0.10
select min(a2) from t1;
select max(t1.a1), max(t2.a2) from t1, t2;
select max(t1.a1) from t1, t2;
select max(t2.a2), max(t1.a1) from t1, t2;

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(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;

#
# Test of group function and NULL values
#

CREATE TABLE t1 (a int, b int);
select count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1;
select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
insert into t1 values (1,null);
select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
insert into t1 values (1,null);
insert into t1 values (2,null);
select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
insert into t1 values (2,1);
select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
insert into t1 values (3,1);
select a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b) from t1 group by a;
select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b), bit_xor(b) from t1 group by a;
explain extended select SQL_BIG_RESULT a,count(b), sum(b), avg(b), std(b), min(b), max(b), bit_and(b), bit_or(b), bit_xor(b) from t1 group by a;
drop table t1;

#
# Bug #1972: test for bit_and(), bit_or() and negative values
# 
create table t1 (col int);
insert into t1 values (-1), (-2), (-3);
select bit_and(col), bit_or(col) from t1;
select SQL_BIG_RESULT bit_and(col), bit_or(col) from t1 group by col;
drop table t1;

#
# Bug #3376: avg() and an empty table
#

create table t1 (a int);
select avg(2) from t1;
drop table t1;

#
# 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);
insert into t1 values('WWW',1,'LED',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');
insert into t2 values('AAA','AAA','AA','AME');

# 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 = 'MIN' and a2 = 2;
select max(a3) from t1 where a3 = 'MIN' 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';

explain
select min(a3) from t1 where a2 = 4;
select min(a3) from t1 where a2 = 4;
explain
select min(a3) from t1 where a2 = 2 and a3 > 'SEA';
select min(a3) from t1 where a2 = 2 and a3 > 'SEA';
explain
select (min(a4)+max(a4))/2 from t1;
select (min(a4)+max(a4))/2 from t1;
explain
select min(a3) from t1 where 2 = a2;
select min(a3) from t1 where 2 = a2;
explain
select max(a3) from t1 where a2 = 2 and 'SEA' > a3;
select max(a3) from t1 where a2 = 2 and 'SEA' > a3;
explain
select max(a3) from t1 where a2 = 2 and 'SEA' < a3;
select max(a3) from t1 where a2 = 2 and 'SEA' < a3;
explain
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI';
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI';
explain
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI' and a3 < 'SEA';
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI' and a3 < 'SEA';
explain
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI' and a3 = 'MIN';
select min(a3) from t1 where a2 = 2 and a3 >= 'CHI' and a3 = 'MIN';
explain
select min(a3) from t1 where a2 = 2 and a3 >= 'SEA' and a3 = 'MIN';
select min(a3) from t1 where a2 = 2 and a3 >= 'SEA' and a3 = 'MIN';

explain
select min(t1.a1), min(t2.a4) from t1,t2 where t1.a1 < 'KKK' and t2.a4 < 'KKK';
select min(t1.a1), min(t2.a4) from t1,t2 where t1.a1 < 'KKK' and t2.a4 < 'KKK';

# Queries to which max/min optimization is not applied

explain 
select min(a1) from t1 where a1 > 'KKK' or a1 < 'XXX';