mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
09ba29e539
Added basic per-thread time zone functionality (based on public domain elsie-code). Now user can select current time zone (from the list of time zones described in system tables). All NOW-like functions honor this time zone, values of TIMESTAMP type are interpreted as values in this time zone, so now our TIMESTAMP type behaves similar to Oracle's TIMESTAMP WITH LOCAL TIME ZONE (or proper PostgresSQL type). WL#1266 "CONVERT_TZ() - basic time with time zone conversion function". Fixed problems described in Bug #2336 (Different number of warnings when inserting bad datetime as string or as number). This required reworking of datetime realted warning hadling (they now generated at Field object level not in conversion functions). Optimization: Now Field class descendants use table->in_use member instead of current_thd macro.
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/* Copyright (C) 2004 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; 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 */
|
|
|
|
|
|
#ifdef __GNUC__
|
|
#pragma interface /* gcc class interface */
|
|
#endif
|
|
|
|
#if !defined(TESTTIME) && !defined(TZINFO2SQL)
|
|
/*
|
|
This class represents abstract time zone and provides
|
|
basic interface for TIME <-> my_time_t conversion.
|
|
Actual time zones which are specified by DB, or via offset
|
|
or use system functions are its descendants.
|
|
*/
|
|
class Time_zone: public Sql_alloc
|
|
{
|
|
public:
|
|
/*
|
|
Converts local time in broken down TIME representation to
|
|
my_time_t (UTC seconds since Epoch) represenation.
|
|
Returns 0 in case of error. Sets in_dst_time_gap to true if date provided
|
|
falls into spring time-gap (or lefts it untouched otherwise).
|
|
*/
|
|
virtual my_time_t TIME_to_gmt_sec(const TIME *t,
|
|
bool *in_dst_time_gap) const = 0;
|
|
/*
|
|
Converts time in my_time_t representation to local time in
|
|
broken down TIME representation.
|
|
*/
|
|
virtual void gmt_sec_to_TIME(TIME *tmp, my_time_t t) const = 0;
|
|
/*
|
|
Because of constness of String returned by get_name() time zone name
|
|
have to be already zeroended to be able to use String::ptr() instead
|
|
of c_ptr().
|
|
*/
|
|
virtual const String * get_name() const = 0;
|
|
|
|
/*
|
|
We need this only for surpressing warnings, objects of this type are
|
|
allocated on MEM_ROOT and should not require destruction.
|
|
*/
|
|
virtual ~Time_zone() {};
|
|
};
|
|
|
|
extern Time_zone * my_tz_UTC;
|
|
extern Time_zone * my_tz_SYSTEM;
|
|
extern Time_zone * my_tz_find(THD *thd, const String *name);
|
|
extern my_bool my_tz_init(THD *org_thd, const char *default_tzname, my_bool bootstrap);
|
|
extern void my_tz_free();
|
|
|
|
/*
|
|
Maximum length of time zone name that we support
|
|
(Time zone name is char(64) in db)
|
|
*/
|
|
#define MAX_TIME_ZONE_NAME_LENGTH 72
|
|
|
|
#endif /* !defined(TESTTIME) && !defined(TZINFO2SQL) */
|