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Bug#31384 DATE_ADD() and DATE_SUB() return binary data

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Problem: DATE_ADD() is a hybrid function and can return
DATE, DATETIME or VARCHAR data type depending on arguments.

In case of VARCHAR data type, DATE_ADD() reported "binary" character set,
which was wrong.

Fix: make DATE_ADD() return @character_set_connection in VARCHAR context.
 @ mysql-test/include/ctype_numconv.inc
   Adding tests
 @ mysql-test/r/ctype_binary.result
   Adding tests
 @ mysql-test/r/ctype_cp1251.result
   Adding tests
 @ mysql-test/r/ctype_latin1.result
   Adding tests
 @ mysql-test/r/ctype_ucs.result
   Adding tests
 @ mysql-test/r/ctype_utf8.result
   Adding tests
 @ sql/item_strfunc.cc
  - Moving code from Item_str_ascii_func::val_str() to
  Item_str_func::val_str_from_val_str_ascii(), as
  this code needs to be shared by Item_date_add_interval.
  - Adding str2 parameter to be used as a buffer, instead of
   using private ascii_buf member.
 @ sql/item_strfunc.h
  - Moving code from Item_str_ascii_func::val_str() to
  Item_str_func::val_str_from_val_str_ascii()
  - Removing "String *val_str_convert_from_ascii(String *str, String *ascii_buf)"
    prototype as it was neither used nor declared.
 @ sql/item_timefunc.h
  - Overwriting parent's charset_for_protocol() method,
    becase we need to behave differenlty in VARCHAR and DATE/DATETYPE context.
  - Adding ascii_buf for conversion.
  - Adding val_str_ascii() prototype.
  - Adding val_str() which uses newly added
    Item_str_func::val_str_from_val_str_ascii(),
    passing ascii_buf as a conversion buffer.
This commit is contained in:
Alexander Barkov
2011-02-10 11:18:08 +03:00
parent 6f7e87cef0
commit 7d88b552e2
10 changed files with 272 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
mysql-test/include/ctype_numconv.inc
View File

@ -1737,6 +1737,32 @@ EXPLAIN SELECT * FROM t1 WHERE date_column BETWEEN '2010-09-01' AND '2010-10-01'
DROP TABLE t1;
--echo #
--echo # Bug #31384 DATE_ADD() and DATE_SUB() return binary data
--echo #
SELECT @@collation_connection, @@character_set_results;
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
DROP TABLE t1;
--enable_metadata
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
--disable_metadata
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
--echo #
--echo # Bug#52159 returning time type from function and empty left join causes debug assertion
--echo #

40
mysql-test/r/ctype_binary.result
View File

@ -2767,6 +2767,46 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range date_column date_column 9 NULL 1 Using where
DROP TABLE t1;
#
# Bug #31384 DATE_ADD() and DATE_SUB() return binary data
#
SELECT @@collation_connection, @@character_set_results;
@@collation_connection @@character_set_results
binary binary
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`field_str1` varbinary(29) DEFAULT NULL,
`field1_str2` varbinary(29) DEFAULT NULL,
`field_date` date DEFAULT NULL,
`field_datetime` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def field_str1 254 29 10 Y 128 31 63
def field1_str2 254 29 19 Y 128 31 63
def field_date 10 29 10 Y 128 31 63
def field_datetime 12 29 19 Y 128 31 63
field_str1 field1_str2 field_date field_datetime
2007-08-02 2007-08-03 17:32:00 2007-08-02 2007-08-03 17:32:00
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
field_str1 field1_str2 field_date field_datetime
323030372D30382D30322032333A35393A3030 323030372D30382D30332031373A33323A3030 323030372D30382D3032 323030372D30382D30332031373A33323A3030
#
# Bug#52159 returning time type from function and empty left join causes debug assertion
#
CREATE FUNCTION f1() RETURNS TIME RETURN 1;

40
mysql-test/r/ctype_cp1251.result
View File

@ -3157,6 +3157,46 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range date_column date_column 9 NULL 1 Using where
DROP TABLE t1;
#
# Bug #31384 DATE_ADD() and DATE_SUB() return binary data
#
SELECT @@collation_connection, @@character_set_results;
@@collation_connection @@character_set_results
cp1251_general_ci cp1251
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`field_str1` varchar(29) CHARACTER SET cp1251 DEFAULT NULL,
`field1_str2` varchar(29) CHARACTER SET cp1251 DEFAULT NULL,
`field_date` date DEFAULT NULL,
`field_datetime` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def field_str1 254 29 10 Y 0 31 51
def field1_str2 254 29 19 Y 0 31 51
def field_date 10 29 10 Y 128 31 63
def field_datetime 12 29 19 Y 128 31 63
field_str1 field1_str2 field_date field_datetime
2007-08-02 2007-08-03 17:32:00 2007-08-02 2007-08-03 17:32:00
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
field_str1 field1_str2 field_date field_datetime
323030372D30382D30322032333A35393A3030 323030372D30382D30332031373A33323A3030 323030372D30382D3032 323030372D30382D30332031373A33323A3030
#
# Bug#52159 returning time type from function and empty left join causes debug assertion
#
CREATE FUNCTION f1() RETURNS TIME RETURN 1;

40
mysql-test/r/ctype_latin1.result
View File

@ -3186,6 +3186,46 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range date_column date_column 9 NULL 1 Using where
DROP TABLE t1;
#
# Bug #31384 DATE_ADD() and DATE_SUB() return binary data
#
SELECT @@collation_connection, @@character_set_results;
@@collation_connection @@character_set_results
latin1_swedish_ci latin1
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`field_str1` varchar(29) DEFAULT NULL,
`field1_str2` varchar(29) DEFAULT NULL,
`field_date` date DEFAULT NULL,
`field_datetime` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def field_str1 254 29 10 Y 0 31 8
def field1_str2 254 29 19 Y 0 31 8
def field_date 10 29 10 Y 128 31 63
def field_datetime 12 29 19 Y 128 31 63
field_str1 field1_str2 field_date field_datetime
2007-08-02 2007-08-03 17:32:00 2007-08-02 2007-08-03 17:32:00
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
field_str1 field1_str2 field_date field_datetime
323030372D30382D30322032333A35393A3030 323030372D30382D30332031373A33323A3030 323030372D30382D3032 323030372D30382D30332031373A33323A3030
#
# Bug#52159 returning time type from function and empty left join causes debug assertion
#
CREATE FUNCTION f1() RETURNS TIME RETURN 1;

40
mysql-test/r/ctype_ucs.result
View File

@ -4009,6 +4009,46 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
DROP TABLE t1;
#
# Bug #31384 DATE_ADD() and DATE_SUB() return binary data
#
SELECT @@collation_connection, @@character_set_results;
@@collation_connection @@character_set_results
ucs2_general_ci latin1
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`field_str1` varchar(29) CHARACTER SET ucs2 DEFAULT NULL,
`field1_str2` varchar(29) CHARACTER SET ucs2 DEFAULT NULL,
`field_date` date DEFAULT NULL,
`field_datetime` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def field_str1 254 29 10 Y 0 31 8
def field1_str2 254 29 19 Y 0 31 8
def field_date 10 29 10 Y 128 31 63
def field_datetime 12 29 19 Y 128 31 63
field_str1 field1_str2 field_date field_datetime
2007-08-02 2007-08-03 17:32:00 2007-08-02 2007-08-03 17:32:00
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
field_str1 field1_str2 field_date field_datetime
0032003000300037002D00300038002D00300032002000320033003A00350039003A00300030 0032003000300037002D00300038002D00300033002000310037003A00330032003A00300030 323030372D30382D3032 323030372D30382D30332031373A33323A3030
#
# Bug#52159 returning time type from function and empty left join causes debug assertion
#
CREATE FUNCTION f1() RETURNS TIME RETURN 1;

40
mysql-test/r/ctype_utf8.result
View File

@ -4898,6 +4898,46 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range date_column date_column 9 NULL 1 Using where
DROP TABLE t1;
#
# Bug #31384 DATE_ADD() and DATE_SUB() return binary data
#
SELECT @@collation_connection, @@character_set_results;
@@collation_connection @@character_set_results
utf8_general_ci utf8
CREATE TABLE t1 AS
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 MINUTE) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`field_str1` varchar(29) CHARACTER SET utf8 DEFAULT NULL,
`field1_str2` varchar(29) CHARACTER SET utf8 DEFAULT NULL,
`field_date` date DEFAULT NULL,
`field_datetime` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT
DATE_SUB('2007-08-03', INTERVAL 1 DAY) AS field_str1,
DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE) AS field1_str2,
DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY) AS field_date,
DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE) AS field_datetime;
Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
def field_str1 254 87 10 Y 0 31 33
def field1_str2 254 87 19 Y 0 31 33
def field_date 10 29 10 Y 128 31 63
def field_datetime 12 29 19 Y 128 31 63
field_str1 field1_str2 field_date field_datetime
2007-08-02 2007-08-03 17:32:00 2007-08-02 2007-08-03 17:32:00
SELECT
HEX(DATE_SUB('2007-08-03', INTERVAL 1 MINUTE)) AS field_str1,
HEX(DATE_SUB('2007-08-03 17:33:00', INTERVAL 1 MINUTE)) AS field1_str2,
HEX(DATE_SUB(DATE('2007-08-03'), INTERVAL 1 DAY)) AS field_date,
HEX(DATE_SUB(CAST('2007-08-03 17:33:00' AS DATETIME), INTERVAL 1 MINUTE)) AS field_datetime;
field_str1 field1_str2 field_date field_datetime
323030372D30382D30322032333A35393A3030 323030372D30382D30332031373A33323A3030 323030372D30382D3032 323030372D30382D30332031373A33323A3030
#
# Bug#52159 returning time type from function and empty left join causes debug assertion
#
CREATE FUNCTION f1() RETURNS TIME RETURN 1;

14
sql/item_strfunc.cc
View File

@ -70,7 +70,7 @@ String my_empty_string("",default_charset_info);
Normally conversion does not happen, and val_str_ascii() is immediately
returned instead.
*/
String *Item_str_ascii_func::val_str(String *str)
String *Item_str_func::val_str_from_val_str_ascii(String *str, String *str2)
{
DBUG_ASSERT(fixed == 1);
@ -82,19 +82,19 @@ String *Item_str_ascii_func::val_str(String *str)
return res;
}
DBUG_ASSERT(str != &ascii_buf);
DBUG_ASSERT(str != str2);
uint errors;
String *res= val_str_ascii(&ascii_buf);
String *res= val_str_ascii(str);
if (!res)
return 0;
if ((null_value= str->copy(res->ptr(), res->length(),
&my_charset_latin1, collation.collation,
&errors)))
if ((null_value= str2->copy(res->ptr(), res->length(),
&my_charset_latin1, collation.collation,
&errors)))
return 0;
return str;
return str2;
}

7
sql/item_strfunc.h
View File

@ -51,6 +51,7 @@ public:
enum Item_result result_type () const { return STRING_RESULT; }
void left_right_max_length();
bool fix_fields(THD *thd, Item **ref);
String *val_str_from_val_str_ascii(String *str, String *str2);
};
@ -66,8 +67,10 @@ public:
Item_str_ascii_func(Item *a) :Item_str_func(a) {}
Item_str_ascii_func(Item *a,Item *b) :Item_str_func(a,b) {}
Item_str_ascii_func(Item *a,Item *b,Item *c) :Item_str_func(a,b,c) {}
String *val_str_convert_from_ascii(String *str, String *ascii_buf);
String *val_str(String *str);
String *val_str(String *str)
{
return val_str_from_val_str_ascii(str, &ascii_buf);
}
virtual String *val_str_ascii(String *)= 0;
};

19
sql/item_timefunc.cc
View File

@ -2205,8 +2205,6 @@ void Item_date_add_interval::fix_length_and_dec()
enum_field_types arg0_field_type;
maybe_null=1;
fix_length_and_charset_datetime(MAX_DATETIME_FULL_WIDTH);
value.alloc(max_length);
/*
The field type for the result of an Item_date function is defined as
@ -2231,6 +2229,21 @@ void Item_date_add_interval::fix_length_and_dec()
else
cached_field_type= MYSQL_TYPE_DATETIME;
}
if (cached_field_type == MYSQL_TYPE_STRING)
{
/* Behave as a usual string function when return type is VARCHAR. */
fix_length_and_charset(MAX_DATETIME_FULL_WIDTH, default_charset());
}
else
{
/*
Follow the "Number-to-string conversion" rules as in WorkLog 2649
when return type is DATE or DATETIME.
*/
fix_length_and_charset_datetime(MAX_DATETIME_FULL_WIDTH);
}
value.alloc(max_length);
}
@ -2253,7 +2266,7 @@ bool Item_date_add_interval::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
}
String *Item_date_add_interval::val_str(String *str)
String *Item_date_add_interval::val_str_ascii(String *str)
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;

20
sql/item_timefunc.h
View File

@ -773,16 +773,32 @@ class Item_date_add_interval :public Item_date_func
{
String value;
enum_field_types cached_field_type;
String ascii_buf;
public:
const interval_type int_type; // keep it public
const bool date_sub_interval; // keep it public
Item_date_add_interval(Item *a,Item *b,interval_type type_arg,bool neg_arg)
:Item_date_func(a,b),int_type(type_arg), date_sub_interval(neg_arg) {}
String *val_str(String *);
String *val_str_ascii(String *str);
String *val_str(String *str)
{
return val_str_from_val_str_ascii(str, &ascii_buf);
}
const char *func_name() const { return "date_add_interval"; }
void fix_length_and_dec();
enum_field_types field_type() const { return cached_field_type; }
CHARSET_INFO *charset_for_protocol(void) const
{
/*
DATE_ADD() can return DATE, DATETIME or VARCHAR depending on arguments.
Send using "binary" when DATE or DATETIME,
or using collation.collation when VARCHAR
(which was fixed from @collation_connection in fix_length_and_dec).
*/
DBUG_ASSERT(fixed == 1);
return cached_field_type == MYSQL_TYPE_STRING ?
collation.collation : &my_charset_bin;
}
longlong val_int();
bool get_date(MYSQL_TIME *res, uint fuzzy_date);
bool eq(const Item *item, bool binary_cmp) const;