home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Chip 2001 January
/
Chip_2001-01_cd1.bin
/
tema
/
mysql
/
mysql-3.23.28g-win-source.exe
/
sql
/
item_timefunc.cpp
< prev
next >
Wrap
C/C++ Source or Header
|
2000-09-12
|
27KB
|
1,120 lines
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
(at your option) any later version.
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 */
/* This file defines all time functions */
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <m_ctype.h>
#include <time.h>
/*
** Todo: Move month and days to language files
*/
static String month_names[] = { "January", "February", "March", "April",
"May", "June", "July", "August",
"September", "October", "November", "December" };
static String day_names[] = { "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday" ,"Sunday" };
/*
** 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.
*/
bool get_interval_info(const char *str,uint length,uint count,
long *values)
{
const char *end=str+length;
uint i;
while (str != end && !isdigit(*str))
str++;
for (i=0 ; i < count ; i++)
{
long value;
for (value=0; str != end && isdigit(*str) ; str++)
value=value*10L + (long) (*str - '0');
values[i]= value;
while (str != end && !isdigit(*str))
str++;
if (str == end && i != count-1)
{
i++;
/* Change values[0...i-1] -> values[0...count-1] */
bmove_upp((char*) (values+count), (char*) (values+i),
sizeof(long)*i);
bzero((char*) values, sizeof(long)*(count-i));
break;
}
}
return (str != end);
}
longlong Item_func_period_add::val_int()
{
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()
{
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()
{
TIME ltime;
if (get_arg0_date(<ime,0))
return 0;
return (longlong) calc_daynr(ltime.year,ltime.month,ltime.day);
}
longlong Item_func_dayofyear::val_int()
{
TIME ltime;
if (get_arg0_date(<ime,0))
return 0;
return (longlong) calc_daynr(ltime.year,ltime.month,ltime.day) -
calc_daynr(ltime.year,1,1) + 1;
}
longlong Item_func_dayofmonth::val_int()
{
TIME ltime;
(void) get_arg0_date(<ime,1);
return (longlong) ltime.day;
}
longlong Item_func_month::val_int()
{
TIME ltime;
(void) get_arg0_date(<ime,1);
return (longlong) ltime.month;
}
String* Item_func_monthname::val_str(String* str)
{
uint month=(uint) Item_func_month::val_int();
if (!month) // This is also true for NULL
return (String*) 0;
return &month_names[month-1];
}
// Returns the quarter of the year
longlong Item_func_quarter::val_int()
{
TIME ltime;
(void) get_arg0_date(<ime,1);
return (longlong) ((ltime.month+2)/3);
}
longlong Item_func_hour::val_int()
{
TIME ltime;
(void) get_arg0_time(<ime);
return ltime.hour;
}
longlong Item_func_minute::val_int()
{
TIME ltime;
(void) get_arg0_time(<ime);
return ltime.minute;
}
// Returns the second in time_exp in the range of 0 - 59
longlong Item_func_second::val_int()
{
TIME ltime;
(void) get_arg0_time(<ime);
return ltime.second;
}
// Returns the week of year in the range of 0 - 53
longlong Item_func_week::val_int()
{
uint year;
TIME ltime;
if (get_arg0_date(<ime,0))
return 0;
return (longlong) calc_week(<ime, 0, args[1]->val_int() == 0, &year);
}
longlong Item_func_yearweek::val_int()
{
uint year,week;
TIME ltime;
if (get_arg0_date(<ime,0))
return 0;
week=calc_week(<ime, 1, args[1]->val_int() == 0, &year);
return week+year*100;
}
/* weekday() has a automatic to_days() on item */
longlong Item_func_weekday::val_int()
{
ulong tmp_value=(ulong) args[0]->val_int();
if ((null_value=(args[0]->null_value || !tmp_value)))
return 0; /* purecov: inspected */
return (longlong) calc_weekday(tmp_value,odbc_type)+test(odbc_type);
}
String* Item_func_dayname::val_str(String* str)
{
uint weekday=(uint) val_int(); // Always Item_func_daynr()
if (null_value)
return (String*) 0;
return &day_names[weekday];
}
longlong Item_func_year::val_int()
{
TIME ltime;
(void) get_arg0_date(<ime,1);
return (longlong) ltime.year;
}
longlong Item_func_unix_timestamp::val_int()
{
if (arg_count == 0)
return (longlong) current_thd->query_start();
if (args[0]->type() == FIELD_ITEM)
{ // Optimize timestamp field
Field *field=((Item_field*) args[0])->field;
if (field->type() == FIELD_TYPE_TIMESTAMP)
return ((Field_timestamp*) field)->get_timestamp();
}
String *str=args[0]->val_str(&value);
if ((null_value=args[0]->null_value))
{
return 0; /* purecov: inspected */
}
return (longlong) str_to_timestamp(str->ptr(),str->length());
}
longlong Item_func_time_to_sec::val_int()
{
TIME ltime;
(void) get_arg0_time(<ime);
return ltime.hour*3600L+ltime.minute*60+ltime.second;
}
/*
** Convert a string to a interval value
** To make code easy, allow interval objects without separators.
*/
static bool get_interval_value(Item *args,interval_type int_type,
String *str_value, INTERVAL *t)
{
long array[4],value;
const char *str;
uint32 length;
LINT_INIT(value); LINT_INIT(str); LINT_INIT(length);
bzero((char*) t,sizeof(*t));
if ((int) int_type <= INTERVAL_SECOND)
{
value=(long) args->val_int();
if (args->null_value)
return 1;
if (value < 0)
{
t->neg=1;
value= -value;
}
}
else
{
String *res;
if (!(res=args->val_str(str_value)))
return (1);
/* record negative intervalls in t->neg */
str=res->ptr();
const char *end=str+res->length();
while (str != end && isspace(*str))
str++;
if (str != end && *str == '-')
{
t->neg=1;
str++;
}
length=(uint32) (end-str); // Set up pointers to new str
}
switch (int_type) {
case INTERVAL_YEAR:
t->year=value;
break;
case INTERVAL_MONTH:
t->month=value;
break;
case INTERVAL_DAY:
t->day=value;
break;
case INTERVAL_HOUR:
t->hour=value;
break;
case INTERVAL_MINUTE:
t->minute=value;
break;
case INTERVAL_SECOND:
t->second=value;
break;
case INTERVAL_YEAR_MONTH: // Allow YEAR-MONTH YYYYYMM
if (get_interval_info(str,length,2,array))
return (1);
t->year=array[0];
t->month=array[1];
break;
case INTERVAL_DAY_HOUR:
if (get_interval_info(str,length,2,array))
return (1);
t->day=array[0];
t->hour=array[1];
break;
case INTERVAL_DAY_MINUTE:
if (get_interval_info(str,length,3,array))
return (1);
t->day=array[0];
t->hour=array[1];
t->minute=array[2];
break;
case INTERVAL_DAY_SECOND:
if (get_interval_info(str,length,4,array))
return (1);
t->day=array[0];
t->hour=array[1];
t->minute=array[2];
t->second=array[3];
break;
case INTERVAL_HOUR_MINUTE:
if (get_interval_info(str,length,2,array))
return (1);
t->hour=array[0];
t->minute=array[1];
break;
case INTERVAL_HOUR_SECOND:
if (get_interval_info(str,length,3,array))
return (1);
t->hour=array[0];
t->minute=array[1];
t->second=array[2];
break;
case INTERVAL_MINUTE_SECOND:
if (get_interval_info(str,length,2,array))
return (1);
t->minute=array[0];
t->second=array[1];
break;
}
return 0;
}
String *Item_date::val_str(String *str)
{
ulong value=(ulong) val_int();
if (null_value)
return (String*) 0;
if (!value) // zero daynr
{
str->copy("0000-00-00");
return str;
}
if (str->alloc(11))
return &empty_string; /* purecov: inspected */
sprintf((char*) str->ptr(),"%04d-%02d-%02d",
(int) (value/10000L) % 10000,
(int) (value/100)%100,
(int) (value%100));
str->length(10);
return str;
}
bool Item_date::save_in_field(Field *field)
{
TIME ltime;
timestamp_type t_type=TIMESTAMP_FULL;
if (get_date(<ime,1))
{
if (null_value)
return set_field_to_null(field);
t_type=TIMESTAMP_NONE; // Error
}
field->set_notnull();
field->store_time(<ime,t_type);
return 0;
}
longlong Item_func_from_days::val_int()
{
longlong value=args[0]->val_int();
if ((null_value=args[0]->null_value))
return 0; /* purecov: inspected */
uint year,month,day;
get_date_from_daynr((long) value,&year,&month,&day);
return (longlong) (year*10000L+month*100+day);
}
void Item_func_curdate::fix_length_and_dec()
{
struct tm tm_tmp,*start;
time_t query_start=current_thd->query_start();
decimals=0; max_length=10;
localtime_r(&query_start,&tm_tmp);
start=&tm_tmp;
value=(longlong) ((ulong) ((uint) start->tm_year+1900)*10000L+
((uint) start->tm_mon+1)*100+
(uint) start->tm_mday);
/* For getdate */
ltime.year= start->tm_year+1900;
ltime.month= start->tm_mon+1;
ltime.day= start->tm_mday;
ltime.hour= 0;
ltime.minute= 0;
ltime.second= 0;
ltime.second_part=0;
ltime.neg=0;
ltime.time_type=TIMESTAMP_DATE;
}
bool Item_func_curdate::get_date(TIME *res,
bool fuzzy_date __attribute__((unused)))
{
*res=ltime;
return 0;
}
void Item_func_curtime::fix_length_and_dec()
{
struct tm tm_tmp,*start;
time_t query_start=current_thd->query_start();
decimals=0; max_length=8;
localtime_r(&query_start,&tm_tmp);
start=&tm_tmp;
value=(longlong) ((ulong) ((uint) start->tm_hour)*10000L+
(ulong) (((uint) start->tm_min)*100L+
(uint) start->tm_sec));
sprintf(buff,"%02d:%02d:%02d",
(int) start->tm_hour,
(int) start->tm_min,
(int) start->tm_sec);
buff_length=(uint) strlen(buff);
}
void Item_func_now::fix_length_and_dec()
{
struct tm tm_tmp,*start;
time_t query_start=current_thd->query_start();
decimals=0; max_length=19;
localtime_r(&query_start,&tm_tmp);
start=&tm_tmp;
value=((longlong) ((ulong) ((uint) start->tm_year+1900)*10000L+
(((uint) start->tm_mon+1)*100+
(uint) start->tm_mday))*(longlong) 1000000L+
(longlong) ((ulong) ((uint) start->tm_hour)*10000L+
(ulong) (((uint) start->tm_min)*100L+
(uint) start->tm_sec)));
sprintf(buff,"%04d-%02d-%02d %02d:%02d:%02d",
((int) (start->tm_year+1900)) % 10000,
(int) start->tm_mon+1,
(int) start->tm_mday,
(int) start->tm_hour,
(int) start->tm_min,
(int) start->tm_sec);
buff_length=(uint) strlen(buff);
/* For getdate */
ltime.year= start->tm_year+1900;
ltime.month= start->tm_mon+1;
ltime.day= start->tm_mday;
ltime.hour= start->tm_hour;
ltime.minute= start->tm_min;
ltime.second= start->tm_sec;
ltime.second_part=0;
ltime.neg=0;
ltime.time_type=TIMESTAMP_FULL;
}
bool Item_func_now::get_date(TIME *res,
bool fuzzy_date __attribute__((unused)))
{
*res=ltime;
return 0;
}
bool Item_func_now::save_in_field(Field *to)
{
to->set_notnull();
to->store_time(<ime,TIMESTAMP_FULL);
return 0;
}
String *Item_func_sec_to_time::val_str(String *str)
{
char buff[23];
const char *sign="";
longlong seconds=(longlong) args[0]->val_int();
if ((null_value=args[0]->null_value))
return (String*) 0;
if (seconds < 0)
{
seconds= -seconds;
sign= "-";
}
uint sec= (uint) (seconds % 3600);
sprintf(buff,"%s%02lu:%02u:%02u",sign,(long) (seconds/3600),
sec/60, sec % 60);
str->copy(buff,(uint) strlen(buff));
return str;
}
longlong Item_func_sec_to_time::val_int()
{
longlong seconds=args[0]->val_int();
longlong sign=1;
if ((null_value=args[0]->null_value))
return 0;
if (seconds < 0)
{
seconds= -seconds;
sign= -1;
}
return sign*((seconds / 3600)*10000+((seconds/60) % 60)*100+ (seconds % 60));
}
void Item_func_date_format::fix_length_and_dec()
{
decimals=0;
if (args[1]->type() == STRING_ITEM)
{ // Optimize the normal case
fixed_length=1;
max_length=format_length(((Item_string*) args[1])->const_string());
}
else
{
fixed_length=0;
max_length=args[1]->max_length*10;
set_if_smaller(max_length,MAX_BLOB_WIDTH);
}
maybe_null=1; // If wrong date
}
uint Item_func_date_format::format_length(const String *format)
{
uint size=0;
const char *ptr=format->ptr();
const char *end=ptr+format->length();
for (; ptr != end ; ptr++)
{
if (*ptr != '%' || ptr == end-1)
size++;
else
{
switch(*++ptr) {
case 'M': /* month, textual */
case 'W': /* day (of the week), textual */
size += 9;
break;
case 'D': /* day (of the month), numeric plus english suffix */
case 'Y': /* year, numeric, 4 digits */
case 'x': /* Year, used with 'v' */
case 'X': /* Year, used with 'v, where week starts with Monday' */
size += 4;
break;
case 'a': /* locale's abbreviated weekday name (Sun..Sat) */
case 'b': /* locale's abbreviated month name (Jan.Dec) */
case 'j': /* day of year (001..366) */
size += 3;
break;
case 'U': /* week (00..52) */
case 'u': /* week (00..52), where week starts with Monday */
case 'V': /* week 1..53 used with 'x' */
case 'v': /* week 1..53 used with 'x', where week starts with Monday */
case 'H': /* hour (00..23) */
case 'y': /* year, numeric, 2 digits */
case 'm': /* month, numeric */
case 'd': /* day (of the month), numeric */
case 'h': /* hour (01..12) */
case 'I': /* --||-- */
case 'i': /* minutes, numeric */
case 'k': /* hour ( 0..23) */
case 'l': /* hour ( 1..12) */
case 'p': /* locale's AM or PM */
case 'S': /* second (00..61) */
case 's': /* seconds, numeric */
case 'c': /* month (0..12) */
case 'e': /* day (0..31) */
size += 2;
break;
case 'r': /* time, 12-hour (hh:mm:ss [AP]M) */
size += 11;
break;
case 'T': /* time, 24-hour (hh:mm:ss) */
size += 8;
break;
case 'w': /* day (of the week), numeric */
case '%':
default:
size++;
break;
}
}
}
return size;
}
String *Item_func_date_format::val_str(String *str)
{
String *format;
TIME l_time;
char intbuff[15];
uint size,weekday;
if (!date_or_time)
{
if (get_arg0_date(&l_time,1))
return 0;
}
else
{
String *res;
if (!(res=args[0]->val_str(str)))
{
null_value=1;
return 0;
}
if (str_to_time(res->ptr(),res->length(),&l_time))
{
null_value=1;
return 0;
}
l_time.year=l_time.month=l_time.day=0;
null_value=0;
}
if (!(format = args[1]->val_str(str)) || !format->length())
{
null_value=1;
return 0;
}
if (fixed_length)
size=max_length;
else
size=format_length(format);
if (format == str)
str=&str_value; // Save result here
if (str->alloc(size))
{
null_value=1;
return 0;
}
str->length(0);
/* Create the result string */
const char *ptr=format->ptr();
const char *end=ptr+format->length();
for ( ; ptr != end ; ptr++)
{
if (*ptr != '%' || ptr+1 == end)
str->append(*ptr);
else
{
switch (*++ptr) {
case 'M':
if(!l_time.month)
{
null_value=1;
return 0;
}
str->append(month_names[l_time.month-1]);
break;
case 'b':
if(!l_time.month)
{
null_value=1;
return 0;
}
str->append(month_names[l_time.month-1].ptr(),3);
break;
case 'W':
if(date_or_time)
{
null_value=1;
return 0;
}
weekday=calc_weekday(calc_daynr(l_time.year,l_time.month,l_time.day),0);
str->append(day_names[weekday]);
break;
case 'a':
if(date_or_time)
{
null_value=1;
return 0;
}
weekday=calc_weekday(calc_daynr(l_time.year,l_time.month,l_time.day),0);
str->append(day_names[weekday].ptr(),3);
break;
case 'D':
if(date_or_time)
{
null_value=1;
return 0;
}
sprintf(intbuff,"%d",l_time.day);
str->append(intbuff);
if (l_time.day >= 10 && l_time.day <= 19)
str->append("th");
else
{
switch (l_time.day %10)
{
case 1:
str->append("st");
break;
case 2:
str->append("nd");
break;
case 3:
str->append("rd");
break;
default:
str->append("th");
break;
}
}
break;
case 'Y':
sprintf(intbuff,"%04d",l_time.year);
str->append(intbuff);
break;
case 'y':
sprintf(intbuff,"%02d",l_time.year%100);
str->append(intbuff);
break;
case 'm':
sprintf(intbuff,"%02d",l_time.month);
str->append(intbuff);
break;
case 'c':
sprintf(intbuff,"%d",l_time.month);
str->append(intbuff);
break;
case 'd':
sprintf(intbuff,"%02d",l_time.day);
str->append(intbuff);
break;
case 'e':
sprintf(intbuff,"%d",l_time.day);
str->append(intbuff);
break;
case 'H':
sprintf(intbuff,"%02d",l_time.hour);
str->append(intbuff);
break;
case 'h':
case 'I':
sprintf(intbuff,"%02d", (l_time.hour+11)%12+1);
str->append(intbuff);
break;
case 'i': /* minutes */
sprintf(intbuff,"%02d",l_time.minute);
str->append(intbuff);
break;
case 'j':
if(date_or_time)
{
null_value=1;
return 0;
}
sprintf(intbuff,"%03d",
(int) (calc_daynr(l_time.year,l_time.month,l_time.day) -
calc_daynr(l_time.year,1,1)) + 1);
str->append(intbuff);
break;
case 'k':
sprintf(intbuff,"%d",l_time.hour);
str->append(intbuff);
break;
case 'l':
sprintf(intbuff,"%d", (l_time.hour+11)%12+1);
str->append(intbuff);
break;
case 'p':
str->append(l_time.hour < 12 ? "AM" : "PM");
break;
case 'r':
sprintf(intbuff,(l_time.hour < 12) ? "%02d:%02d:%02d AM" :
"%02d:%02d:%02d PM",(l_time.hour+11)%12+1,l_time.minute,
l_time.second);
str->append(intbuff);
break;
case 'S':
case 's':
sprintf(intbuff,"%02d",l_time.second);
str->append(intbuff);
break;
case 'T':
sprintf(intbuff,"%02d:%02d:%02d",l_time.hour,l_time.minute,l_time.second);
str->append(intbuff);
break;
case 'U':
case 'u':
{
uint year;
sprintf(intbuff,"%02d",calc_week(&l_time, 0, (*ptr) == 'U', &year));
str->append(intbuff);
}
break;
case 'v':
case 'V':
{
uint year;
sprintf(intbuff,"%02d",calc_week(&l_time, 1, (*ptr) == 'V', &year));
str->append(intbuff);
}
break;
case 'x':
case 'X':
{
uint year;
(void) calc_week(&l_time, 1, (*ptr) == 'X', &year);
sprintf(intbuff,"%04d",year);
str->append(intbuff);
}
break;
case 'w':
weekday=calc_weekday(calc_daynr(l_time.year,l_time.month,l_time.day),1);
sprintf(intbuff,"%01d",weekday);
str->append(intbuff);
break;
default:
str->append(*ptr);
break;
}
}
}
return str;
}
String *Item_func_from_unixtime::val_str(String *str)
{
struct tm tm_tmp,*start;
time_t tmp=(time_t) args[0]->val_int();
if ((null_value=args[0]->null_value))
return 0;
localtime_r(&tmp,&tm_tmp);
start=&tm_tmp;
if (str->alloc(20))
return str; /* purecov: inspected */
sprintf((char*) str->ptr(),"%04d-%02d-%02d %02d:%02d:%02d",
(int) start->tm_year+1900,
(int) start->tm_mon+1,
(int) start->tm_mday,
(int) start->tm_hour,
(int) start->tm_min,
(int) start->tm_sec);
str->length(19);
return str;
}
longlong Item_func_from_unixtime::val_int()
{
time_t tmp=(time_t) (ulong) args[0]->val_int();
if ((null_value=args[0]->null_value))
return 0;
struct tm tm_tmp,*start;
localtime_r(&tmp,&tm_tmp);
start= &tm_tmp;
return ((longlong) ((ulong) ((uint) start->tm_year+1900)*10000L+
(((uint) start->tm_mon+1)*100+
(uint) start->tm_mday))*LL(1000000)+
(longlong) ((ulong) ((uint) start->tm_hour)*10000L+
(ulong) (((uint) start->tm_min)*100L+
(uint) start->tm_sec)));
}
bool Item_func_from_unixtime::get_date(TIME *ltime,
bool fuzzy_date __attribute__((unused)))
{
time_t tmp=(time_t) (ulong) args[0]->val_int();
if ((null_value=args[0]->null_value))
return 1;
struct tm tm_tmp,*start;
localtime_r(&tmp,&tm_tmp);
start= &tm_tmp;
ltime->year= start->tm_year+1900;
ltime->month= start->tm_mon+1;
ltime->day= start->tm_mday;
ltime->hour= start->tm_hour;
ltime->minute=start->tm_min;
ltime->second=start->tm_sec;
ltime->second_part=0;
ltime->neg=0;
return 0;
}
/* Here arg[1] is a Item_interval object */
bool Item_date_add_interval::get_date(TIME *ltime, bool fuzzy_date)
{
long period,sign;
INTERVAL interval;
if (args[0]->get_date(ltime,0) ||
get_interval_value(args[1],int_type,&value,&interval))
goto null_date;
sign= (interval.neg ? -1 : 1);
if (date_sub_interval)
sign = -sign;
null_value=0;
switch (int_type) {
case INTERVAL_SECOND:
case INTERVAL_MINUTE:
case INTERVAL_HOUR:
case INTERVAL_MINUTE_SECOND:
case INTERVAL_HOUR_SECOND:
case INTERVAL_HOUR_MINUTE:
case INTERVAL_DAY_SECOND:
case INTERVAL_DAY_MINUTE:
case INTERVAL_DAY_HOUR:
long sec,days,daynr;
ltime->time_type=TIMESTAMP_FULL; // Return full date
sec=((ltime->day-1)*3600*24L+ltime->hour*3600+ltime->minute*60+
ltime->second +
sign*(interval.day*3600*24L +
interval.hour*3600+interval.minute*60+interval.second));
days=sec/(3600*24L); sec=sec-days*3600*24L;
if (sec < 0)
{
days--;
sec+=3600*24L;
}
ltime->second=sec % 60;
ltime->minute=sec/60 % 60;
ltime->hour=sec/3600;
daynr= calc_daynr(ltime->year,ltime->month,1) + days;
get_date_from_daynr(daynr,<ime->year,<ime->month,<ime->day);
if (daynr < 0 || daynr >= 3652424) // Day number from year 0 to 9999-12-31
goto null_date;
break;
case INTERVAL_DAY:
period= calc_daynr(ltime->year,ltime->month,ltime->day) +
sign*interval.day;
if (period < 0 || period >= 3652424) // Daynumber from year 0 to 9999-12-31
goto null_date;
get_date_from_daynr((long) period,<ime->year,<ime->month,<ime->day);
break;
case INTERVAL_YEAR:
ltime->year += sign*interval.year;
if ((int) ltime->year < 0 || ltime->year >= 10000L)
goto null_date;
if (ltime->month == 2 && ltime->day == 29 &&
calc_days_in_year(ltime->year) != 366)
ltime->day=28; // Was leap-year
break;
case INTERVAL_YEAR_MONTH:
case INTERVAL_MONTH:
period= (ltime->year*12 + sign*interval.year*12 +
ltime->month-1 + sign*interval.month);
if (period < 0 || period >= 120000L)
goto null_date;
ltime->year= (uint) (period / 12);
ltime->month= (uint) (period % 12L)+1;
/* Adjust day if the new month doesn't have enough days */
if (ltime->day > days_in_month[ltime->month-1])
{
ltime->day = days_in_month[ltime->month-1];
if (ltime->month == 2 && calc_days_in_year(ltime->year) == 366)
ltime->day++; // Leap-year
}
break;
default:
goto null_date;
}
return 0; // Ok
null_date:
return (null_value=1);
}
String *Item_date_add_interval::val_str(String *str)
{
TIME ltime;
if (Item_date_add_interval::get_date(<ime,0))
return 0;
if (ltime.time_type == TIMESTAMP_DATE)
{
if (str->alloc(11))
goto null_date;
sprintf((char*) str->ptr(),"%04d-%02d-%02d",
ltime.year,ltime.month,ltime.day);
str->length(10);
}
else
{
if (str->alloc(20))
goto null_date;
sprintf((char*) str->ptr(),"%04d-%02d-%02d %02d:%02d:%02d",
ltime.year,ltime.month,ltime.day,
ltime.hour,ltime.minute,ltime.second);
str->length(19);
}
return str;
null_date:
null_value=1;
return 0;
}
longlong Item_date_add_interval::val_int()
{
TIME ltime;
if (Item_date_add_interval::get_date(<ime,0))
return (longlong) 0;
return ((longlong) (((ulong) ltime.year)*10000L+
(((uint) ltime.month)*100+
(uint) ltime.day))*(longlong) 1000000L+
(longlong) ((ulong) ((uint) ltime.hour)*10000L+
(ulong) (((uint)ltime.minute)*100L+
(uint) ltime.second)));
}
void Item_extract::fix_length_and_dec()
{
value.alloc(32); // alloc buffer
maybe_null=1; // If wrong date
switch (int_type) {
case INTERVAL_YEAR: max_length=4; date_value=1; break;
case INTERVAL_YEAR_MONTH: max_length=6; date_value=1; break;
case INTERVAL_MONTH: max_length=2; date_value=1; break;
case INTERVAL_DAY: max_length=2; date_value=1; break;
case INTERVAL_DAY_HOUR: max_length=9; date_value=0; break;
case INTERVAL_DAY_MINUTE: max_length=11; date_value=0; break;
case INTERVAL_DAY_SECOND: max_length=13; date_value=0; break;
case INTERVAL_HOUR: max_length=2; date_value=0; break;
case INTERVAL_HOUR_MINUTE: max_length=4; date_value=0; break;
case INTERVAL_HOUR_SECOND: max_length=6; date_value=0; break;
case INTERVAL_MINUTE: max_length=2; date_value=0; break;
case INTERVAL_MINUTE_SECOND: max_length=4; date_value=0; break;
case INTERVAL_SECOND: max_length=2; date_value=0; break;
}
}
longlong Item_extract::val_int()
{
TIME ltime;
long neg;
if (date_value)
{
if (get_arg0_date(<ime,1))
return 0;
neg=1;
}
else
{
String *res= args[0]->val_str(&value);
if (!res || str_to_time(res->ptr(),res->length(),<ime))
{
null_value=1;
return 0;
}
neg= ltime.neg ? -1 : 1;
null_value=0;
}
switch (int_type) {
case INTERVAL_YEAR: return ltime.year;
case INTERVAL_YEAR_MONTH: return ltime.year*100L+ltime.month;
case INTERVAL_MONTH: return ltime.month;
case INTERVAL_DAY: return ltime.day;
case INTERVAL_DAY_HOUR: return (long) (ltime.day*100L+ltime.hour)*neg;
case INTERVAL_DAY_MINUTE: return (long) (ltime.day*10000L+
ltime.hour*100L+
ltime.minute)*neg;
case INTERVAL_DAY_SECOND: return ((longlong) ltime.day*1000000L+
(longlong) (ltime.hour*10000L+
ltime.minute*100+
ltime.second))*neg;
case INTERVAL_HOUR: return (long) ltime.hour*neg;
case INTERVAL_HOUR_MINUTE: return (long) (ltime.hour*100+ltime.minute)*neg;
case INTERVAL_HOUR_SECOND: return (long) (ltime.hour*10000+ltime.minute*100+
ltime.second)*neg;
case INTERVAL_MINUTE: return (long) ltime.minute*neg;
case INTERVAL_MINUTE_SECOND: return (long) (ltime.minute*100+ltime.second)*neg;
case INTERVAL_SECOND: return (long) ltime.second*neg;
}
return 0; // Impossible
}