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Add 5.0 part of fix for bug 17047.

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kroki/tomash@moonlight.intranet 2006-11-16 14:06:51 +03:00
parent 23efecdb3c
commit 9e7f682116
4 changed files with 44 additions and 3 deletions
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13
mysql-test/r/func_str.result
View file

@ -1148,4 +1148,17 @@ id select_type table type possible_keys key key_len ref rows Extra
Warnings:
Note 1003 select `test`.`t1`.`code` AS `code`,`test`.`t2`.`id` AS `id` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`code` = _latin1'a12') and (length(`test`.`t1`.`code`) = 5))
DROP TABLE t1,t2;
SET @orig_sql_mode = @@SQL_MODE;
SET SQL_MODE=traditional;
SELECT CHAR(0xff,0x8f USING utf8);
CHAR(0xff,0x8f USING utf8)
NULL
Warnings:
Error 1300 Invalid utf8 character string: 'FF8F'
SELECT CHAR(0xff,0x8f USING utf8) IS NULL;
CHAR(0xff,0x8f USING utf8) IS NULL
1
Warnings:
Error 1300 Invalid utf8 character string: 'FF8F'
SET SQL_MODE=@orig_sql_mode;
End of 5.0 tests

14
mysql-test/t/func_str.test
View file

@ -780,4 +780,18 @@ SELECT * FROM t1 INNER JOIN t2 ON code=id
DROP TABLE t1,t2;
#
# BUG#17047: CHAR() and IN() can return NULL without signaling NULL
# result
#
SET @orig_sql_mode = @@SQL_MODE;
SET SQL_MODE=traditional;
SELECT CHAR(0xff,0x8f USING utf8);
SELECT CHAR(0xff,0x8f USING utf8) IS NULL;
SET SQL_MODE=@orig_sql_mode;
--echo End of 5.0 tests

14
sql/item_strfunc.cc
View file

@ -80,6 +80,20 @@ String *Item_str_func::check_well_formed_result(String *str)
}
bool Item_str_func::fix_fields(THD *thd, Item **ref)
{
bool res= Item_func::fix_fields(thd, ref);
/*
In Item_str_func::check_well_formed_result() we may set null_value
flag on the same condition as in test() below.
*/
maybe_null= (maybe_null ||
test(thd->variables.sql_mode &
(MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)));
return res;
}
my_decimal *Item_str_func::val_decimal(my_decimal *decimal_value)
{
DBUG_ASSERT(fixed == 1);

6
sql/item_strfunc.h
View file

@ -37,6 +37,7 @@ public:
enum Item_result result_type () const { return STRING_RESULT; }
void left_right_max_length();
String *check_well_formed_result(String *str);
bool fix_fields(THD *thd, Item **ref);
};
class Item_func_md5 :public Item_str_func
@ -525,9 +526,8 @@ public:
{ collation.set(cs); }
String *val_str(String *);
void fix_length_and_dec()
{
maybe_null=0;
max_length=arg_count * collation.collation->mbmaxlen;
{
max_length= arg_count * collation.collation->mbmaxlen;
}
const char *func_name() const { return "char"; }
};