create table t (a int) with system versioning;
set @before= UNIX_TIMESTAMP(now(6));
insert into t values (1);
set @after= UNIX_TIMESTAMP(now(6));
update t set a= 2;

show global variables like 'system_versioning_asof';
show variables like 'system_versioning_asof';
select * from t;

set system_versioning_asof= '2031-1-1 0:0:0';
show variables like 'system_versioning_asof';
select * from t;

set system_versioning_asof= '2011-1-1 0:0:0';
show variables like 'system_versioning_asof';
select * from t;

# global
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= 'alley';
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= null;
--error ER_WRONG_TYPE_FOR_VAR
set global system_versioning_asof= 1;
--error ER_WRONG_TYPE_FOR_VAR
set global system_versioning_asof= 1.1;
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= '2011-02-29 00:00';
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= '2011-02-28 24:00';
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= '2011-00-28 00:00';
--error ER_WRONG_VALUE_FOR_VAR
set global system_versioning_asof= '0000-00-00 00:00';

# session
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= 'alley';
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= null;
--error ER_WRONG_TYPE_FOR_VAR
set system_versioning_asof= 1;
--error ER_WRONG_TYPE_FOR_VAR
set system_versioning_asof= 1.1;
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= '2011-02-29 00:00';
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= '2011-02-28 24:00';
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= '2011-00-28 00:00';
--error ER_WRONG_VALUE_FOR_VAR
set system_versioning_asof= '0000-00-00 00:00';

--echo # GLOBAL @@system_versioning_asof
set global system_versioning_asof= '1991-11-11 11:11:11.1111119';
show global variables like 'system_versioning_asof';

set global system_versioning_asof= '1990-01-01 00:00:00';
show global variables like 'system_versioning_asof';

--enable_prepare_warnings
set global system_versioning_asof= timestamp'1991-11-11 11:11:11.1111119';
--disable_prepare_warnings
show global variables like 'system_versioning_asof';

set @ts= timestamp'1990-01-01 00:00:00';
set global system_versioning_asof= @ts;
show global variables like 'system_versioning_asof';

set global system_versioning_asof= default;
select @@global.system_versioning_asof;

--echo # SESSION @@system_versioning_asof
set system_versioning_asof= '1991-11-11 11:11:11.1111119';
show variables like 'system_versioning_asof';

set system_versioning_asof= '1990-01-01 00:00:00';
show variables like 'system_versioning_asof';

--enable_prepare_warnings
set system_versioning_asof= timestamp'1991-11-11 11:11:11.1111119';
--disable_prepare_warnings
show variables like 'system_versioning_asof';

set @ts= timestamp'1990-01-01 00:00:00';
set system_versioning_asof= @ts;
show variables like 'system_versioning_asof';

--echo # DEFAULT: value is copied from GLOBAL to SESSION
set global time_zone= "+03:00";
set time_zone= "+10:00";
set global system_versioning_asof= timestamp'1991-11-11 11:11:11.111111';
set system_versioning_asof= '1990-01-01 00:00:00';
select @@global.system_versioning_asof != @@system_versioning_asof as different;
set system_versioning_asof= default;
select @@global.system_versioning_asof != @@system_versioning_asof as different;
set global system_versioning_asof= default;
select @@global.system_versioning_asof = @@system_versioning_asof as equal;

set global time_zone= DEFAULT;
set time_zone= DEFAULT;
set global system_versioning_asof= DEFAULT;
set system_versioning_asof= DEFAULT;
select @@global.system_versioning_asof, @@system_versioning_asof;

select * from t for system_time all;

select * from t;
select * from t for system_time as of timestamp current_timestamp(6);
select * from t for system_time all;
select * from t for system_time from '1970-01-01 00:00' to current_timestamp(6);
select * from t for system_time between '1970-01-01 00:00' and current_timestamp(6);

-- echo # MDEV-16026: Global system_versioning_asof must not be used if client sessions can have non-default time zone
-- echo # changing time zone should not abuse `system_versioning_asof`

set session time_zone = '+10:00';
set global system_versioning_asof = '1999-09-08 00:00:00.000000';
show global variables like 'system_versioning_asof';
set session time_zone = '+03:00';
show global variables like 'system_versioning_asof';

set session time_zone = '+03:00';
set session system_versioning_asof = '2000-09-08 00:00:00.000000';
show session variables like 'system_versioning_asof';
set session time_zone = '+10:00';
show session variables like 'system_versioning_asof';
-- echo # global and local time zones should not interfere
show global variables like 'system_versioning_asof';

set time_zone= "+10:00";
set system_versioning_asof= FROM_UNIXTIME(@before);
select * from t as empty;
set system_versioning_asof= FROM_UNIXTIME(@after);
select * from t as nonempty;

set time_zone= "+03:00";
set system_versioning_asof= FROM_UNIXTIME(@before);
select * from t as empty;
set system_versioning_asof= FROM_UNIXTIME(@after);
select * from t as nonempty;

--echo # MDEV-16481: set global system_versioning_asof=sf() crashes in specific case
--echo # Using global variable inside a stored function should not crash
create or replace function now_global() returns timestamp
  return  CONVERT_TZ(now(), @@session.time_zone, @@global.time_zone);
set global system_versioning_asof= now_global();
drop function now_global;

set global time_zone= "SYSTEM";
set time_zone= "SYSTEM";
set global system_versioning_asof= default;
set system_versioning_asof= default;

show status like "Feature_system_versioning";

drop table t;

--echo #
--echo # MDEV-22906 Disallow system_versioning_asof in DML
--echo #
create or replace table t1 (x int) with system versioning;
create or replace table t2 (y int);
insert into t1 values (1);
insert into t2 values (1);
set system_versioning_asof= '1970-01-02 00:00:00';
delete t1, t2 from t1 join t2 where t1.x = t2.y;
select * from t1 for system_time as of timestamp now(6);

insert into t1 values (1);
insert into t2 values (1);
update t1, t2 set x= 2, y= 2 where x = y;
select * from t1 for system_time as of timestamp now(6);

replace t2 select x + 1 from t1;
select * from t2;

insert t2 select x + 2 from t1;
select * from t2;

drop tables t1, t2;


--echo #
--echo # MDEV-16991 Rounding vs truncation for TIME, DATETIME, TIMESTAMP
--echo #

SET sql_mode=TIME_ROUND_FRACTIONAL;
--enable_prepare_warnings
SET @@global.system_versioning_asof= timestamp'2001-12-31 23:59:59.9999999';
--disable_prepare_warnings
SELECT @@global.system_versioning_asof;
SET @@global.system_versioning_asof= DEFAULT;

--echo #
--echo # MDEV-23562 Assertion `time_type == MYSQL_TIMESTAMP_DATETIME' failed upon SELECT from versioned table
--echo #

CREATE TABLE t1 (a INT) WITH SYSTEM VERSIONING;
SET system_versioning_asof= DATE(NOW());
SELECT * FROM t1;
DROP TABLE t1;
SET system_versioning_asof= DEFAULT;

--echo # End of 10.4 tests