drop table if exists t1;
set names latin2;
select 'A' = 'a' collate latin2_czech_cs;
'A' = 'a' collate latin2_czech_cs
0
create table t1 (
id  int(5) not null,    
tt  char(255) not null
) character set latin2 collate latin2_czech_cs;
insert into t1 values (1,'Aa');
insert into t1 values (2,'Aas');
alter table t1 add primary key aaa(tt);
select * from t1 where tt like 'Aa%';
id	tt
1	Aa
2	Aas
select * from t1 ignore index (primary) where tt like 'Aa%';
id	tt
1	Aa
2	Aas
select * from t1 where tt like '%Aa%';
id	tt
1	Aa
2	Aas
select * from t1 where tt like 'AA%';
id	tt
select * from t1 ignore index (primary) where tt like 'AA%';
id	tt
select * from t1 where tt like '%AA%';
id	tt
