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apply UNIQUE constrain correctly for multi-byte charsets

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only MyISAM is fixed


include/m_ctype.h:
  my_charpos() macro
myisam/mi_key.c:
  apply UNIQUE constrain correctly for multi-byte charsets
mysql-test/r/binary.result:
  new test
mysql-test/r/key.result:
  apply UNIQUE constrain correctly for multi-byte charsets
mysql-test/t/binary.test:
  new test
mysql-test/t/func_gconcat.test:
  make test to pass w/o InnoDB
mysql-test/t/key.test:
  apply UNIQUE constrain correctly for multi-byte charsets
This commit is contained in:
unknown 2004-08-13 18:29:25 +02:00
parent 4a0f586bc7
commit b6f6d5b2fd
7 changed files with 122 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/m_ctype.h
View File

@ -391,8 +391,10 @@ extern my_bool my_parse_charset_xml(const char *bug, uint len,
#define my_strnncoll(s, a, b, c, d) ((s)->coll->strnncoll((s), (a), (b), (c), (d), 0)) #define my_strnncoll(s, a, b, c, d) ((s)->coll->strnncoll((s), (a), (b), (c), (d), 0))
#define my_like_range(s, a, b, c, d, e, f, g, h, i, j) \ #define my_like_range(s, a, b, c, d, e, f, g, h, i, j) \
((s)->coll->like_range((s), (a), (b), (c), (d), (e), (f), (g), (h), (i), (j))) ((s)->coll->like_range((s), (a), (b), (c), (d), (e), (f), (g), (h), (i), (j)))
#define my_wildcmp(cs,s,se,w,we,e,o,m) ((cs)->coll->wildcmp((cs),(s),(se),(w),(we),(e),(o),(m))) #define my_wildcmp(cs,s,se,w,we,e,o,m) ((cs)->coll->wildcmp((cs),(s),(se),(w),(we),(e),(o),(m)))
#define my_strcasecmp(s, a, b) ((s)->coll->strcasecmp((s), (a), (b))) #define my_strcasecmp(s, a, b) ((s)->coll->strcasecmp((s), (a), (b)))
#define my_charpos(cs, b, e, num) (cs)->cset->charpos((cs), (const char*) (b), (const char *)(e), (num))
#define use_mb(s) ((s)->cset->ismbchar != NULL) #define use_mb(s) ((s)->cset->ismbchar != NULL)
#define my_ismbchar(s, a, b) ((s)->cset->ismbchar((s), (a), (b))) #define my_ismbchar(s, a, b) ((s)->cset->ismbchar((s), (a), (b)))

113
myisam/mi_key.c
View File

@ -25,6 +25,10 @@
#define CHECK_KEYS #define CHECK_KEYS
#define FIX_LENGTH if (length > char_length) \
char_length= my_charpos(cs, pos, pos+length, char_length); \
set_if_smaller(char_length,length); \
static int _mi_put_key_in_record(MI_INFO *info,uint keynr,byte *record); static int _mi_put_key_in_record(MI_INFO *info,uint keynr,byte *record);
/* /*
@ -32,20 +36,18 @@ static int _mi_put_key_in_record(MI_INFO *info,uint keynr,byte *record);
** Ret: Length of key ** Ret: Length of key
*/ */
#define my_charpos(cs, b, e, num)\
(cs)->cset->charpos((cs), (const char*) (b), (const char *)(e), (num))
uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key, uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
const byte *record, my_off_t filepos) const byte *record, my_off_t filepos)
{ {
byte *pos,*end; byte *pos,*end;
uchar *start; uchar *start;
reg1 HA_KEYSEG *keyseg; reg1 HA_KEYSEG *keyseg;
my_bool is_unique=info->s->keyinfo[keynr].flag & HA_NOSAME;
DBUG_ENTER("_mi_make_key"); DBUG_ENTER("_mi_make_key");
if(info->s->keyinfo[keynr].flag & HA_SPATIAL) if(info->s->keyinfo[keynr].flag & HA_SPATIAL)
{ {
/* /*
TODO: nulls processing TODO: nulls processing
*/ */
#ifdef HAVE_SPATIAL #ifdef HAVE_SPATIAL
@ -61,7 +63,7 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
enum ha_base_keytype type=(enum ha_base_keytype) keyseg->type; enum ha_base_keytype type=(enum ha_base_keytype) keyseg->type;
uint length=keyseg->length; uint length=keyseg->length;
uint char_length; uint char_length;
CHARSET_INFO *cs; CHARSET_INFO *cs=keyseg->charset;
if (keyseg->null_bit) if (keyseg->null_bit)
{ {
@ -73,15 +75,8 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
*key++=1; /* Not NULL */ *key++=1; /* Not NULL */
} }
char_length= (cs= keyseg->charset) && (cs->mbmaxlen > 1) ? char_length= (is_unique && cs && cs->mbmaxlen > 1) ? length/cs->mbmaxlen : length;
length / cs->mbmaxlen : 0;
if (info->s->keyinfo[keynr].flag & HA_FULLTEXT)
{
/* Ask Serg to make a better fix */
char_length= 0;
}
pos= (byte*) record+keyseg->start; pos= (byte*) record+keyseg->start;
if (keyseg->flag & HA_SPACE_PACK) if (keyseg->flag & HA_SPACE_PACK)
{ {
@ -97,14 +92,10 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
pos++; pos++;
} }
length=(uint) (end-pos); length=(uint) (end-pos);
if (char_length && length > char_length) FIX_LENGTH;
{ store_key_length_inc(key,char_length);
char_length= my_charpos(cs, pos, pos+length, char_length); memcpy((byte*) key,(byte*) pos,(size_t) char_length);
set_if_smaller(length, char_length); key+=char_length;
}
store_key_length_inc(key,length);
memcpy((byte*) key,(byte*) pos,(size_t) length);
key+=length;
continue; continue;
} }
if (keyseg->flag & HA_VAR_LENGTH) if (keyseg->flag & HA_VAR_LENGTH)
@ -112,9 +103,10 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
uint tmp_length=uint2korr(pos); uint tmp_length=uint2korr(pos);
pos+=2; /* Skip VARCHAR length */ pos+=2; /* Skip VARCHAR length */
set_if_smaller(length,tmp_length); set_if_smaller(length,tmp_length);
store_key_length_inc(key,length); FIX_LENGTH;
memcpy((byte*) key, pos, length); store_key_length_inc(key,char_length);
key+= length; memcpy((byte*) key,(byte*) pos,(size_t) char_length);
key+= char_length;
continue; continue;
} }
else if (keyseg->flag & HA_BLOB_PART) else if (keyseg->flag & HA_BLOB_PART)
@ -122,16 +114,10 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
uint tmp_length=_mi_calc_blob_length(keyseg->bit_start,pos); uint tmp_length=_mi_calc_blob_length(keyseg->bit_start,pos);
memcpy_fixed((byte*) &pos,pos+keyseg->bit_start,sizeof(char*)); memcpy_fixed((byte*) &pos,pos+keyseg->bit_start,sizeof(char*));
set_if_smaller(length,tmp_length); set_if_smaller(length,tmp_length);
#if NOT_YET_BLOB_PART FIX_LENGTH;
if (char_length && length > char_length) store_key_length_inc(key,char_length);
{ memcpy((byte*) key,(byte*) pos,(size_t) char_length);
char_length= my_charpos(cs, pos, pos+length, char_length); key+= char_length;
set_if_smaller(length, char_length);
}
#endif
store_key_length_inc(key,length);
memcpy((byte*) key, pos, length);
key+= length;
continue; continue;
} }
else if (keyseg->flag & HA_SWAP_KEY) else if (keyseg->flag & HA_SWAP_KEY)
@ -144,7 +130,7 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
if (isnan(nr)) if (isnan(nr))
{ {
/* Replace NAN with zero */ /* Replace NAN with zero */
bzero(key,length); bzero(key,length);
key+=length; key+=length;
continue; continue;
} }
@ -155,7 +141,7 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
float8get(nr,pos); float8get(nr,pos);
if (isnan(nr)) if (isnan(nr))
{ {
bzero(key,length); bzero(key,length);
key+=length; key+=length;
continue; continue;
} }
@ -168,14 +154,10 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
} }
continue; continue;
} }
#ifdef NOT_YET_FIXED_LENGTH_KEY FIX_LENGTH;
if (char_length && length > char_length) memcpy((byte*) key, pos, char_length);
{ if (length > char_length)
char_length= my_charpos(cs, pos, pos+length, char_length); bfill(key+char_length, length-char_length, ' ');
set_if_smaller(length, char_length);
}
#endif
memcpy((byte*) key, pos, length);
key+= length; key+= length;
} }
_mi_dpointer(info,key,filepos); _mi_dpointer(info,key,filepos);
@ -203,25 +185,27 @@ uint _mi_make_key(register MI_INFO *info, uint keynr, uchar *key,
RETURN RETURN
length of packed key length of packed key
last_use_keyseg Store pointer to the keyseg after the last used one last_use_keyseg Store pointer to the keyseg after the last used one
*/ */
uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old, uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
uint k_length, HA_KEYSEG **last_used_keyseg) uint k_length, HA_KEYSEG **last_used_keyseg)
{ {
uint length; uchar *start_key=key;
uchar *pos,*end,*start_key=key; HA_KEYSEG *keyseg;
reg1 HA_KEYSEG *keyseg; my_bool is_unique=info->s->keyinfo[keynr].flag & HA_NOSAME;
enum ha_base_keytype type;
DBUG_ENTER("_mi_pack_key"); DBUG_ENTER("_mi_pack_key");
start_key=key;
for (keyseg=info->s->keyinfo[keynr].seg ; for (keyseg=info->s->keyinfo[keynr].seg ;
keyseg->type && (int) k_length > 0; keyseg->type && (int) k_length > 0;
old+=keyseg->length, keyseg++) old+=keyseg->length, keyseg++)
{ {
length=min((uint) keyseg->length,(uint) k_length); enum ha_base_keytype type=(enum ha_base_keytype) keyseg->type;
type=(enum ha_base_keytype) keyseg->type; uint length=min((uint) keyseg->length,(uint) k_length);
uint char_length;
uchar *pos;
CHARSET_INFO *cs=keyseg->charset;
if (keyseg->null_bit) if (keyseg->null_bit)
{ {
k_length--; k_length--;
@ -231,10 +215,11 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
continue; /* Found NULL */ continue; /* Found NULL */
} }
} }
char_length= (is_unique && cs && cs->mbmaxlen > 1) ? length/cs->mbmaxlen : length;
pos=old; pos=old;
if (keyseg->flag & HA_SPACE_PACK) if (keyseg->flag & HA_SPACE_PACK)
{ {
end=pos+length; uchar *end=pos+length;
if (type != HA_KEYTYPE_NUM) if (type != HA_KEYTYPE_NUM)
{ {
while (end > pos && end[-1] == ' ') while (end > pos && end[-1] == ' ')
@ -247,9 +232,10 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
} }
k_length-=length; k_length-=length;
length=(uint) (end-pos); length=(uint) (end-pos);
store_key_length_inc(key,length); FIX_LENGTH;
memcpy((byte*) key,pos,(size_t) length); store_key_length_inc(key,char_length);
key+= length; memcpy((byte*) key,pos,(size_t) char_length);
key+= char_length;
continue; continue;
} }
else if (keyseg->flag & (HA_VAR_LENGTH | HA_BLOB_PART)) else if (keyseg->flag & (HA_VAR_LENGTH | HA_BLOB_PART))
@ -257,11 +243,13 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
/* Length of key-part used with mi_rkey() always 2 */ /* Length of key-part used with mi_rkey() always 2 */
uint tmp_length=uint2korr(pos); uint tmp_length=uint2korr(pos);
k_length-= 2+length; k_length-= 2+length;
pos+=2;
set_if_smaller(length,tmp_length); /* Safety */ set_if_smaller(length,tmp_length); /* Safety */
store_key_length_inc(key,length); FIX_LENGTH;
store_key_length_inc(key,char_length);
old+=2; /* Skip length */ old+=2; /* Skip length */
memcpy((byte*) key, pos+2,(size_t) length); memcpy((byte*) key, pos,(size_t) char_length);
key+= length; key+= char_length;
continue; continue;
} }
else if (keyseg->flag & HA_SWAP_KEY) else if (keyseg->flag & HA_SWAP_KEY)
@ -274,7 +262,10 @@ uint _mi_pack_key(register MI_INFO *info, uint keynr, uchar *key, uchar *old,
} }
continue; continue;
} }
memcpy((byte*) key,pos,(size_t) length); FIX_LENGTH;
memcpy((byte*) key, pos, char_length);
if (length > char_length)
bfill(key+char_length, length-char_length, ' ');
key+= length; key+= length;
k_length-=length; k_length-=length;
} }

4
mysql-test/r/binary.result
View File

@ -62,6 +62,10 @@ concat("-",a,"-",b,"-")
select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello "; select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello ";
concat("-",a,"-",b,"-") concat("-",a,"-",b,"-")
alter table t1 modify b tinytext not null, drop key b, add key (b(100)); alter table t1 modify b tinytext not null, drop key b, add key (b(100));
select concat("-",a,"-",b,"-") from t1;
concat("-",a,"-",b,"-")
-hello-hello-
-hello2-hello2-
select concat("-",a,"-",b,"-") from t1 where b="hello "; select concat("-",a,"-",b,"-") from t1 where b="hello ";
concat("-",a,"-",b,"-") concat("-",a,"-",b,"-")
-hello-hello- -hello-hello-

38
mysql-test/r/key.result
View File

@ -76,13 +76,12 @@ CCident varchar(50) DEFAULT '' NOT NULL,
PRIMARY KEY (name,author,category) PRIMARY KEY (name,author,category)
); );
INSERT INTO t1 VALUES INSERT INTO t1 VALUES
('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai\nsalut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1'); ('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai salut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1');
INSERT INTO t1 VALUES INSERT INTO t1 VALUES
('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1'); ('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1');
select * from t1 where name='patnom' and author='patauteur' and category=0; select * from t1 where name='patnom' and author='patauteur' and category=0;
name author category email password proxy bitmap msg urlscol urlhttp timeout nbcnx creation livinguntil lang type subcat subtype reg scs capacity userISP CCident name author category email password proxy bitmap msg urlscol urlhttp timeout nbcnx creation livinguntil lang type subcat subtype reg scs capacity userISP CCident
patnom patauteur 0 p.favre@cryo-networks.fr NULL NULL #p2sndnq6ae5g1u6t essai patnom patauteur 0 p.favre@cryo-networks.fr NULL NULL #p2sndnq6ae5g1u6t essai salut scol://195.242.78.119:patauteur.patnom NULL NULL NULL 950036174 -882087474 NULL 3 0 3 1 Pub/patnom/futur_divers.scs NULL pat CC1
salut scol://195.242.78.119:patauteur.patnom NULL NULL NULL 950036174 -882087474 NULL 3 0 3 1 Pub/patnom/futur_divers.scs NULL pat CC1
drop table t1; drop table t1;
create table t1 create table t1
( (
@ -235,3 +234,36 @@ SELECT numeropost FROM t1 WHERE numreponse='1';
numeropost numeropost
1 1
drop table t1; drop table t1;
create table t1 (c varchar(30) character set utf8, t text character set utf8, unique (c(2)), unique (t(3))) engine=myisam;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`c` varchar(30) character set utf8 default NULL,
`t` text character set utf8,
UNIQUE KEY `c` (`c`(2)),
UNIQUE KEY `t` (`t`(3))
) ENGINE=MyISAM DEFAULT CHARSET=latin1
insert t1 values ('cccc', 'tttt'),
(0xD0B1212223D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1212223D0B1D0B1D0B1D0B1),
(0xD0B1222123D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1222123D0B1D0B1D0B1D0B1);
insert t1 (c) values ('cc22');
ERROR 23000: Duplicate entry 'cc22' for key 1
insert t1 (t) values ('ttt22');
ERROR 23000: Duplicate entry 'ttt22' for key 2
insert t1 (c) values (0xD0B1212322D0B1D0B1D0B1D0B1D0B1);
ERROR 23000: Duplicate entry 'б!#"Ð' for key 1
insert t1 (t) values (0xD0B1D0B1212322D0B1D0B1D0B1D0B1);
ERROR 23000: Duplicate entry 'бб!#"б' for key 2
select c from t1 where c='cccc';
c
cccc
select t from t1 where t='tttt';
t
tttt
select c from t1 where c=0xD0B1212223D0B1D0B1D0B1D0B1D0B1;
c
?!"#?????
select t from t1 where t=0xD0B1D0B1212223D0B1D0B1D0B1D0B1;
t
??!"#????
drop table t1;

1
mysql-test/t/binary.test
View File

@ -38,6 +38,7 @@ select concat("-",a,"-",b,"-") from t1 where b="hello ";
select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello "; select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello ";
# blob test # blob test
alter table t1 modify b tinytext not null, drop key b, add key (b(100)); alter table t1 modify b tinytext not null, drop key b, add key (b(100));
select concat("-",a,"-",b,"-") from t1;
select concat("-",a,"-",b,"-") from t1 where b="hello "; select concat("-",a,"-",b,"-") from t1 where b="hello ";
select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello "; select concat("-",a,"-",b,"-") from t1 ignore index (b) where b="hello ";
drop table t1; drop table t1;

2
mysql-test/t/func_gconcat.test
View File

@ -215,10 +215,12 @@ DROP TABLE t1;
# check null values #1 # check null values #1
# #
--disable_warnings
CREATE TABLE t1 (a_id tinyint(4) NOT NULL default '0', PRIMARY KEY (a_id)) ENGINE=InnoDB DEFAULT CHARSET=latin1; CREATE TABLE t1 (a_id tinyint(4) NOT NULL default '0', PRIMARY KEY (a_id)) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES (1),(2),(3); INSERT INTO t1 VALUES (1),(2),(3);
CREATE TABLE t2 (b_id tinyint(4) NOT NULL default '0',b_a tinyint(4) NOT NULL default '0', PRIMARY KEY (b_id), KEY (b_a), CREATE TABLE t2 (b_id tinyint(4) NOT NULL default '0',b_a tinyint(4) NOT NULL default '0', PRIMARY KEY (b_id), KEY (b_a),
CONSTRAINT fk_b_a FOREIGN KEY (b_a) REFERENCES t1 (a_id) ON DELETE CASCADE ON UPDATE NO ACTION) ENGINE=InnoDB DEFAULT CHARSET=latin1; CONSTRAINT fk_b_a FOREIGN KEY (b_a) REFERENCES t1 (a_id) ON DELETE CASCADE ON UPDATE NO ACTION) ENGINE=InnoDB DEFAULT CHARSET=latin1;
--enable_warnings
INSERT INTO t2 VALUES (1,1),(2,1),(3,1),(4,2),(5,2); INSERT INTO t2 VALUES (1,1),(2,1),(3,1),(4,2),(5,2);
SELECT * FROM (SELECT t1.*,GROUP_CONCAT(t2.b_id SEPARATOR ',') as b_list FROM (t1 LEFT JOIN (t2) on t1.a_id = t2.b_a) GROUP BY t1.a_id ) AS xyz; SELECT * FROM (SELECT t1.*,GROUP_CONCAT(t2.b_id SEPARATOR ',') as b_list FROM (t1 LEFT JOIN (t2) on t1.a_id = t2.b_a) GROUP BY t1.a_id ) AS xyz;
DROP TABLE t2; DROP TABLE t2;

26
mysql-test/t/key.test
View File

@ -97,7 +97,7 @@ CREATE TABLE t1 (
PRIMARY KEY (name,author,category) PRIMARY KEY (name,author,category)
); );
INSERT INTO t1 VALUES INSERT INTO t1 VALUES
('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai\nsalut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1'); ('patnom','patauteur',0,'p.favre@cryo-networks.fr',NULL,NULL,'#p2sndnq6ae5g1u6t','essai salut','scol://195.242.78.119:patauteur.patnom',NULL,NULL,NULL,950036174,-882087474,NULL,3,0,3,'1','Pub/patnom/futur_divers.scs',NULL,'pat','CC1');
INSERT INTO t1 VALUES INSERT INTO t1 VALUES
('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1'); ('LeNomDeMonSite','Marc',0,'m.barilley@cryo-networks.fr',NULL,NULL,NULL,NULL,'scol://195.242.78.119:Marc.LeNomDeMonSite',NULL,NULL,NULL,950560434,-881563214,NULL,3,0,3,'1','Pub/LeNomDeMonSite/domus_hibere.scs',NULL,'Marq','CC1');
select * from t1 where name='patnom' and author='patauteur' and category=0; select * from t1 where name='patnom' and author='patauteur' and category=0;
@ -228,3 +228,27 @@ EXPLAIN SELECT numeropost FROM t1 WHERE numreponse='1';
FLUSH TABLES; FLUSH TABLES;
SELECT numeropost FROM t1 WHERE numreponse='1'; SELECT numeropost FROM t1 WHERE numreponse='1';
drop table t1; drop table t1;
#
# UNIQUE prefix keys and multi-byte charsets
#
create table t1 (c varchar(30) character set utf8, t text character set utf8, unique (c(2)), unique (t(3))) engine=myisam;
show create table t1;
insert t1 values ('cccc', 'tttt'),
(0xD0B1212223D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1212223D0B1D0B1D0B1D0B1),
(0xD0B1222123D0B1D0B1D0B1D0B1D0B1, 0xD0B1D0B1222123D0B1D0B1D0B1D0B1);
--error 1062
insert t1 (c) values ('cc22');
--error 1062
insert t1 (t) values ('ttt22');
--error 1062
insert t1 (c) values (0xD0B1212322D0B1D0B1D0B1D0B1D0B1);
--error 1062
insert t1 (t) values (0xD0B1D0B1212322D0B1D0B1D0B1D0B1);
select c from t1 where c='cccc';
select t from t1 where t='tttt';
select c from t1 where c=0xD0B1212223D0B1D0B1D0B1D0B1D0B1;
select t from t1 where t=0xD0B1D0B1212223D0B1D0B1D0B1D0B1;
drop table t1;