create database mysqltest1;
create user ''@localhost;
create user foo@localhost;
create role bar;
grant select on *.* to ''@localhost;
grant select,insert on *.* to foo@localhost;
grant select,insert on *.* to bar;
grant bar to ''@localhost;
create table t1 (n varchar(100),
u varchar(100) default user(),
cu varchar(100) default current_user(),
cr varchar(100) default current_role(),
d  varchar(100) default database());
create definer=foo@localhost view mysqltest1.v1 as select * from t1;
create definer=bar           view            v2 as select * from t1;
create                       view            v3 as select * from v2;
create definer=foo@localhost view mysqltest1.v4 as select default(n),default(u),default(cu),default(cr), default(d) from t1;
create definer=bar           view            v5 as select default(n),default(u),default(cu),default(cr), default(d) from t1;
create                       view            v6 as select * from v5;
insert t1 (n)  values ('t1');
insert mysqltest1.v1 (n)  values ('v1');
insert v2 (n)  values ('v2');
insert v3 (n)  values ('v3');
select default(n),default(u),default(cu),default(cr), default(d) from t1 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	root@localhost	root@localhost	NULL	test
select * from mysqltest1.v4 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	root@localhost	foo@localhost	NULL	test
select * from v5 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	root@localhost	@	bar	test
select * from v6 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	root@localhost	@	bar	test
connect  conn,localhost,conn,,mysqltest1;
set role bar;
insert test.t1 (n)  values ('t1');
insert v1 (n)  values ('v1');
insert test.v2 (n)  values ('v2');
insert test.v3 (n)  values ('v3');
select default(n),default(u),default(cu),default(cr), default(d) from test.t1 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	conn@localhost	@localhost	bar	mysqltest1
select * from v4 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	conn@localhost	foo@localhost	NULL	mysqltest1
select * from test.v5 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	conn@localhost	@	bar	mysqltest1
select * from test.v6 limit 1;
default(n)	default(u)	default(cu)	default(cr)	default(d)
NULL	conn@localhost	@	bar	mysqltest1
connection default;
disconnect conn;
select * from t1;
n	u	cu	cr	d
t1	root@localhost	root@localhost	NULL	test
v1	root@localhost	foo@localhost	NULL	test
v2	root@localhost	@	bar	test
v3	root@localhost	@	bar	test
t1	conn@localhost	@localhost	bar	mysqltest1
v1	conn@localhost	foo@localhost	NULL	mysqltest1
v2	conn@localhost	@	bar	mysqltest1
v3	conn@localhost	@	bar	mysqltest1
drop database mysqltest1;
drop view v2, v3, v5, v6;
drop table t1;
drop user ''@localhost;
drop user foo@localhost;
drop role bar;
create table t1 (a date,
mn varchar(100) default monthname(a),
dn varchar(100) default dayname(a),
df varchar(100) default date_format(a, "%a, %b"));
insert t1 (a) values ('2010-12-2');
set lc_time_names=de_DE;
insert t1 (a) values ('2010-12-2');
set lc_time_names=default;
select * from t1;
a	mn	dn	df
2010-12-02	December	Thursday	Thu, Dec
2010-12-02	Dezember	Donnerstag	Do, Dez
drop table t1;
create table t1 (a varchar(100) default @@sql_mode);
insert t1 () values ();
set sql_mode=ansi;
insert t1 () values ();
set sql_mode=default;
select * from t1;
a
STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
REAL_AS_FLOAT,PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,ANSI
drop table t1;
set time_zone='+00:00';
create table t1 (a int, b datetime default from_unixtime(a), c datetime);
insert t1 (a, c) values (1569495327, from_unixtime(1569495327));
set time_zone='+01:00';
insert t1 (a, c) values (1569495327, from_unixtime(1569495327));
flush tables;
insert t1 (a, c) values (1569495327, from_unixtime(1569495327));
select * from t1;
a	b	c
1569495327	2019-09-26 10:55:27	2019-09-26 10:55:27
1569495327	2019-09-26 11:55:27	2019-09-26 11:55:27
1569495327	2019-09-26 11:55:27	2019-09-26 11:55:27
drop table t1;
set time_zone = "+00:00";
create table t1 (a int, b timestamp as (from_unixtime(a)) virtual);
insert into t1 (a) value (1569495327);
select a, b, from_unixtime(a) from t1;
a	b	from_unixtime(a)
1569495327	2019-09-26 10:55:27	2019-09-26 10:55:27
set time_zone = "+01:00";
select a, b, from_unixtime(a) from t1;
a	b	from_unixtime(a)
1569495327	2019-09-26 11:55:27	2019-09-26 11:55:27
flush tables;
select a, b, from_unixtime(a) from t1;
a	b	from_unixtime(a)
1569495327	2019-09-26 11:55:27	2019-09-26 11:55:27
drop table t1;