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Fix for bug#6317: string function CHAR, parameter is NULL, wrong result

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This commit is contained in:
gluh@gluh.mysql.r18.ru 2005-02-23 18:15:45 +03:00
parent 4996daec19
commit 2b5ee94a33
3 changed files with 14 additions and 0 deletions
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6
mysql-test/r/func_str.result
View File

@ -733,3 +733,9 @@ WHERE a = CONV('e251273eb74a8ee3', 16, 10);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
DROP TABLE t1;
SELECT CHAR(NULL,121,83,81,'76') as my_column;
my_column
ySQL
SELECT CHAR_LENGTH(CHAR(NULL,121,83,81,'76')) as my_column;
my_column
4

6
mysql-test/t/func_str.test
View File

@ -476,3 +476,9 @@ EXPLAIN
WHERE a = CONV('e251273eb74a8ee3', 16, 10);
DROP TABLE t1;
#
# Bug #6317: string function CHAR, parameter is NULL, wrong result
#
SELECT CHAR(NULL,121,83,81,'76') as my_column;
SELECT CHAR_LENGTH(CHAR(NULL,121,83,81,'76')) as my_column;

2
sql/item_strfunc.cc
View File

@ -1868,6 +1868,7 @@ String *Item_func_char::val_str(String *str)
{
int32 num=(int32) args[i]->val_int();
if (!args[i]->null_value)
{
#ifdef USE_MB
if (use_mb(collation.collation))
{
@ -1883,6 +1884,7 @@ b1: str->append((char)(num>>8));
}
#endif
str->append((char)num);
}
}
str->set_charset(collation.collation);
str->realloc(str->length()); // Add end 0 (for Purify)