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item_timefunc.cc
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/* Copyright (C) 2000-2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/**
@file
@brief
This file defines all time functions
@todo
Move month and days to language files
*/
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <m_ctype.h>
#include <time.h>
/** Day number for Dec 31st, 9999. */
#define MAX_DAY_NUMBER 3652424L
/**
@todo
OPTIMIZATION
- Replace the switch with a function that should be called for each
date type.
- Remove sprintf and opencode the conversion, like we do in
Field_datetime.
The reason for this functions existence is that as we don't have a
way to know if a datetime/time value has microseconds in them
we are now only adding microseconds to the output if the
value has microseconds.
We can't use a standard make_date_time() for this as we don't know
if someone will use %f in the format specifier in which case we would get
the microseconds twice.
*/
static bool make_datetime(date_time_format_types format, MYSQL_TIME *ltime,
String *str)
{
char *buff;
CHARSET_INFO *cs= &my_charset_bin;
uint length= MAX_DATE_STRING_REP_LENGTH;
if (str->alloc(length))
return 1;
buff= (char*) str->ptr();
switch (format) {
case TIME_ONLY:
length= cs->cset->snprintf(cs, buff, length, "%s%02d:%02d:%02d",
ltime->neg ? "-" : "",
ltime->hour, ltime->minute, ltime->second);
break;
case TIME_MICROSECOND:
length= cs->cset->snprintf(cs, buff, length, "%s%02d:%02d:%02d.%06ld",
ltime->neg ? "-" : "",
ltime->hour, ltime->minute, ltime->second,
ltime->second_part);
break;
case DATE_ONLY:
length= cs->cset->snprintf(cs, buff, length, "%04d-%02d-%02d",
ltime->year, ltime->month, ltime->day);
break;
case DATE_TIME:
length= cs->cset->snprintf(cs, buff, length,
"%04d-%02d-%02d %02d:%02d:%02d",
ltime->year, ltime->month, ltime->day,
ltime->hour, ltime->minute, ltime->second);
break;
case DATE_TIME_MICROSECOND:
length= cs->cset->snprintf(cs, buff, length,
"%04d-%02d-%02d %02d:%02d:%02d.%06ld",
ltime->year, ltime->month, ltime->day,
ltime->hour, ltime->minute, ltime->second,
ltime->second_part);
break;
}
str->length(length);
str->set_charset(cs);
return 0;
}
/*
Wrapper over make_datetime() with validation of the input MYSQL_TIME value
NOTE
see make_datetime() for more information
RETURN
1 if there was an error during converion
0 otherwise
*/
static bool make_datetime_with_warn(date_time_format_types format, MYSQL_TIME *ltime,
String *str)
{
int warning= 0;
if (make_datetime(format, ltime, str))
return 1;
if (check_time_range(ltime, &warning))
return 1;
if (!warning)
return 0;
make_truncated_value_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
str->ptr(), str->length(),
MYSQL_TIMESTAMP_TIME, NullS);
return make_datetime(format, ltime, str);
}
/*
Wrapper over make_time() with validation of the input MYSQL_TIME value
NOTE
see make_time() for more info
RETURN
1 if there was an error during conversion
0 otherwise
*/
static bool make_time_with_warn(const DATE_TIME_FORMAT *format,
MYSQL_TIME *l_time, String *str)
{
int warning= 0;
make_time(format, l_time, str);
if (check_time_range(l_time, &warning))
return 1;
if (warning)
{
make_truncated_value_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
str->ptr(), str->length(),
MYSQL_TIMESTAMP_TIME, NullS);
make_time(format, l_time, str);
}
return 0;
}
/*
Convert seconds to MYSQL_TIME value with overflow checking
SYNOPSIS:
sec_to_time()
seconds number of seconds
unsigned_flag 1, if 'seconds' is unsigned, 0, otherwise
ltime output MYSQL_TIME value
DESCRIPTION
If the 'seconds' argument is inside MYSQL_TIME data range, convert it to a
corresponding value.
Otherwise, truncate the resulting value to the nearest endpoint, and
produce a warning message.
RETURN
1 if the value was truncated during conversion
0 otherwise
*/
static bool sec_to_time(longlong seconds, bool unsigned_flag, MYSQL_TIME *ltime)
{
uint sec;
bzero((char *)ltime, sizeof(*ltime));
if (seconds < 0)
{
if (unsigned_flag)
goto overflow;
ltime->neg= 1;
if (seconds < -3020399)
goto overflow;
seconds= -seconds;
}
else if (seconds > 3020399)
goto overflow;
sec= (uint) ((ulonglong) seconds % 3600);
ltime->hour= (uint) (seconds/3600);
ltime->minute= sec/60;
ltime->second= sec % 60;
return 0;
overflow:
ltime->hour= TIME_MAX_HOUR;
ltime->minute= TIME_MAX_MINUTE;
ltime->second= TIME_MAX_SECOND;
char buf[22];
int len= (int)(longlong10_to_str(seconds, buf, unsigned_flag ? 10 : -10)
- buf);
make_truncated_value_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
buf, len, MYSQL_TIMESTAMP_TIME,
NullS);
return 1;
}
/*
Date formats corresponding to compound %r and %T conversion specifiers
Note: We should init at least first element of "positions" array
(first member) or hpux11 compiler will die horribly.
*/
static DATE_TIME_FORMAT time_ampm_format= {{0}, '\0', 0,
{(char *)"%I:%i:%S %p", 11}};
static DATE_TIME_FORMAT time_24hrs_format= {{0}, '\0', 0,
{(char *)"%H:%i:%S", 8}};
/**
Extract datetime value to MYSQL_TIME struct from string value
according to format string.
@param format date/time format specification
@param val String to decode
@param length Length of string
@param l_time Store result here
@param cached_timestamp_type It uses to get an appropriate warning
in the case when the value is truncated.
@param 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.
@note
If one adds new format specifiers to this function he should also
consider adding them to get_date_time_result_type() function.
@retval
0 ok
@retval
1 error
*/
static bool extract_date_time(DATE_TIME_FORMAT *format,
const char *val, uint length, MYSQL_TIME *l_time,
timestamp_type cached_timestamp_type,
const char **sub_pattern_end,
const char *date_time_type)
{
int weekday= 0, yearday= 0, daypart= 0;
int week_number= -1;
int error= 0;
int strict_week_number_year= -1;
int frac_part;
bool usa_time= 0;
bool sunday_first_n_first_week_non_iso;
bool strict_week_number;
bool strict_week_number_year_type;
const char *val_begin= val;
const char *val_end= val + length;
const char *ptr= format->format.str;
const char *end= ptr + format->format.length;
CHARSET_INFO *cs= &my_charset_bin;
DBUG_ENTER("extract_date_time");
LINT_INIT(strict_week_number);
/* Remove valgrind varnings when using gcc 3.3 and -O1 */
PURIFY_OR_LINT_INIT(strict_week_number_year_type);
PURIFY_OR_LINT_INIT(sunday_first_n_first_week_non_iso);
if (!sub_pattern_end)
bzero((char*) l_time, sizeof(*l_time));
for (; ptr != end && val != val_end; ptr++)
{
/* Skip pre-space between each argument */
while (val != val_end && my_isspace(cs, *val))
val++;
if (*ptr == '%' && ptr+1 != end)
{
int val_len;
char *tmp;
error= 0;
val_len= (uint) (val_end - val);
switch (*++ptr) {
/* Year */
case 'Y':
tmp= (char*) val + min(4, val_len);
l_time->year= (int) my_strtoll10(val, &tmp, &error);
if ((int) (tmp-val) <= 2)
l_time->year= year_2000_handling(l_time->year);
val= tmp;
break;
case 'y':
tmp= (char*) val + min(2, val_len);
l_time->year= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
l_time->year= year_2000_handling(l_time->year);
break;
/* Month */
case 'm':
case 'c':
tmp= (char*) val + min(2, val_len);
l_time->month= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
case 'M':
if ((l_time->month= check_word(my_locale_en_US.month_names,
val, val_end, &val)) <= 0)
goto err;
break;
case 'b':
if ((l_time->month= check_word(my_locale_en_US.ab_month_names,
val, val_end, &val)) <= 0)
goto err;
break;
/* Day */
case 'd':
case 'e':
tmp= (char*) val + min(2, val_len);
l_time->day= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
case 'D':
tmp= (char*) val + min(2, val_len);
l_time->day= (int) my_strtoll10(val, &tmp, &error);
/* Skip 'st, 'nd, 'th .. */
val= tmp + min((int) (val_end-tmp), 2);
break;
/* Hour */
case 'h':
case 'I':
case 'l':
usa_time= 1;
/* fall through */
case 'k':
case 'H':
tmp= (char*) val + min(2, val_len);
l_time->hour= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
/* Minute */
case 'i':
tmp= (char*) val + min(2, val_len);
l_time->minute= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
/* Second */
case 's':
case 'S':
tmp= (char*) val + min(2, val_len);
l_time->second= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
/* Second part */
case 'f':
tmp= (char*) val_end;
if (tmp - val > 6)
tmp= (char*) val + 6;
l_time->second_part= (int) my_strtoll10(val, &tmp, &error);
frac_part= 6 - (tmp - val);
if (frac_part > 0)
l_time->second_part*= (ulong) log_10_int[frac_part];
val= tmp;
break;
/* AM / PM */
case 'p':
if (val_len < 2 || ! usa_time)
goto err;
if (!my_strnncoll(&my_charset_latin1,
(const uchar *) val, 2,
(const uchar *) "PM", 2))
daypart= 12;
else if (my_strnncoll(&my_charset_latin1,
(const uchar *) val, 2,
(const uchar *) "AM", 2))
goto err;
val+= 2;
break;
/* Exotic things */
case 'W':
if ((weekday= check_word(my_locale_en_US.day_names, val, val_end, &val)) <= 0)
goto err;
break;
case 'a':
if ((weekday= check_word(my_locale_en_US.ab_day_names, val, val_end, &val)) <= 0)
goto err;
break;
case 'w':
tmp= (char*) val + 1;
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':
tmp= (char*) val + min(val_len, 3);
yearday= (int) my_strtoll10(val, &tmp, &error);
val= tmp;
break;
/* Week numbers */
case 'V':
case 'U':
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);
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':
/*
We can't just set error here, as we don't want to generate two
warnings in case of errors
*/
if (extract_date_time(&time_ampm_format, val,
(uint)(val_end - val), l_time,
cached_timestamp_type, &val, "time"))
DBUG_RETURN(1);
break;
/* Time in 24-hour notation */
case 'T':
if (extract_date_time(&time_24hrs_format, val,
(uint)(val_end - val), l_time,
cached_timestamp_type, &val, "time"))
DBUG_RETURN(1);
break;
/* Conversion specifiers that match classes of characters */
case '.':
while (my_ispunct(cs, *val) && val != val_end)
val++;
break;
case '@':
while (my_isalpha(cs, *val) && val != val_end)
val++;
break;
case '#':
while (my_isdigit(cs, *val) && val != val_end)
val++;
break;
default:
goto err;
}
if (error) // Error from my_strtoll10
goto err;
}
else if (!my_isspace(cs, *ptr))
{
if (*val != *ptr)
goto err;
val++;
}
}
if (usa_time)
{
if (l_time->hour > 12 || l_time->hour < 1)
goto err;
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;
days= calc_daynr(l_time->year,1,1) + yearday - 1;
if (days <= 0 || days > MAX_DAY_NUMBER)
goto err;
get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day);
}
if (week_number >= 0 && weekday)
{
int days;
uint weekday_b;
/*
%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)
{
days+= ((weekday_b == 0) ? 0 : 7) - weekday_b +
(week_number - 1) * 7 +
weekday % 7;
}
else
{
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);
}
if (l_time->month > 12 || l_time->day > 31 || l_time->hour > 23 ||
l_time->minute > 59 || l_time->second > 59)
goto err;
if (val != val_end)
{
do
{
if (!my_isspace(&my_charset_latin1,*val))
{
make_truncated_value_warning(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
val_begin, length,
cached_timestamp_type, NullS);
break;
}
} while (++val != val_end);
}
DBUG_RETURN(0);
err:
{
char buff[128];
strmake(buff, val_begin, min(length, sizeof(buff)-1));
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
ER_WRONG_VALUE_FOR_TYPE, ER(ER_WRONG_VALUE_FOR_TYPE),
date_time_type, buff, "str_to_date");
}
DBUG_RETURN(1);
}
/**
Create a formated date/time value in a string.
*/
bool make_date_time(DATE_TIME_FORMAT *format, MYSQL_TIME *l_time,
timestamp_type type, String *str)
{
char intbuff[15];
uint hours_i;
uint weekday;
ulong length;
const char *ptr, *end;
THD *thd= current_thd;
MY_LOCALE *locale= thd->variables.lc_time_names;
str->length(0);
if (l_time->neg)
str->append('-');
end= (ptr= format->format.str) + format->format.length;
for (; ptr != end ; ptr++)
{
if (*ptr != '%' || ptr+1 == end)
str->append(*ptr);
else
{
switch (*++ptr) {
case 'M':
if (!l_time->month)
return 1;
str->append(locale->month_names->type_names[l_time->month-1],
strlen(locale->month_names->type_names[l_time->month-1]),
system_charset_info);
break;
case 'b':
if (!l_time->month)
return 1;
str->append(locale->ab_month_names->type_names[l_time->month-1],
strlen(locale->ab_month_names->type_names[l_time->month-1]),
system_charset_info);
break;
case 'W':
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
weekday= calc_weekday(calc_daynr(l_time->year,l_time->month,
l_time->day),0);
str->append(locale->day_names->type_names[weekday],
strlen(locale->day_names->type_names[weekday]),
system_charset_info);
break;
case 'a':
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
weekday=calc_weekday(calc_daynr(l_time->year,l_time->month,
l_time->day),0);
str->append(locale->ab_day_names->type_names[weekday],
strlen(locale->ab_day_names->type_names[weekday]),
system_charset_info);
break;
case 'D':
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
length= int10_to_str(l_time->day, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
if (l_time->day >= 10 && l_time->day <= 19)
str->append(STRING_WITH_LEN("th"));
else
{
switch (l_time->day %10) {
case 1:
str->append(STRING_WITH_LEN("st"));
break;
case 2:
str->append(STRING_WITH_LEN("nd"));
break;
case 3:
str->append(STRING_WITH_LEN("rd"));
break;
default:
str->append(STRING_WITH_LEN("th"));
break;
}
}
break;
case 'Y':
length= int10_to_str(l_time->year, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 4, '0');
break;
case 'y':
length= int10_to_str(l_time->year%100, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'm':
length= int10_to_str(l_time->month, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'c':
length= int10_to_str(l_time->month, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
break;
case 'd':
length= int10_to_str(l_time->day, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'e':
length= int10_to_str(l_time->day, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
break;
case 'f':
length= int10_to_str(l_time->second_part, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 6, '0');
break;
case 'H':
length= int10_to_str(l_time->hour, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'h':
case 'I':
hours_i= (l_time->hour%24 + 11)%12+1;
length= int10_to_str(hours_i, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'i': /* minutes */
length= int10_to_str(l_time->minute, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'j':
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
length= int10_to_str(calc_daynr(l_time->year,l_time->month,
l_time->day) -
calc_daynr(l_time->year,1,1) + 1, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 3, '0');
break;
case 'k':
length= int10_to_str(l_time->hour, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
break;
case 'l':
hours_i= (l_time->hour%24 + 11)%12+1;
length= int10_to_str(hours_i, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
break;
case 'p':
hours_i= l_time->hour%24;
str->append(hours_i < 12 ? "AM" : "PM",2);
break;
case 'r':
length= my_sprintf(intbuff,
(intbuff,
((l_time->hour % 24) < 12) ?
"%02d:%02d:%02d AM" : "%02d:%02d:%02d PM",
(l_time->hour+11)%12+1,
l_time->minute,
l_time->second));
str->append(intbuff, length);
break;
case 'S':
case 's':
length= int10_to_str(l_time->second, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
break;
case 'T':
length= my_sprintf(intbuff,
(intbuff,
"%02d:%02d:%02d",
l_time->hour,
l_time->minute,
l_time->second));
str->append(intbuff, length);
break;
case 'U':
case 'u':
{
uint year;
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
length= int10_to_str(calc_week(l_time,
(*ptr) == 'U' ?
WEEK_FIRST_WEEKDAY : WEEK_MONDAY_FIRST,
&year),
intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
}
break;
case 'v':
case 'V':
{
uint year;
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
length= int10_to_str(calc_week(l_time,
((*ptr) == 'V' ?
(WEEK_YEAR | WEEK_FIRST_WEEKDAY) :
(WEEK_YEAR | WEEK_MONDAY_FIRST)),
&year),
intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 2, '0');
}
break;
case 'x':
case 'X':
{
uint year;
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
(void) calc_week(l_time,
((*ptr) == 'X' ?
WEEK_YEAR | WEEK_FIRST_WEEKDAY :
WEEK_YEAR | WEEK_MONDAY_FIRST),
&year);
length= int10_to_str(year, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 4, '0');
}
break;
case 'w':
if (type == MYSQL_TIMESTAMP_TIME)
return 1;
weekday=calc_weekday(calc_daynr(l_time->year,l_time->month,
l_time->day),1);
length= int10_to_str(weekday, intbuff, 10) - intbuff;
str->append_with_prefill(intbuff, length, 1, '0');
break;
default:
str->append(*ptr);
break;
}
}
}
return 0;
}
/**
@details
Get a array of positive numbers from a string object.
Each number is separated by 1 non digit character
Return error if there is too many numbers.
If there is too few numbers, assume that the numbers are left out
from the high end. This allows one to give:
DAY_TO_SECOND as "D MM:HH:SS", "MM:HH:SS" "HH:SS" or as seconds.
@param length: length of str
@param cs: charset of str
@param values: array of results
@param count: count of elements in result array
@param transform_msec: if value is true we suppose
that the last part of string value is microseconds
and we should transform value to six digit value.
For example, '1.1' -> '1.100000'
*/
static bool get_interval_info(const char *str,uint length,CHARSET_INFO *cs,
uint count, ulonglong *values,
bool transform_msec)
{
const char *end=str+length;
uint i;
while (str != end && !my_isdigit(cs,*str))
str++;
for (i=0 ; i < count ; i++)
{
longlong value;
const char *start= str;
for (value=0; str != end && my_isdigit(cs,*str) ; str++)
value= value*LL(10) + (longlong) (*str - '0');
if (transform_msec && i == count - 1) // microseconds always last
{
long msec_length= 6 - (str - start);
if (msec_length > 0)
value*= (long) log_10_int[msec_length];
}
values[i]= value;
while (str != end && !my_isdigit(cs,*str))
str++;
if (str == end && i != count-1)
{
i++;
/* Change values[0...i-1] -> values[0...count-1] */
bmove_upp((uchar*) (values+count), (uchar*) (values+i),
sizeof(*values)*i);
bzero((uchar*) values, sizeof(*values)*(count-i));
break;
}
}
return (str != end);
}
longlong Item_func_period_add::val_int()
{
DBUG_ASSERT(fixed == 1);
ulong period=(ulong) args[0]->val_int();
int months=(int) args[1]->val_int();
if ((null_value=args[0]->null_value || args[1]->null_value) ||
period == 0L)
return 0; /* purecov: inspected */
return (longlong)
convert_month_to_period((uint) ((int) convert_period_to_month(period)+
months));
}
longlong Item_func_period_diff::val_int()
{
DBUG_ASSERT(fixed == 1);
ulong period1=(ulong) args[0]->val_int();
ulong period2=(ulong) args[1]->val_int();
if ((null_value=args[0]->null_value || args[1]->null_value))
return 0; /* purecov: inspected */
return (longlong) ((long) convert_period_to_month(period1)-
(long) convert_period_to_month(period2));
}
longlong Item_func_to_days::val_int()
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;
if (get_arg0_date(<ime, TIME_NO_ZERO_DATE))
return 0;
return (longlong) calc_daynr(ltime.year,ltime.month,ltime.day);
}
/*
Get information about this Item tree monotonicity
SYNOPSIS
Item_func_to_days::get_monotonicity_info()
DESCRIPTION
Get information about monotonicity of the function represented by this item
tree.
RETURN
See enum_monotonicity_info.
*/
enum_monotonicity_info Item_func_to_days::get_monotonicity_info() const
{
if (args[0]->type() == Item::FIELD_ITEM)
{
if (args[0]->field_type() == MYSQL_TYPE_DATE)
return MONOTONIC_STRICT_INCREASING;
if (args[0]->field_type() == MYSQL_TYPE_DATETIME)
return MONOTONIC_INCREASING;
}
return NON_MONOTONIC;
}
longlong Item_func_to_days::val_int_endpoint(bool left_endp, bool *incl_endp)
{
DBUG_ASSERT(fixed == 1);
MYSQL_TIME ltime;
longlong res;
if (get_arg0_date(<ime, TIME_NO_ZERO_DATE))
{
/* got NULL, leave the incl_endp intact */
return LONGLONG_MIN;
}
res=(longlong) calc_daynr(ltime.year,ltime.month,ltime.day);
if (args[0]->field_type() == MYSQL_TYPE_DATE)
{
// TO_DAYS() is strictly monotonic for dates, leave incl_endp intact
return res;
}
/*
Handle the special but practically useful case of datetime values that
point to day bound ("strictly less" comparison stays intact):
col < '2007-09-15 00:00:00' -> TO_DAYS(col) < TO_DAYS('2007-09-15')
which is different from the general case ("strictly less" changes to
"less or equal"):
col < '2007-09-15 12:34:56' -> TO_DAYS(col) <= TO_DAYS('2007-09-15')
*/
if (!left_endp && !(ltime.hour || ltime.minute || ltime.second ||