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MDEV-32188 make TIMESTAMP use whole 32-bit unsigned range

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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.
This commit is contained in:
Monty
2023-09-11 17:58:22 +03:00
committed by Sergei Golubchik
parent ce6cce85d4
commit dfdedd46e4
90 changed files with 1227 additions and 354 deletions
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6
mysql-test/suite/versioning/r/select.result
View File

@@ -265,6 +265,7 @@ drop view vt1;
create or replace table t1(x int) with system versioning;
select * from (t1 as r left join t1 as u using (x)), t1;
x x
set @@time_zone="+00:00";
create or replace table t1 (a int) with system versioning;
insert into t1 values (1);
create trigger read_end after update on t1
@@ -273,6 +274,7 @@ update t1 set a=2;
select @end;
@end
MAX_RESULT
set @@time_zone=default;
create or replace table t1 (a int) with system versioning;
create or replace table t2 (b int) with system versioning;
insert into t1 values (1);
@@ -329,7 +331,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t1` `t2` left join `test`.`t1` `t3` on(`test`.`t3`.`a` = `test`.`t2`.`a` and `test`.`t3`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999')) on(`test`.`t2`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999' and `test`.`t1`.`a` > 1) where `test`.`t1`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a` from `test`.`t1` left join (`test`.`t1` `t2` left join `test`.`t1` `t3` on(`test`.`t3`.`a` = `test`.`t2`.`a` and `test`.`t3`.`row_end` = SYS_TIME_MAX)) on(`test`.`t2`.`row_end` = SYS_TIME_MAX and `test`.`t1`.`a` > 1) where `test`.`t1`.`row_end` = SYS_TIME_MAX
select * from t1 left outer join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1;
a a
2 1
@@ -558,7 +560,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` left join `test`.`t4` on(`test`.`t4`.`f4` = `test`.`t2`.`f2` and `test`.`t4`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999')) on(`test`.`t3`.`f3` = `test`.`t2`.`f2`) where `test`.`t1`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
Note 1003 select `test`.`t1`.`f1` AS `f1` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` left join `test`.`t4` on(`test`.`t4`.`f4` = `test`.`t2`.`f2` and `test`.`t4`.`row_end` = SYS_TIME_MAX)) on(`test`.`t3`.`f3` = `test`.`t2`.`f2`) where `test`.`t1`.`row_end` = SYS_TIME_MAX
drop view v1;
drop table t1, t2, t3, t4;
#