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Commit 1b0f0b0a authored by unknown's avatar unknown
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Fix for bug #4756 "STR_TO_DATE() returning bad results with AM/PM". 

Added support of converion specifiers mentioned in manual but missing in code.


mysql-test/r/date_formats.result:
  Added tests of str_to_date() with new %T, %r and %V, %v conversion specifiers, and also 
  some other specifiers for which tests were missing previously.
mysql-test/t/date_formats.test:
  Added tests of str_to_date() and new %T, %r and %V, %v conversion specifiers, and also 
  some other specifiers for which tests were missing previously.
sql/item_timefunc.cc:
  Added support for %T, %r, %V, %v, %X, %x conversion specifiers to extract_date_time()
  function. Also simplified a bit calculation of dates from week number.
parent ea8ac8ab
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Showing with 189 additions and 41 deletions
mysql-test/r/date_formats.result
View file @ 1b0f0b0a
......@@ -90,16 +90,23 @@ insert into t1 values
('2003-01-02 11:11:12Pm', '%Y-%m-%d %h:%i:%S%p'),
('10:20:10', '%H:%i:%s'),
('10:20:10', '%h:%i:%s.%f'),
('10:20:10', '%T'),
('10:20:10AM', '%h:%i:%s%p'),
('10:20:10AM', '%r'),
('10:20:10.44AM', '%h:%i:%s.%f%p'),
('15-01-2001 12:59:58', '%d-%m-%Y %H:%i:%S'),
('15 September 2001', '%d %M %Y'),
('15 SEPTEMB 2001', '%d %M %Y'),
('15 MAY 2001', '%d %b %Y'),
('15th May 2001', '%D %b %Y'),
('Sunday 15 MAY 2001', '%W %d %b %Y'),
('Sund 15 MAY 2001', '%W %d %b %Y'),
('Tuesday 00 2002', '%W %U %Y'),
('Thursday 53 1998', '%W %u %Y'),
('Sunday 01 2001', '%W %v %x'),
('Tuesday 52 2001', '%W %V %X'),
('060 2004', '%j %Y'),
('4 53 1998', '%w %u %Y'),
('15-01-2001', '%d-%m-%Y %H:%i:%S'),
('15-01-20', '%d-%m-%y'),
('15-2001-1', '%d-%Y-%c');
......@@ -114,16 +121,23 @@ date format str_to_date
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12
10:20:10 %H:%i:%s 0000-00-00 10:20:10
10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10
10:20:10 %T 0000-00-00 10:20:10
10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10
10:20:10AM %r 0000-00-00 10:20:10
10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58
15 September 2001 %d %M %Y 2001-09-15 00:00:00
15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00
15 MAY 2001 %d %b %Y 2001-05-15 00:00:00
15th May 2001 %D %b %Y 2001-05-15 00:00:00
Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00
Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00
Sunday 01 2001 %W %v %x 2001-01-07 00:00:00
Tuesday 52 2001 %W %V %X 2002-01-01 00:00:00
060 2004 %j %Y 2004-02-29 00:00:00
4 53 1998 %w %u %Y 1998-12-31 00:00:00
15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00
15-01-20 %d-%m-%y 2020-01-15 00:00:00
15-2001-1 %d-%Y-%c 2001-01-15 00:00:00
......@@ -138,16 +152,23 @@ date format con
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12
10:20:10 %H:%i:%s 0000-00-00 10:20:10
10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10
10:20:10 %T 0000-00-00 10:20:10
10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10
10:20:10AM %r 0000-00-00 10:20:10
10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58
15 September 2001 %d %M %Y 2001-09-15 00:00:00
15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00
15 MAY 2001 %d %b %Y 2001-05-15 00:00:00
15th May 2001 %D %b %Y 2001-05-15 00:00:00
Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00
Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00
Sunday 01 2001 %W %v %x 2001-01-07 00:00:00
Tuesday 52 2001 %W %V %X 2002-01-01 00:00:00
060 2004 %j %Y 2004-02-29 00:00:00
4 53 1998 %w %u %Y 1998-12-31 00:00:00
15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00
15-01-20 %d-%m-%y 2020-01-15 00:00:00
15-2001-1 %d-%Y-%c 2001-01-15 00:00:00
......@@ -162,16 +183,23 @@ date format datetime
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12
10:20:10 %H:%i:%s 0000-00-00 10:20:10
10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10
10:20:10 %T 0000-00-00 10:20:10
10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10
10:20:10AM %r 0000-00-00 10:20:10
10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58
15 September 2001 %d %M %Y 2001-09-15 00:00:00
15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00
15 MAY 2001 %d %b %Y 2001-05-15 00:00:00
15th May 2001 %D %b %Y 2001-05-15 00:00:00
Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00
Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00
Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00
Sunday 01 2001 %W %v %x 2001-01-07 00:00:00
Tuesday 52 2001 %W %V %X 2002-01-01 00:00:00
060 2004 %j %Y 2004-02-29 00:00:00
4 53 1998 %w %u %Y 1998-12-31 00:00:00
15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00
15-01-20 %d-%m-%y 2020-01-15 00:00:00
15-2001-1 %d-%Y-%c 2001-01-15 00:00:00
......@@ -186,16 +214,23 @@ date format date2
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02
10:20:10 %H:%i:%s 0000-00-00
10:20:10 %h:%i:%s.%f 0000-00-00
10:20:10 %T 0000-00-00
10:20:10AM %h:%i:%s%p 0000-00-00
10:20:10AM %r 0000-00-00
10:20:10.44AM %h:%i:%s.%f%p 0000-00-00
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15
15 September 2001 %d %M %Y 2001-09-15
15 SEPTEMB 2001 %d %M %Y 2001-09-15
15 MAY 2001 %d %b %Y 2001-05-15
15th May 2001 %D %b %Y 2001-05-15
Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15
Sund 15 MAY 2001 %W %d %b %Y 2001-05-15
Tuesday 00 2002 %W %U %Y 2002-01-01
Thursday 53 1998 %W %u %Y 1998-12-31
Sunday 01 2001 %W %v %x 2001-01-07
Tuesday 52 2001 %W %V %X 2002-01-01
060 2004 %j %Y 2004-02-29
4 53 1998 %w %u %Y 1998-12-31
15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15
15-01-20 %d-%m-%y 2020-01-15
15-2001-1 %d-%Y-%c 2001-01-15
......@@ -210,16 +245,23 @@ date format time
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 23:11:12
10:20:10 %H:%i:%s 10:20:10
10:20:10 %h:%i:%s.%f 10:20:10
10:20:10 %T 10:20:10
10:20:10AM %h:%i:%s%p 10:20:10
10:20:10AM %r 10:20:10
10:20:10.44AM %h:%i:%s.%f%p 10:20:10.440000
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 12:59:58
15 September 2001 %d %M %Y 00:00:00
15 SEPTEMB 2001 %d %M %Y 00:00:00
15 MAY 2001 %d %b %Y 00:00:00
15th May 2001 %D %b %Y 00:00:00
Sunday 15 MAY 2001 %W %d %b %Y 00:00:00
Sund 15 MAY 2001 %W %d %b %Y 00:00:00
Tuesday 00 2002 %W %U %Y 00:00:00
Thursday 53 1998 %W %u %Y 00:00:00
Sunday 01 2001 %W %v %x 00:00:00
Tuesday 52 2001 %W %V %X 00:00:00
060 2004 %j %Y 00:00:00
4 53 1998 %w %u %Y 00:00:00
15-01-2001 %d-%m-%Y %H:%i:%S 00:00:00
15-01-20 %d-%m-%y 00:00:00
15-2001-1 %d-%Y-%c 00:00:00
......@@ -234,16 +276,23 @@ date format time2
2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 23:11:12
10:20:10 %H:%i:%s 10:20:10
10:20:10 %h:%i:%s.%f 10:20:10
10:20:10 %T 10:20:10
10:20:10AM %h:%i:%s%p 10:20:10
10:20:10AM %r 10:20:10
10:20:10.44AM %h:%i:%s.%f%p 10:20:10.440000
15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 12:59:58
15 September 2001 %d %M %Y 00:00:00
15 SEPTEMB 2001 %d %M %Y 00:00:00
15 MAY 2001 %d %b %Y 00:00:00
15th May 2001 %D %b %Y 00:00:00
Sunday 15 MAY 2001 %W %d %b %Y 00:00:00
Sund 15 MAY 2001 %W %d %b %Y 00:00:00
Tuesday 00 2002 %W %U %Y 00:00:00
Thursday 53 1998 %W %u %Y 00:00:00
Sunday 01 2001 %W %v %x 00:00:00
Tuesday 52 2001 %W %V %X 00:00:00
060 2004 %j %Y 00:00:00
4 53 1998 %w %u %Y 00:00:00
15-01-2001 %d-%m-%Y %H:%i:%S 00:00:00
15-01-20 %d-%m-%y 00:00:00
15-2001-1 %d-%Y-%c 00:00:00
......@@ -258,10 +307,13 @@ insert into t1 values
('15 Septembei 2001', '%d %M %Y'),
('15 Ju 2001', '%d %M %Y'),
('Sund 15 MA', '%W %d %b %Y'),
('Sunday 01 2001', '%W %V %X'),
('Thursdai 12 1998', '%W %u %Y'),
(NULL, get_format(DATE,'USA')),
('Tuesday 52 2001', '%W %V %X');
('Sunday 01 2001', '%W %v %X'),
('Tuesday 52 2001', '%W %V %x'),
('Tuesday 52 2001', '%W %V %Y'),
('Tuesday 52 2001', '%W %u %x'),
('7 53 1998', '%w %u %Y'),
(NULL, get_format(DATE,'USA'));
select date,format,str_to_date(date, format) as str_to_date from t1;
date format str_to_date
2003-01-02 10:11:12 PM %Y-%m-%d %H:%i:%S %p NULL
......@@ -273,10 +325,13 @@ date format str_to_date
15 Septembei 2001 %d %M %Y NULL
15 Ju 2001 %d %M %Y NULL
Sund 15 MA %W %d %b %Y NULL
Sunday 01 2001 %W %V %X NULL
Thursdai 12 1998 %W %u %Y NULL
Sunday 01 2001 %W %v %X NULL
Tuesday 52 2001 %W %V %x NULL
Tuesday 52 2001 %W %V %Y NULL
Tuesday 52 2001 %W %u %x NULL
7 53 1998 %w %u %Y NULL
NULL %m.%d.%Y NULL
Tuesday 52 2001 %W %V %X NULL
select date,format,concat(str_to_date(date, format),'') as con from t1;
date format con
2003-01-02 10:11:12 PM %Y-%m-%d %H:%i:%S %p NULL
......@@ -288,10 +343,13 @@ date format con
15 Septembei 2001 %d %M %Y NULL
15 Ju 2001 %d %M %Y NULL
Sund 15 MA %W %d %b %Y NULL
Sunday 01 2001 %W %V %X NULL
Thursdai 12 1998 %W %u %Y NULL
Sunday 01 2001 %W %v %X NULL
Tuesday 52 2001 %W %V %x NULL
Tuesday 52 2001 %W %V %Y NULL
Tuesday 52 2001 %W %u %x NULL
7 53 1998 %w %u %Y NULL
NULL %m.%d.%Y NULL
Tuesday 52 2001 %W %V %X NULL
truncate table t1;
insert into t1 values
('10:20:10AM', '%h:%i:%s'),
......
mysql-test/t/date_formats.test
View file @ 1b0f0b0a
......@@ -132,16 +132,23 @@ insert into t1 values
('2003-01-02 11:11:12Pm', '%Y-%m-%d %h:%i:%S%p'),
('10:20:10', '%H:%i:%s'),
('10:20:10', '%h:%i:%s.%f'),
('10:20:10', '%T'),
('10:20:10AM', '%h:%i:%s%p'),
('10:20:10AM', '%r'),
('10:20:10.44AM', '%h:%i:%s.%f%p'),
('15-01-2001 12:59:58', '%d-%m-%Y %H:%i:%S'),
('15 September 2001', '%d %M %Y'),
('15 SEPTEMB 2001', '%d %M %Y'),
('15 MAY 2001', '%d %b %Y'),
('15th May 2001', '%D %b %Y'),
('Sunday 15 MAY 2001', '%W %d %b %Y'),
('Sund 15 MAY 2001', '%W %d %b %Y'),
('Tuesday 00 2002', '%W %U %Y'),
('Thursday 53 1998', '%W %u %Y'),
('Sunday 01 2001', '%W %v %x'),
('Tuesday 52 2001', '%W %V %X'),
('060 2004', '%j %Y'),
('4 53 1998', '%w %u %Y'),
('15-01-2001', '%d-%m-%Y %H:%i:%S'),
('15-01-20', '%d-%m-%y'),
('15-2001-1', '%d-%Y-%c');
......@@ -156,7 +163,7 @@ select date,format,DATE(str_to_date(date, format)) as date2 from t1;
select date,format,TIME(str_to_date(date, format)) as time from t1;
select date,format,concat(TIME(str_to_date(date, format))) as time2 from t1;
# Test wrong dates
# Test wrong dates or converion specifiers
truncate table t1;
insert into t1 values
......@@ -169,10 +176,13 @@ insert into t1 values
('15 Septembei 2001', '%d %M %Y'),
('15 Ju 2001', '%d %M %Y'),
('Sund 15 MA', '%W %d %b %Y'),
('Sunday 01 2001', '%W %V %X'),
('Thursdai 12 1998', '%W %u %Y'),
(NULL, get_format(DATE,'USA')),
('Tuesday 52 2001', '%W %V %X');
('Sunday 01 2001', '%W %v %X'),
('Tuesday 52 2001', '%W %V %x'),
('Tuesday 52 2001', '%W %V %Y'),
('Tuesday 52 2001', '%W %u %x'),
('7 53 1998', '%w %u %Y'),
(NULL, get_format(DATE,'USA'));
select date,format,str_to_date(date, format) as str_to_date from t1;
select date,format,concat(str_to_date(date, format),'') as con from t1;
......
sql/item_timefunc.cc
View file @ 1b0f0b0a
......@@ -113,6 +113,12 @@ static bool make_datetime(date_time_format_types format, TIME *ltime,
}
/* Date formats corresponding to compound %r and %T conversion specifiers */
static DATE_TIME_FORMAT time_ampm_format= {{}, '\0', 0,
{(char *)"%I:%i:%S %p", 11}};
static DATE_TIME_FORMAT time_24hrs_format= {{}, '\0', 0,
{(char *)"%H:%i:%S", 8}};
/*
Extract datetime value to TIME struct from string value
according to format string.
......@@ -126,6 +132,17 @@ static bool make_datetime(date_time_format_types format, TIME *ltime,
cached_timestamp_type
It uses to get an appropriate warning
in the case when the value is truncated.
sub_pattern_end if non-zero then we are parsing string which
should correspond compound specifier (like %T or
%r) and this parameter is pointer to place where
pointer to end of string matching this specifier
should be stored.
NOTE
Possibility to parse strings matching to patterns equivalent to compound
specifiers is mainly intended for use from inside of this function in
order to understand %T and %r conversion specifiers, so number of
conversion specifiers that can be used in such sub-patterns is limited.
Also most of checks are skipped in this case.
RETURN
0 ok
......@@ -134,14 +151,18 @@ static bool make_datetime(date_time_format_types format, TIME *ltime,
static bool extract_date_time(DATE_TIME_FORMAT *format,
const char *val, uint length, TIME *l_time,
timestamp_type cached_timestamp_type)
timestamp_type cached_timestamp_type,
const char **sub_pattern_end)
{
int weekday= 0, yearday= 0, daypart= 0;
int week_number= -1;
CHARSET_INFO *cs= &my_charset_bin;
int error= 0;
bool usa_time= 0;
bool sunday_first= 0;
bool sunday_first_n_first_week_non_iso;
bool strict_week_number;
int strict_week_number_year= -1;
bool strict_week_number_year_type;
int frac_part;
const char *val_begin= val;
const char *val_end= val + length;
......@@ -149,7 +170,12 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
const char *end= ptr + format->format.length;
DBUG_ENTER("extract_date_time");
bzero((char*) l_time, sizeof(*l_time));
LINT_INIT(sunday_first_n_first_week_non_iso);
LINT_INIT(strict_week_number);
LINT_INIT(strict_week_number_year_type);
if (!sub_pattern_end)
bzero((char*) l_time, sizeof(*l_time));
for (; ptr != end && val != val_end; ptr++)
{
......@@ -160,7 +186,7 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
char *tmp;
/* Skip pre-space between each argument */
while (my_isspace(cs, *val) && val != val_end)
while (val != val_end && my_isspace(cs, *val))
val++;
val_len= (uint) (val_end - val);
......@@ -268,9 +294,12 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
break;
case 'w':
tmp= (char*) val + 1;
if ((weekday= (int) my_strtoll10(val, &tmp, &error)) <= 0 ||
if ((weekday= (int) my_strtoll10(val, &tmp, &error)) < 0 ||
weekday >= 7)
goto err;
/* We should use the same 1 - 7 scale for %w as for %W */
if (!weekday)
weekday= 7;
val= tmp;
break;
case 'j':
......@@ -279,15 +308,45 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
val= tmp;
break;
/* Week numbers */
case 'V':
case 'U':
sunday_first= 1;
/* Fall through */
case 'v':
case 'u':
sunday_first_n_first_week_non_iso= (*ptr=='U' || *ptr== 'V');
strict_week_number= (*ptr=='V' || *ptr=='v');
tmp= (char*) val + min(val_len, 2);
week_number= (int) my_strtoll10(val, &tmp, &error);
if ((week_number= (int) my_strtoll10(val, &tmp, &error)) < 0 ||
strict_week_number && !week_number ||
week_number > 53)
goto err;
val= tmp;
break;
/* Year used with 'strict' %V and %v week numbers */
case 'X':
case 'x':
strict_week_number_year_type= (*ptr=='X');
tmp= (char*) val + min(4, val_len);
strict_week_number_year= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
/* Time in AM/PM notation */
case 'r':
error= extract_date_time(&time_ampm_format, val,
(uint)(val_end - val), l_time,
cached_timestamp_type, &val);
break;
/* Time in 24-hour notation */
case 'T':
error= extract_date_time(&time_24hrs_format, val,
(uint)(val_end - val), l_time,
cached_timestamp_type, &val);
break;
/* Conversion specifiers that match classes of characters */
case '.':
while (my_ispunct(cs, *val) && val != val_end)
val++;
......@@ -320,6 +379,16 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
l_time->hour= l_time->hour%12+daypart;
}
/*
If we are recursively called for parsing string matching compound
specifiers we are already done.
*/
if (sub_pattern_end)
{
*sub_pattern_end= val;
DBUG_RETURN(0);
}
if (yearday > 0)
{
uint days= calc_daynr(l_time->year,1,1) + yearday - 1;
......@@ -330,34 +399,45 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
if (week_number >= 0 && weekday)
{
int days= calc_daynr(l_time->year,1,1);
int days;
uint weekday_b;
if (weekday > 7 || weekday < 0)
goto err;
if (sunday_first)
weekday = weekday%7;
if (week_number == 53)
{
days+= (week_number - 1)*7;
weekday_b= calc_weekday(days, sunday_first);
weekday = weekday - weekday_b - !sunday_first;
days+= weekday;
}
else if (week_number == 0)
/*
%V,%v require %X,%x resprectively,
%U,%u should be used with %Y and not %X or %x
*/
if (strict_week_number &&
(strict_week_number_year < 0 ||
strict_week_number_year_type != sunday_first_n_first_week_non_iso) ||
!strict_week_number && strict_week_number_year >= 0)
goto err;
/* Number of days since year 0 till 1st Jan of this year */
days= calc_daynr((strict_week_number ? strict_week_number_year :
l_time->year),
1, 1);
/* Which day of week is 1st Jan of this year */
weekday_b= calc_weekday(days, sunday_first_n_first_week_non_iso);
/*
Below we are going to sum:
1) number of days since year 0 till 1st day of 1st week of this year
2) number of days between 1st week and our week
3) and position of our day in the week
*/
if (sunday_first_n_first_week_non_iso)
{
weekday_b= calc_weekday(days, sunday_first);
weekday = weekday - weekday_b - !sunday_first;
days+= weekday;
days+= ((weekday_b == 0) ? 0 : 7) - weekday_b +
(week_number - 1) * 7 +
weekday % 7;
}
else
{
days+= (week_number - !sunday_first)*7;
weekday_b= calc_weekday(days, sunday_first);
weekday =weekday - weekday_b - !sunday_first;
days+= weekday;
days+= ((weekday_b <= 3) ? 0 : 7) - weekday_b +
(week_number - 1) * 7 +
(weekday - 1);
}
if (days <= 0 || days >= MAX_DAY_NUMBER)
goto err;
get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day);
......@@ -2599,7 +2679,7 @@ bool Item_func_str_to_date::get_date(TIME *ltime, uint fuzzy_date)
date_time_format.format.str= (char*) format->ptr();
date_time_format.format.length= format->length();
if (extract_date_time(&date_time_format, val->ptr(), val->length(),
ltime, cached_timestamp_type))
ltime, cached_timestamp_type, 0))
goto null_date;
if (cached_timestamp_type == MYSQL_TIMESTAMP_TIME && ltime->day)
{
......
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