Mirrors
/
mariadb
mirror of https://github.com/MariaDB/server
3
0
Fork 0
Code Releases Activity
Browse Source

Bug#18997: DATE_ADD and DATE_SUB perform year2K autoconversion magic on 4-digit year value 

if input year for date_add() / date_sub() with INTERVAL is low enough for
calc_daynr() to possibly return incorrect results (calc_daynr() has no information
on whether the year is low because it was a two-digit year ('77) or because it
was a really low four-digit year (0077) and will indiscriminately try to turn the
value into a four-digit year by adding 1900 or 2000 respectively), the functions
will now throw NULL.
pull/73/head
tnurnberg@mysql.com 20 years ago
parent
a31d16abe8
commit
d1311e1ac7
5 changed files with 67 additions and 29 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 3
      include/my_time.h
  2. 57
      mysql-test/r/func_time.result
  3. 31
      mysql-test/t/func_time.test
  4. 2
      sql-common/my_time.c
  5. 3
      sql/item_timefunc.cc

3
include/my_time.h
View File

@ -38,7 +38,10 @@ typedef long my_time_t;
#define MY_TIME_T_MAX LONG_MAX
#define MY_TIME_T_MIN LONG_MIN
/* two-digit years < this are 20..; >= this are 19.. */
#define YY_PART_YEAR 70
/* apply above magic to years < this */
#define YY_MAGIC_BELOW 200
/* Flags to str_to_datetime */
#define TIME_FUZZY_DATE 1

57
mysql-test/r/func_time.result
View File

@ -736,42 +736,28 @@ select last_day('2005-00-00');
last_day('2005-00-00')
NULL
Warnings:
Warning 1292 Truncated incorrect datetime value: '2005-00-00'
Warning 1292 Incorrect datetime value: '2005-00-00'
select last_day('2005-00-01');
last_day('2005-00-01')
NULL
Warnings:
Warning 1292 Truncated incorrect datetime value: '2005-00-01'
Warning 1292 Incorrect datetime value: '2005-00-01'
select last_day('2005-01-00');
last_day('2005-01-00')
NULL
Warnings:
Warning 1292 Truncated incorrect datetime value: '2005-01-00'
Warning 1292 Incorrect datetime value: '2005-01-00'
select monthname(str_to_date(null, '%m')), monthname(str_to_date(null, '%m')),
monthname(str_to_date(1, '%m')), monthname(str_to_date(0, '%m'));
monthname(str_to_date(null, '%m')) monthname(str_to_date(null, '%m')) monthname(str_to_date(1, '%m')) monthname(str_to_date(0, '%m'))
NULL NULL January NULL
End of 4.1 tests
explain extended select timestampdiff(SQL_TSI_WEEK, '2001-02-01', '2001-05-01') as a1,
timestampdiff(SQL_TSI_FRAC_SECOND, '2001-02-01 12:59:59.120000', '2001-05-01 12:58:58.119999') as a2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select timestampdiff(WEEK,_latin1'2001-02-01',_latin1'2001-05-01') AS `a1`,timestampdiff(SECOND_FRAC,_latin1'2001-02-01 12:59:59.120000',_latin1'2001-05-01 12:58:58.119999') AS `a2`
select last_day('2005-00-00');
last_day('2005-00-00')
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2005-00-00'
select last_day('2005-00-01');
last_day('2005-00-01')
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2005-00-01'
select last_day('2005-01-00');
last_day('2005-01-00')
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2005-01-00'
select time_format('100:00:00', '%H %k %h %I %l');
time_format('100:00:00', '%H %k %h %I %l')
100 100 04 04 4
@ -891,3 +877,38 @@ id day id day
1 2005-06-01 3 2005-07-15
3 2005-07-01 3 2005-07-15
DROP TABLE t1,t2;
End of 5.0 tests
select date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND)
NULL
select date_sub("0199-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0199-01-01 00:00:01",INTERVAL 2 SECOND)
NULL
select date_add("0199-12-31 23:59:59",INTERVAL 2 SECOND);
date_add("0199-12-31 23:59:59",INTERVAL 2 SECOND)
NULL
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND)
0199-12-31 23:59:59
select date_sub("0200-01-01 00:00:01",INTERVAL 1 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 1 SECOND)
0200-01-01 00:00:00
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND)
0199-12-31 23:59:59
select date_add("2001-01-01 23:59:59",INTERVAL -2000 YEAR);
date_add("2001-01-01 23:59:59",INTERVAL -2000 YEAR)
0001-01-01 23:59:59
select date_sub("50-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("50-01-01 00:00:01",INTERVAL 2 SECOND)
2049-12-31 23:59:59
select date_sub("90-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("90-01-01 00:00:01",INTERVAL 2 SECOND)
1989-12-31 23:59:59
select date_sub("0069-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0069-01-01 00:00:01",INTERVAL 2 SECOND)
NULL
select date_sub("0169-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0169-01-01 00:00:01",INTERVAL 2 SECOND)
NULL
End of 5.1 tests

31
mysql-test/t/func_time.test
View File

@ -367,19 +367,11 @@ select last_day('2005-01-00');
select monthname(str_to_date(null, '%m')), monthname(str_to_date(null, '%m')),
monthname(str_to_date(1, '%m')), monthname(str_to_date(0, '%m'));
# End of 4.1 tests
--echo End of 4.1 tests
explain extended select timestampdiff(SQL_TSI_WEEK, '2001-02-01', '2001-05-01') as a1,
timestampdiff(SQL_TSI_FRAC_SECOND, '2001-02-01 12:59:59.120000', '2001-05-01 12:58:58.119999') as a2;
#
# Bug #10568
#
select last_day('2005-00-00');
select last_day('2005-00-01');
select last_day('2005-01-00');
#
# Bug #10590: %h, %I, and %l format specifies should all return results in
# the 0-11 range
@ -482,4 +474,23 @@ SELECT * FROM t1, t2
DROP TABLE t1,t2;
# End of 5.0 tests
--echo End of 5.0 tests
#
# Bug #18997
#
select date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND);
select date_sub("0199-01-01 00:00:01",INTERVAL 2 SECOND);
select date_add("0199-12-31 23:59:59",INTERVAL 2 SECOND);
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
select date_sub("0200-01-01 00:00:01",INTERVAL 1 SECOND);
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
select date_add("2001-01-01 23:59:59",INTERVAL -2000 YEAR);
select date_sub("50-01-01 00:00:01",INTERVAL 2 SECOND);
select date_sub("90-01-01 00:00:01",INTERVAL 2 SECOND);
select date_sub("0069-01-01 00:00:01",INTERVAL 2 SECOND);
select date_sub("0169-01-01 00:00:01",INTERVAL 2 SECOND);
--echo End of 5.1 tests

2
sql-common/my_time.c
View File

@ -689,7 +689,7 @@ long calc_daynr(uint year,uint month,uint day)
if (year == 0 && month == 0 && day == 0)
DBUG_RETURN(0); /* Skip errors */
if (year < 200)
if (year < YY_MAGIC_BELOW)
{
if ((year=year+1900) < 1900+YY_PART_YEAR)
year+=100;

3
sql/item_timefunc.cc
View File

@ -1963,6 +1963,9 @@ bool Item_date_add_interval::get_date(TIME *ltime, uint fuzzy_date)
if (date_sub_interval)
interval.neg = !interval.neg;
if (ltime->year < YY_MAGIC_BELOW)
return (null_value=1);
return (null_value= date_add_interval(ltime, int_type, interval));
}

Write Preview
Loading…
Cancel
Save