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dfdedd46e4
This patch extends the timestamp from 2038-01-19 03:14:07.999999 to 2106-02-07 06:28:15.999999 for 64 bit hardware and OS where 'long' is 64 bits. This is true for 64 bit Linux but not for Windows. This is done by treating the 32 bit stored int as unsigned instead of signed. This is safe as MariaDB has never accepted dates before the epoch (1970). The benefit of this approach that for normal timestamp the storage is compatible with earlier version. However for tables using system versioning we before stored a timestamp with the year 2038 as the 'max timestamp', which is used to detect current values. This patch stores the new 2106 year max value as the max timestamp. This means that old tables using system versioning needs to be updated with mariadb-upgrade when moving them to 11.4. That will be done in a separate commit.
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/* Copyright (c) 2004, 2006 MySQL AB
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Use is subject to license terms
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifndef _mysql_time_h_
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#define _mysql_time_h_
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/*
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Portable time_t replacement.
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For 32 bit systems holds seconds for 1970 - 2038-01-19 range
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For 64 bit systems (where long is 64 bit) holds seconds for 1970 - 2106
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Using the system built in time_t is not an option as
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we rely on the above requirements in the time functions
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*/
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typedef long my_time_t;
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/*
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Time declarations shared between the server and client API:
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you should not add anything to this header unless it's used
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(and hence should be visible) in mysql.h.
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If you're looking for a place to add new time-related declaration,
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it's most likely my_time.h. See also "C API Handling of Date
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and Time Values" chapter in documentation.
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*/
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enum enum_mysql_timestamp_type
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{
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MYSQL_TIMESTAMP_NONE= -2, MYSQL_TIMESTAMP_ERROR= -1,
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MYSQL_TIMESTAMP_DATE= 0, MYSQL_TIMESTAMP_DATETIME= 1, MYSQL_TIMESTAMP_TIME= 2
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};
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/*
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Structure which is used to represent datetime values inside MySQL.
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We assume that values in this structure are normalized, i.e. year <= 9999,
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month <= 12, day <= 31, hour <= 23, hour <= 59, hour <= 59. Many functions
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in server such as my_system_gmt_sec() or make_time() family of functions
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rely on this (actually now usage of make_*() family relies on a bit weaker
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restriction). Also functions that produce MYSQL_TIME as result ensure this.
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There is one exception to this rule though if this structure holds time
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value (time_type == MYSQL_TIMESTAMP_TIME) days and hour member can hold
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bigger values.
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*/
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typedef struct st_mysql_time
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{
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unsigned int year, month, day, hour, minute, second;
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unsigned long second_part;
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my_bool neg;
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enum enum_mysql_timestamp_type time_type;
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} MYSQL_TIME;
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#endif /* _mysql_time_h_ */
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