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drop table if exists t1;
create table t1 (
a char(3) character set latin1 collate latin1_bin primary key
) engine=ndb;
insert into t1 values('aAa');
insert into t1 values('aaa');
insert into t1 values('AAA');
select * from t1 order by a;
a
AAA
aAa
aaa
select * from t1 where a = 'aAa';
a
aAa
select * from t1 where a = 'aaa';
a
aaa
select * from t1 where a = 'AaA';
a
select * from t1 where a = 'AAA';
a
AAA
drop table t1;
create table t1 (
a char(3) character set latin1 collate latin1_swedish_ci primary key
) engine=ndb;
insert into t1 values('aAa');
insert into t1 values('aaa');
ERROR 23000: Duplicate entry 'aaa' for key 1
insert into t1 values('AAA');
ERROR 23000: Duplicate entry 'AAA' for key 1
select * from t1 order by a;
a
aAa
select * from t1 where a = 'aAa';
a
aAa
select * from t1 where a = 'aaa';
a
aAa
select * from t1 where a = 'AaA';
a
aAa
select * from t1 where a = 'AAA';
a
aAa
drop table t1;
create table t1 (
p int primary key,
a char(3) character set latin1 collate latin1_bin not null,
unique key(a)
) engine=ndb;
insert into t1 values(1, 'aAa');
insert into t1 values(2, 'aaa');
insert into t1 values(3, 'AAA');
select * from t1 order by p;
p a
1 aAa
2 aaa
3 AAA
select * from t1 where a = 'aAa';
p a
1 aAa
select * from t1 where a = 'aaa';
p a
2 aaa
select * from t1 where a = 'AaA';
p a
select * from t1 where a = 'AAA';
p a
3 AAA
drop table t1;
create table t1 (
p int primary key,
a char(3) character set latin1 collate latin1_swedish_ci not null,
unique key(a)
) engine=ndb;
insert into t1 values(1, 'aAa');
insert into t1 values(2, 'aaa');
ERROR 23000: Duplicate entry '2' for key 1
insert into t1 values(3, 'AAA');
ERROR 23000: Duplicate entry '3' for key 1
select * from t1 order by p;
p a
1 aAa
select * from t1 where a = 'aAa';
p a
1 aAa
select * from t1 where a = 'aaa';
p a
1 aAa
select * from t1 where a = 'AaA';
p a
1 aAa
select * from t1 where a = 'AAA';
p a
1 aAa
drop table t1;
create table t1 (
p int primary key,
a char(3) character set latin1 collate latin1_bin not null,
index(a)
) engine=ndb;
insert into t1 values(1, 'aAa');
insert into t1 values(2, 'aaa');
insert into t1 values(3, 'AAA');
insert into t1 values(4, 'aAa');
insert into t1 values(5, 'aaa');
insert into t1 values(6, 'AAA');
select * from t1 order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
explain select * from t1 where a = 'zZz' order by p;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 3 const 10 Using where; Using filesort
select * from t1 where a = 'aAa' order by p;
p a
1 aAa
4 aAa
select * from t1 where a = 'aaa' order by p;
p a
2 aaa
5 aaa
select * from t1 where a = 'AaA' order by p;
p a
select * from t1 where a = 'AAA' order by p;
p a
3 AAA
6 AAA
drop table t1;
create table t1 (
p int primary key,
a char(3) character set latin1 collate latin1_swedish_ci not null,
index(a)
) engine=ndb;
insert into t1 values(1, 'aAa');
insert into t1 values(2, 'aaa');
insert into t1 values(3, 'AAA');
insert into t1 values(4, 'aAa');
insert into t1 values(5, 'aaa');
insert into t1 values(6, 'AAA');
select * from t1 order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
explain select * from t1 where a = 'zZz' order by p;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref a a 3 const 10 Using where; Using filesort
select * from t1 where a = 'aAa' order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
select * from t1 where a = 'aaa' order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
select * from t1 where a = 'AaA' order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
select * from t1 where a = 'AAA' order by p;
p a
1 aAa
2 aaa
3 AAA
4 aAa
5 aaa
6 AAA
drop table t1;
create table t1 (
a varchar(10) primary key
) engine=ndb;
insert into t1 values ('jonas % ');
replace into t1 values ('jonas % ');
replace into t1 values ('jonas % ');
select * from t1;
a
jonas %
drop table t1;
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