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Bug #7878 with utf_general_ci, equals (=) has problem with accent insensitivity

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Backporting Monty's fix for 5.0 into 4.1.
This commit is contained in:
unknown 2005-02-18 16:10:12 +04:00
parent 5b91c5a73c
commit cfa78c2645
4 changed files with 35 additions and 2 deletions
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1
include/my_base.h
View file

@ -340,6 +340,7 @@ enum ha_base_keytype {
#define HA_STATE_BUFF_SAVED 512 /* If current keybuff is info->buff */
#define HA_STATE_ROW_CHANGED 1024 /* To invalide ROW cache */
#define HA_STATE_EXTEND_BLOCK 2048
#define HA_STATE_RNEXT_SAME 4096 /* rnext_same was called */
enum en_fieldtype {
FIELD_LAST=-1,FIELD_NORMAL,FIELD_SKIP_ENDSPACE,FIELD_SKIP_PRESPACE,

8
myisam/mi_rnext_same.c
View file

@ -57,7 +57,11 @@ int mi_rnext_same(MI_INFO *info, byte *buf)
#endif
case HA_KEY_ALG_BTREE:
default:
memcpy(info->lastkey2,info->lastkey,info->last_rkey_length);
if (!(info->update & HA_STATE_RNEXT_SAME))
{
/* First rnext_same; Store old key */
memcpy(info->lastkey2,info->lastkey,info->last_rkey_length);
}
for (;;)
{
if ((error=_mi_search_next(info,keyinfo,info->lastkey,
@ -81,7 +85,7 @@ int mi_rnext_same(MI_INFO *info, byte *buf)
rw_unlock(&info->s->key_root_lock[inx]);
/* Don't clear if database-changed */
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
info->update|= HA_STATE_NEXT_FOUND;
info->update|= HA_STATE_NEXT_FOUND | HA_STATE_RNEXT_SAME;
if (error)
{

12
mysql-test/r/ctype_latin1_de.result
View file

@ -326,3 +326,15 @@ latin1_german2_ci 6109
latin1_german2_ci 61
latin1_german2_ci 6120
drop table t1;
SET NAMES latin1;
CREATE TABLE t1 (
col1 varchar(255) NOT NULL default ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1 collate latin1_german2_ci;
INSERT INTO t1 VALUES ('ß'),('ss'),('ss');
ALTER TABLE t1 ADD KEY ifword(col1);
SELECT * FROM t1 WHERE col1='ß' ORDER BY col1, BINARY col1;
col1
ss
ss
ß
DROP TABLE t1;

16
mysql-test/t/ctype_latin1_de.test
View file

@ -116,3 +116,19 @@ SELECT FIELD('ue',s1), FIELD('
DROP TABLE t1;
-- source include/ctype_filesort.inc
#
# Bug#7878 with utf8_general_ci, equals (=) has problem with
# accent insensitivity.
# Although originally this problem was found with UTF8 character set,
# '=' behaved wrong for latin1_german2_ci as well.
# Let's check it does not work incorrect anymore.
#
SET NAMES latin1;
CREATE TABLE t1 (
col1 varchar(255) NOT NULL default ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1 collate latin1_german2_ci;
INSERT INTO t1 VALUES ('ß'),('ss'),('ss');
ALTER TABLE t1 ADD KEY ifword(col1);
SELECT * FROM t1 WHERE col1='ß' ORDER BY col1, BINARY col1;
DROP TABLE t1;