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MDEV-5969 Crash in prepared statement with NO_ZERO_IN_DATE and ROLLUP

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MDEV-5971 Asymmetry between CAST(DATE'2001-00-00') to INT and TO CHAR in prepared statements

Consistently set maybe_null flag, even not-NULL temporal literal may become NULL
in the restrictive sql_mode.
This commit is contained in:
Sergei Golubchik 2014-03-29 11:33:20 +01:00
parent b37157e49e
commit 73f4861575
4 changed files with 261 additions and 6 deletions
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141
mysql-test/r/temporal_literal.result
View File

@ -472,3 +472,144 @@ a
10:20:30.123456
10:20:30.123456
DROP TABLE t1;
#
# MDEV-5969 Crash in prepared statement with NO_ZERO_IN_DATE and ROLLUP
#
CREATE TABLE t1
(
year INT NOT NULL,
product VARCHAR(32) NOT NULL,
profit INT
);
INSERT INTO t1 VALUES ('2001','car',101);
INSERT INTO t1 VALUES ('2001','gas',102);
INSERT INTO t1 VALUES ('2001','toy',103);
INSERT INTO t1 VALUES ('2002','car',201);
INSERT INTO t1 VALUES ('2002','gas',202);
INSERT INTO t1 VALUES ('2002','toy',203);
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT DATE'2001-00-00' AS c,year, SUM(profit) FROM t1 GROUP BY c,year WITH ROLLUP";
EXECUTE stmt;
c year SUM(profit)
2001-00-00 2001 306
2001-00-00 2002 606
2001-00-00 NULL 912
NULL NULL 912
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
c year SUM(profit)
NULL 2001 306
NULL 2002 606
NULL NULL 912
NULL NULL 912
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
Warning 1292 Incorrect datetime value: '2001-00-00'
SET sql_mode=DEFAULT;
DROP TABLE t1;
#
# MDEV-5971 Asymmetry between CAST(DATE'2001-00-00') to INT and TO CHAR in prepared statements
#
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS SIGNED) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
c
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS CHAR) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
c
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS DECIMAL(30,0)) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
c
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS DOUBLE) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
c
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
#
# Zero month or zero day automatically mean NULL flag, no matter SQL_MODE is.
# Only zero year is OK for NOT NULL.
#
SET sql_mode=DEFAULT;
PREPARE stmt FROM "CREATE TABLE t1 AS SELECT CAST(DATE'2001-00-00' AS CHAR) AS c";
EXECUTE stmt;
SHOW COLUMNS FROM t1;
Field Type Null Key Default Extra
c varchar(10) YES NULL
SELECT * FROM t1;
c
2001-00-00
DROP TABLE t1;
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
Warnings:
Warning 1292 Incorrect datetime value: '2001-00-00'
SHOW COLUMNS FROM t1;
Field Type Null Key Default Extra
c varchar(10) YES NULL
SELECT * FROM t1;
c
NULL
DROP TABLE t1;
SET sql_mode=DEFAULT;
CREATE TABLE t1 AS SELECT
DATE'2001-01-01',
DATE'0000-01-01',
DATE'2001-00-00',
DATE'2001-00-01',
DATE'2001-01-00';
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`DATE'2001-01-01'` date NOT NULL DEFAULT '0000-00-00',
`DATE'0000-01-01'` date NOT NULL DEFAULT '0000-00-00',
`DATE'2001-00-00'` date DEFAULT NULL,
`DATE'2001-00-01'` date DEFAULT NULL,
`DATE'2001-01-00'` date DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
CREATE TABLE t1 AS SELECT
TIMESTAMP'2001-01-01 00:00:00',
TIMESTAMP'0000-01-01 00:00:00',
TIMESTAMP'2001-00-00 00:00:00',
TIMESTAMP'2001-00-01 00:00:00',
TIMESTAMP'2001-01-00 00:00:00';
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`TIMESTAMP'2001-01-01 00:00:00'` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`TIMESTAMP'0000-01-01 00:00:00'` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`TIMESTAMP'2001-00-00 00:00:00'` datetime DEFAULT NULL,
`TIMESTAMP'2001-00-01 00:00:00'` datetime DEFAULT NULL,
`TIMESTAMP'2001-01-00 00:00:00'` datetime DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;

79
mysql-test/t/temporal_literal.test
View File

@ -247,3 +247,82 @@ INSERT INTO t1 VALUES (TIME'10:20:30.1234567');
INSERT INTO t1 VALUES (TIME('10:20:30.1234567'));
SELECT * FROM t1;
DROP TABLE t1;
--echo #
--echo # MDEV-5969 Crash in prepared statement with NO_ZERO_IN_DATE and ROLLUP
--echo #
CREATE TABLE t1
(
year INT NOT NULL,
product VARCHAR(32) NOT NULL,
profit INT
);
INSERT INTO t1 VALUES ('2001','car',101);
INSERT INTO t1 VALUES ('2001','gas',102);
INSERT INTO t1 VALUES ('2001','toy',103);
INSERT INTO t1 VALUES ('2002','car',201);
INSERT INTO t1 VALUES ('2002','gas',202);
INSERT INTO t1 VALUES ('2002','toy',203);
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT DATE'2001-00-00' AS c,year, SUM(profit) FROM t1 GROUP BY c,year WITH ROLLUP";
EXECUTE stmt;
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
SET sql_mode=DEFAULT;
DROP TABLE t1;
--echo #
--echo # MDEV-5971 Asymmetry between CAST(DATE'2001-00-00') to INT and TO CHAR in prepared statements
--echo #
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS SIGNED) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS CHAR) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS DECIMAL(30,0)) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
SET sql_mode=DEFAULT;
PREPARE stmt FROM "SELECT CAST(DATE'2001-00-00' AS DOUBLE) AS c";
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
--echo #
--echo # Zero month or zero day automatically mean NULL flag, no matter SQL_MODE is.
--echo # Only zero year is OK for NOT NULL.
--echo #
SET sql_mode=DEFAULT;
PREPARE stmt FROM "CREATE TABLE t1 AS SELECT CAST(DATE'2001-00-00' AS CHAR) AS c";
EXECUTE stmt;
SHOW COLUMNS FROM t1;
SELECT * FROM t1;
DROP TABLE t1;
SET sql_mode='no_zero_in_date';
EXECUTE stmt;
SHOW COLUMNS FROM t1;
SELECT * FROM t1;
DROP TABLE t1;
SET sql_mode=DEFAULT;
CREATE TABLE t1 AS SELECT
DATE'2001-01-01',
DATE'0000-01-01',
DATE'2001-00-00',
DATE'2001-00-01',
DATE'2001-01-00';
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT
TIMESTAMP'2001-01-01 00:00:00',
TIMESTAMP'0000-01-01 00:00:00',
TIMESTAMP'2001-00-00 00:00:00',
TIMESTAMP'2001-00-01 00:00:00',
TIMESTAMP'2001-01-00 00:00:00';
SHOW CREATE TABLE t1;
DROP TABLE t1;

29
sql/item.cc
View File

@ -341,12 +341,29 @@ String *Item::val_string_from_decimal(String *str)
}
/*
All val_xxx_from_date() must call this method, to expose consistent behaviour
regarding SQL_MODE when converting DATE/DATETIME to other data types.
*/
bool Item::get_temporal_with_sql_mode(MYSQL_TIME *ltime)
{
return get_date(ltime, field_type() == MYSQL_TYPE_TIME
? TIME_TIME_ONLY
: sql_mode_for_dates(current_thd));
}
bool Item::is_null_from_temporal()
{
MYSQL_TIME ltime;
return get_temporal_with_sql_mode(&ltime);
}
String *Item::val_string_from_date(String *str)
{
MYSQL_TIME ltime;
if (get_date(&ltime, field_type() == MYSQL_TYPE_TIME
? TIME_TIME_ONLY
: sql_mode_for_dates(current_thd)) ||
if (get_temporal_with_sql_mode(&ltime) ||
str->alloc(MAX_DATE_STRING_REP_LENGTH))
{
null_value= 1;
@ -403,7 +420,7 @@ my_decimal *Item::val_decimal_from_date(my_decimal *decimal_value)
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;
if (get_date(&ltime, sql_mode_for_dates(current_thd)))
if (get_temporal_with_sql_mode(&ltime))
{
my_decimal_set_zero(decimal_value);
null_value= 1; // set NULL, stop processing
@ -430,7 +447,7 @@ longlong Item::val_int_from_date()
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;
if (get_date(&ltime, 0))
if (get_temporal_with_sql_mode(&ltime))
return 0;
longlong v= TIME_to_ulonglong(&ltime);
return ltime.neg ? -v : v;
@ -441,7 +458,7 @@ double Item::val_real_from_date()
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;
if (get_date(&ltime, 0))
if (get_temporal_with_sql_mode(&ltime))
return 0;
return TIME_to_double(&ltime);
}

18
sql/item.h
View File

@ -971,6 +971,11 @@ public:
double val_real_from_decimal();
double val_real_from_date();
// Get TIME, DATE or DATETIME using proper sql_mode flags for the field type
bool get_temporal_with_sql_mode(MYSQL_TIME *ltime);
// Check NULL value for a TIME, DATE or DATETIME expression
bool is_null_from_temporal();
int save_time_in_field(Field *field);
int save_date_in_field(Field *field);
int save_str_value_in_field(Field *field, String *result);
@ -2933,6 +2938,9 @@ public:
bool check_partition_func_processor(uchar *int_arg) {return FALSE;}
bool check_vcol_func_processor(uchar *arg) { return FALSE;}
bool is_null()
{ return is_null_from_temporal(); }
bool get_date_with_sql_mode(MYSQL_TIME *to);
String *val_str(String *str)
{ return val_string_from_date(str); }
longlong val_int()
@ -2959,6 +2967,14 @@ public:
{
max_length= MAX_DATE_WIDTH;
fixed= 1;
/*
If date has zero month or day, it can return NULL in case of
NO_ZERO_DATE or NO_ZERO_IN_DATE.
We can't just check the current sql_mode here in constructor,
because sql_mode can change in case of prepared statements
between PREPARE and EXECUTE.
*/
maybe_null= !ltime->month || !ltime->day;
}
enum_field_types field_type() const { return MYSQL_TYPE_DATE; }
void print(String *str, enum_query_type query_type);
@ -2995,6 +3011,8 @@ public:
{
max_length= MAX_DATETIME_WIDTH + (decimals ? decimals + 1 : 0);
fixed= 1;
// See the comment on maybe_null in Item_date_literal
maybe_null= !ltime->month || !ltime->day;
}
enum_field_types field_type() const { return MYSQL_TYPE_DATETIME; }
void print(String *str, enum_query_type query_type);