1
0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00

Bug#35848: UUID() returns UUIDs with the wrong time

offset for time part in UUIDs was 1/1000 of what it
should be. In other words, offset was off.

Also handle the case where we count into the future
when several UUIDs are generated in one "tick", and
then the next call is late enough for us to unwind
some but not all of those borrowed ticks.

Lastly, handle the case where we keep borrowing and
borrowing until the tick-counter overflows by also
changing into a new "numberspace" by creating a new
random suffix.
This commit is contained in:
Tatiana A. Nurnberg
2008-07-10 03:58:30 +02:00
parent a129837f66
commit 2d41201c8a
3 changed files with 86 additions and 12 deletions

View File

@ -305,4 +305,18 @@ drop table t1;
SELECT NAME_CONST('var', 'value') COLLATE latin1_general_cs;
NAME_CONST('var', 'value') COLLATE latin1_general_cs
value
select @@session.time_zone into @save_tz;
set @@session.time_zone='UTC';
select uuid() into @my_uuid;
select mid(@my_uuid,15,1);
mid(@my_uuid,15,1)
1
select 24 * 60 * 60 * 1000 * 1000 * 10 into @my_uuid_one_day;
select concat('0',mid(@my_uuid,16,3),mid(@my_uuid,10,4),left(@my_uuid,8)) into @my_uuidate;
select floor(conv(@my_uuidate,16,10)/@my_uuid_one_day) into @my_uuid_date;
select 141427 + datediff(curdate(),'1970-01-01') into @my_uuid_synthetic;
select @my_uuid_date - @my_uuid_synthetic;
@my_uuid_date - @my_uuid_synthetic
0
set @@session.time_zone=@save_tz;
End of 5.0 tests