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versioning: use @@timestamp

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Don't use hidden system time in versioning,
but keep the system time logic in THD
to workaround low-res system clock and
replication not versioned to versioned.

This reverts MDEV-14788 (System versioning cannot
be based on local timestamps, as it is now).
Versioning is based on local timestamps again,
but timestamps are protected by MDEV-15923
(option to control who can set session @@timestamp).
This commit is contained in:
Sergei Golubchik
2018-05-02 21:53:12 +02:00
parent 4203f572ae
commit a4272bf154
9 changed files with 36 additions and 100 deletions
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18
mysql-test/suite/versioning/r/insert2.result
View File

@ -71,24 +71,6 @@ i c current_row
1 foo 1
drop table t1;
drop table t2;
set timestamp=1000000019;
select now() < sysdate();
now() < sysdate()
1
create table t1 (a int) with system versioning;
insert t1 values (1);
set @a=sysdate(6);
select * from t1 for system_time as of now(6);
a
select * from t1 for system_time as of sysdate(6);
a
1
update t1 set a=2;
delete from t1;
select *, row_start > @a, row_end > @a from t1 for system_time all;
a row_start > @a row_end > @a
1 0 1
2 1 1
#
# MDEV-14871 Server crashes in fill_record / fill_record_n_invoke_before_triggers upon inserting into versioned table with trigger
#