Commit cc6d65b8 authored by unknown's avatar unknown
Browse files

Bug 4531: unique key prefix interacts poorly with utf8 

Check HEAP+HASH, binary collation
parent cba27e4a

mysql-test/r/ctype_utf8.result

+36 −0
Original line number Diff line number Diff line
@@ -470,6 +470,42 @@ ERROR 23000: Duplicate entry 'ꪪꪪ' for key 1 
drop table t1;

create table t1 (

c char(10) character set utf8 collate utf8_bin,

unique key a using hash (c(1))

) engine=heap;

show create table t1;

Table	Create Table

t1	CREATE TABLE `t1` (

  `c` char(10) character set utf8 collate utf8_bin default NULL,

  UNIQUE KEY `a` (`c`(1))

) ENGINE=HEAP DEFAULT CHARSET=latin1

insert into t1 values ('a'),('b'),('c'),('d'),('e'),('f');

insert into t1 values ('aa');

ERROR 23000: Duplicate entry 'aa' for key 1

insert into t1 values ('aaa');

ERROR 23000: Duplicate entry 'aaa' for key 1

insert into t1 values ('б');

insert into t1 values ('бб');

ERROR 23000: Duplicate entry 'б' for key 1

insert into t1 values ('ббб');

ERROR 23000: Duplicate entry 'б' for key 1

select c as c_all from t1 order by c;

c_all

a

b

c

d

e

f

б

select c as c_a from t1 where c='a';

c_a

a

select c as c_a from t1 where c='б';

c_a

б

drop table t1;

create table t1 (

c char(10) character set utf8 collate utf8_bin,

unique key a using btree (c(1))

) engine=heap;

show create table t1;

mysql-test/t/ctype_utf8.test

+19 −21
Original line number Diff line number Diff line
@@ -349,27 +349,25 @@ drop table t1; 
# Bug 4531: unique key prefix interacts poorly with utf8

# Check HEAP+HASH, binary collation

#

# This doesn't work correctly yet.

#

#create table t1 (

#c char(10) character set utf8 collate utf8_bin,

#unique key a using hash (c(1))

#) engine=heap;

#show create table t1;

#insert into t1 values ('a'),('b'),('c'),('d'),('e'),('f');

#--error 1062

#insert into t1 values ('aa');

#--error 1062

#insert into t1 values ('aaa');

#insert into t1 values ('б');

#--error 1062

#insert into t1 values ('бб');

#--error 1062

#insert into t1 values ('ббб');

#select c as c_all from t1 order by c;

#select c as c_a from t1 where c='a';

#select c as c_a from t1 where c='б';

#drop table t1;

create table t1 (

c char(10) character set utf8 collate utf8_bin,

unique key a using hash (c(1))

) engine=heap;

show create table t1;

insert into t1 values ('a'),('b'),('c'),('d'),('e'),('f');

--error 1062

insert into t1 values ('aa');

--error 1062

insert into t1 values ('aaa');

insert into t1 values ('б');

--error 1062

insert into t1 values ('бб');

--error 1062

insert into t1 values ('ббб');

select c as c_all from t1 order by c;

select c as c_a from t1 where c='a';

select c as c_a from t1 where c='б';

drop table t1;



#

# Bug 4531: unique key prefix interacts poorly with utf8

sql/ha_heap.cc

+1 −1
Original line number Diff line number Diff line
@@ -430,7 +430,7 @@ int ha_heap::create(const char *name, TABLE *table_arg, 
      {

	if (!f_is_packed(flag) &&

	    f_packtype(flag) == (int) FIELD_TYPE_DECIMAL &&

	    !(flag & FIELDFLAG_BINARY))

	    !(field->charset() == &my_charset_bin))

	  seg->type= (int) HA_KEYTYPE_TEXT;

	else

	  seg->type= (int) HA_KEYTYPE_BINARY;