Current File : //usr/include/mysql/server/private/sql_time.h
/* Copyright (c) 2006, 2010, Oracle and/or its affiliates.
Copyright (c) 2011, 2020, MariaDB
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#ifndef SQL_TIME_INCLUDED
#define SQL_TIME_INCLUDED
#include "my_time.h"
#include "mysql_time.h" /* timestamp_type */
#include "sql_error.h" /* Sql_condition */
#include "structs.h" /* INTERVAL */
typedef enum enum_mysql_timestamp_type timestamp_type;
typedef struct st_date_time_format DATE_TIME_FORMAT;
typedef struct st_known_date_time_format KNOWN_DATE_TIME_FORMAT;
/* Flags for calc_week() function. */
#define WEEK_MONDAY_FIRST 1
#define WEEK_YEAR 2
#define WEEK_FIRST_WEEKDAY 4
ulong convert_period_to_month(ulong period);
ulong convert_month_to_period(ulong month);
void set_current_date(THD *thd, MYSQL_TIME *to);
bool time_to_datetime(MYSQL_TIME *ltime);
void time_to_daytime_interval(MYSQL_TIME *l_time);
bool get_date_from_daynr(long daynr,uint *year, uint *month, uint *day);
my_time_t TIME_to_timestamp(THD *thd, const MYSQL_TIME *t, uint *error_code);
bool str_to_datetime_with_warn(CHARSET_INFO *cs, const char *str, size_t length, MYSQL_TIME *l_time,
ulonglong flags);
bool double_to_datetime_with_warn(double value, MYSQL_TIME *ltime,
ulonglong fuzzydate,
const TABLE_SHARE *s, const char *name);
bool decimal_to_datetime_with_warn(const my_decimal *value, MYSQL_TIME *ltime,
ulonglong fuzzydate,
const TABLE_SHARE *s, const char *name);
bool int_to_datetime_with_warn(bool neg, ulonglong value, MYSQL_TIME *ltime,
ulonglong fuzzydate,
const TABLE_SHARE *s, const char *name);
bool time_to_datetime(THD *thd, const MYSQL_TIME *tm, MYSQL_TIME *dt);
bool time_to_datetime_with_warn(THD *thd,
const MYSQL_TIME *tm, MYSQL_TIME *dt,
ulonglong fuzzydate);
/*
Simply truncate the YYYY-MM-DD part to 0000-00-00
and change time_type to MYSQL_TIMESTAMP_TIME
*/
inline void datetime_to_time(MYSQL_TIME *ltime)
{
DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
DBUG_ASSERT(ltime->neg == 0);
ltime->year= ltime->month= ltime->day= 0;
ltime->time_type= MYSQL_TIMESTAMP_TIME;
}
/**
Convert DATE/DATETIME to TIME(dec)
using CURRENT_DATE in a non-old mode,
or using simple truncation in old mode (OLD_MODE_ZERO_DATE_TIME_CAST).
@param thd - the thread to get the variables.old_behaviour value from
@param dt - the DATE of DATETIME value to convert
@param[out] tm - store result here
@param dec - the desired scale. The fractional part of the result
is checked according to this parameter before returning
the conversion result. "dec" is important in the corner
cases near the max/min limits.
If the result is '838:59:59.999999' and the desired scale
is less than 6, an error is returned.
Note, dec is not important in the
OLD_MODE_ZERO_DATE_TIME_CAST old mode.
- in case of OLD_MODE_ZERO_DATE_TIME_CAST
the TIME part is simply truncated and "false" is returned.
- otherwise, the result is calculated effectively similar to:
TIMEDIFF(dt, CAST(CURRENT_DATE AS DATETIME))
If the difference fits into the supported TIME range, "false" is returned,
otherwise a warning is issued and "true" is returned.
@return false - on success
@return true - on error
*/
bool datetime_to_time_with_warn(THD *, const MYSQL_TIME *dt,
MYSQL_TIME *tm, uint dec);
inline void datetime_to_date(MYSQL_TIME *ltime)
{
DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
DBUG_ASSERT(ltime->neg == 0);
ltime->second_part= ltime->hour= ltime->minute= ltime->second= 0;
ltime->time_type= MYSQL_TIMESTAMP_DATE;
}
inline void date_to_datetime(MYSQL_TIME *ltime)
{
DBUG_ASSERT(ltime->time_type == MYSQL_TIMESTAMP_DATE ||
ltime->time_type == MYSQL_TIMESTAMP_DATETIME);
DBUG_ASSERT(ltime->neg == 0);
ltime->time_type= MYSQL_TIMESTAMP_DATETIME;
}
void make_truncated_value_warning(THD *thd,
Sql_condition::enum_warning_level level,
const ErrConv *str_val,
timestamp_type time_type,
const char *db_name, const char *table_name,
const char *field_name);
static inline void make_truncated_value_warning(THD *thd,
Sql_condition::enum_warning_level level, const char *str_val,
size_t str_length, timestamp_type time_type,
const char *db_name, const char *table_name,
const char *field_name)
{
const ErrConvString str(str_val, str_length, &my_charset_bin);
make_truncated_value_warning(thd, level, &str, time_type, db_name, table_name,
field_name);
}
extern DATE_TIME_FORMAT *date_time_format_make(timestamp_type format_type,
const char *format_str,
uint format_length);
extern DATE_TIME_FORMAT *date_time_format_copy(THD *thd,
DATE_TIME_FORMAT *format);
const char *get_date_time_format_str(KNOWN_DATE_TIME_FORMAT *format,
timestamp_type type);
bool my_TIME_to_str(const MYSQL_TIME *ltime, String *str, uint dec);
/* MYSQL_TIME operations */
bool date_add_interval(MYSQL_TIME *ltime, interval_type int_type,
const INTERVAL &interval);
bool calc_time_diff(const MYSQL_TIME *l_time1, const MYSQL_TIME *l_time2,
int l_sign, longlong *seconds_out, long *microseconds_out);
int append_interval(String *str, interval_type int_type,
const INTERVAL &interval);
/**
Calculate time difference between two MYSQL_TIME values and
store the result as an out MYSQL_TIME value in MYSQL_TIMESTAMP_TIME format.
The result can be outside of the supported TIME range.
For example, calc_time_diff('2002-01-01 00:00:00', '2001-01-01 00:00:00')
returns '8760:00:00'. So the caller might want to do check_time_range() or
adjust_time_range_with_warn() on the result of a calc_time_diff() call.
@param l_time1 - the minuend (TIME/DATE/DATETIME value)
@param l_time2 - the subtrahend TIME/DATE/DATETIME value
@param l_sign - +1 if absolute values are to be subtracted,
or -1 if absolute values are to be added.
@param[out] l_time3 - the result
@param fuzzydate - flags
@return true - if TIME_NO_ZERO_DATE was passed in flags and
the result appeared to be '00:00:00.000000'.
This is important when calc_time_diff() is called
when calculating DATE_ADD(TIMEDIFF(...),...)
@return false - otherwise
*/
bool calc_time_diff(const MYSQL_TIME *l_time1, const MYSQL_TIME *l_time2,
int lsign, MYSQL_TIME *l_time3, ulonglong fuzzydate);
int my_time_compare(const MYSQL_TIME *a, const MYSQL_TIME *b);
void localtime_to_TIME(MYSQL_TIME *to, struct tm *from);
void calc_time_from_sec(MYSQL_TIME *to, long seconds, long microseconds);
uint calc_week(MYSQL_TIME *l_time, uint week_behaviour, uint *year);
int calc_weekday(long daynr,bool sunday_first_day_of_week);
bool parse_date_time_format(timestamp_type format_type,
const char *format, uint format_length,
DATE_TIME_FORMAT *date_time_format);
/* Character set-aware version of str_to_time() */
bool str_to_time(CHARSET_INFO *cs, const char *str,size_t length,
MYSQL_TIME *l_time, ulonglong fuzzydate,
MYSQL_TIME_STATUS *status);
/* Character set-aware version of str_to_datetime() */
bool str_to_datetime(CHARSET_INFO *cs,
const char *str, size_t length,
MYSQL_TIME *l_time, ulonglong flags,
MYSQL_TIME_STATUS *status);
/* convenience wrapper */
inline bool parse_date_time_format(timestamp_type format_type,
DATE_TIME_FORMAT *date_time_format)
{
return parse_date_time_format(format_type,
date_time_format->format.str,
(uint) date_time_format->format.length,
date_time_format);
}
extern DATE_TIME_FORMAT global_date_format;
extern DATE_TIME_FORMAT global_datetime_format;
extern DATE_TIME_FORMAT global_time_format;
extern KNOWN_DATE_TIME_FORMAT known_date_time_formats[];
extern LEX_CSTRING interval_type_to_name[];
static inline bool
non_zero_hhmmssuu(const MYSQL_TIME *ltime)
{
return ltime->hour || ltime->minute || ltime->second || ltime->second_part;
}
static inline bool
non_zero_YYMMDD(const MYSQL_TIME *ltime)
{
return ltime->year || ltime->month || ltime->day;
}
static inline bool
non_zero_date(const MYSQL_TIME *ltime)
{
return non_zero_YYMMDD(ltime) ||
(ltime->time_type == MYSQL_TIMESTAMP_DATETIME &&
non_zero_hhmmssuu(ltime));
}
static inline bool
check_date(const MYSQL_TIME *ltime, ulonglong flags, int *was_cut)
{
return check_date(ltime, non_zero_date(ltime), flags, was_cut);
}
bool check_date_with_warn(const MYSQL_TIME *ltime, ulonglong fuzzy_date,
timestamp_type ts_type);
bool make_date_with_warn(MYSQL_TIME *ltime,
ulonglong fuzzy_date, timestamp_type ts_type);
bool adjust_time_range_with_warn(MYSQL_TIME *ltime, uint dec);
longlong pack_time(const MYSQL_TIME *my_time);
void unpack_time(longlong packed, MYSQL_TIME *my_time,
enum_mysql_timestamp_type ts_type);
#endif /* SQL_TIME_INCLUDED */
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