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MDEV-17064 LIKE function has error behavior on the fields in which the collation is xxx_unicode_xx

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Synchronizing sources in:
- my_wildcmp_uca_impl() handling utf8_unicode_ci
- my_wildcmp_unicode_impl() handling utf8_general_ci

The latter has already had a fix for a similar MySQL bug in utf8_general_ci:
Bug#11754 SET NAMES utf8 followed by SELECT "A\\" LIKE "A\\" returns 0
So fix is now propagated to utf8_unicode_ci.
This commit is contained in:
Alexander Barkov 2018-10-15 13:22:18 +04:00
parent ae3fe14c17
commit 34f8a4071e
4 changed files with 119 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
mysql-test/r/ctype_uca.result
View File

@ -13571,5 +13571,26 @@ Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 'oe') and (`test`.`t1`.`a` = 'oe'))
DROP TABLE t1;
#
# MDEV-17064 LIKE function has error behavior on the fields in which the collation is xxx_unicode_xx
#
CREATE TABLE t1 (name VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci);
INSERT INTO t1 VALUES ('radio! test');
SELECT * FROM t1 WHERE name LIKE '%!!%' ESCAPE '!';
name
radio! test
ALTER TABLE t1 CHANGE COLUMN name name VARCHAR(20) CHARACTER SET 'utf8' COLLATE 'utf8_general_ci';
SELECT * FROM t1 WHERE name LIKE '%!!%' ESCAPE '!';
name
radio! test
DROP TABLE t1;
CREATE TABLE t1 (name VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci);
INSERT INTO t1 VALUES ('radio! test');
SELECT name LIKE '%!!%' ESCAPE '!' AS c1,
name LIKE '%!!%' COLLATE utf8_general_ci ESCAPE '!' AS c2
FROM t1;
c1 c2
1 1
DROP TABLE t1;
#
# End of MariaDB-10.0 tests
#

18
mysql-test/t/ctype_uca.test
View File

@ -617,6 +617,24 @@ EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='oe' AND a='oe' COLLATE utf8_german2_c
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='oe' COLLATE utf8_german2_ci AND a='oe';
DROP TABLE t1;
--echo #
--echo # MDEV-17064 LIKE function has error behavior on the fields in which the collation is xxx_unicode_xx
--echo #
CREATE TABLE t1 (name VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci);
INSERT INTO t1 VALUES ('radio! test');
SELECT * FROM t1 WHERE name LIKE '%!!%' ESCAPE '!';
ALTER TABLE t1 CHANGE COLUMN name name VARCHAR(20) CHARACTER SET 'utf8' COLLATE 'utf8_general_ci';
SELECT * FROM t1 WHERE name LIKE '%!!%' ESCAPE '!';
DROP TABLE t1;
CREATE TABLE t1 (name VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci);
INSERT INTO t1 VALUES ('radio! test');
SELECT name LIKE '%!!%' ESCAPE '!' AS c1,
name LIKE '%!!%' COLLATE utf8_general_ci ESCAPE '!' AS c2
FROM t1;
DROP TABLE t1;
--echo #
--echo # End of MariaDB-10.0 tests
--echo #

20
strings/ctype-uca.c
View File

@ -21092,7 +21092,7 @@ int my_wildcmp_uca_impl(CHARSET_INFO *cs,
}
wildstr+= scan;
if (w_wc == (my_wc_t)escape)
if (w_wc == (my_wc_t) escape && wildstr < wildend)
{
if ((scan= mb_wc(cs, &w_wc, (const uchar*)wildstr,
(const uchar*)wildend)) <= 0)
@ -21113,16 +21113,14 @@ int my_wildcmp_uca_impl(CHARSET_INFO *cs,
else
{
if (my_uca_charcmp(cs,s_wc,w_wc))
return 1;
return 1; /* No match */
}
if (wildstr == wildend)
return (str != str_end); /* Match if both are at end */
}
if (w_wc == (my_wc_t) w_many)
{ /* Found w_many */
/* Remove any '%' and '_' from the wild search string */
for ( ; wildstr != wildend ; )
{
@ -21157,13 +21155,17 @@ int my_wildcmp_uca_impl(CHARSET_INFO *cs,
if ((scan= mb_wc(cs, &w_wc, (const uchar*)wildstr,
(const uchar*)wildend)) <= 0)
return 1;
wildstr+= scan;
if (w_wc == (my_wc_t) escape)
{
wildstr+= scan;
if (wildstr < wildend)
{
if ((scan= mb_wc(cs, &w_wc, (const uchar*)wildstr,
(const uchar*)wildend)) <= 0)
return 1;
wildstr+= scan;
}
}
while (1)
@ -21182,19 +21184,19 @@ int my_wildcmp_uca_impl(CHARSET_INFO *cs,
if (str == str_end)
return -1;
str+= scan;
result= my_wildcmp_uca_impl(cs, str, str_end, wildstr, wildend,
escape, w_one, w_many, recurse_level+1);
escape, w_one, w_many,
recurse_level + 1);
if (result <= 0)
return result;
str+= scan;
}
}
}
return (str != str_end ? 1 : 0);
}
int my_wildcmp_uca(CHARSET_INFO *cs,
const char *str,const char *str_end,
const char *wildstr,const char *wildend,

6
strings/ctype-utf8.c
View File

@ -4400,9 +4400,7 @@ int my_wildcmp_unicode_impl(CHARSET_INFO *cs,
int result= -1; /* Not found, using wildcards */
my_wc_t s_wc, w_wc;
int scan;
int (*mb_wc)(CHARSET_INFO *, my_wc_t *,
const uchar *, const uchar *);
mb_wc= cs->cset->mb_wc;
my_charset_conv_mb_wc mb_wc= cs->cset->mb_wc;
if (my_string_stack_guard && my_string_stack_guard(recurse_level))
return 1;
@ -4454,10 +4452,8 @@ int my_wildcmp_unicode_impl(CHARSET_INFO *cs,
return (str != str_end); /* Match if both are at end */
}
if (w_wc == (my_wc_t) w_many)
{ /* Found w_many */
/* Remove any '%' and '_' from the wild search string */
for ( ; wildstr != wildend ; )
{