--disable_query_log
set @@session.explicit_defaults_for_timestamp=off;
--enable_query_log
# owner: bin.lb
# owner group: SQL1
# tags: join
# description:
# join using case
#

--disable_warnings
drop table if exists tjuo1,tjuo2,tjuo3;
--enable_warnings
create table tjuo1 (pk int,c1 int, primary key(pk));
create table tjuo2 (pk int,c1 int, c2 int, primary key(pk));
create table tjuo3 (pk int,c2 int, primary key(pk));
insert into tjuo1 values(1, 11), (2, 12), (3, 13);
insert into tjuo2 values(4, 11, 21), (5, 12, 22), (6, 13, 23);
insert into tjuo3 values(7, 21), (8, 22), (9, 23);
select * from tjuo1;
select * from tjuo2;
select * from tjuo3;

#2T
SELECT * FROM tjuo1 JOIN  (SELECT * FROM tjuo2) as tjuo2_alias  on tjuo1.c1= tjuo2_alias.c1;
SELECT * FROM tjuo1 RIGHT JOIN (SELECT * FROM tjuo2) as tjuo2_alias  USING (c1);

#3T
SELECT * FROM tjuo1 JOIN tjuo2 on tjuo1.c1=tjuo2.c1 JOIN tjuo3 on tjuo2.c2=tjuo3.c2;
SELECT * FROM tjuo1 RIGHT JOIN tjuo2 USING (c1) RIGHT JOIN tjuo3 USING (c2);
SELECT * FROM tjuo1 RIGHT JOIN (SELECT * FROM tjuo2) as tjuo2_alias USING (c1) RIGHT JOIN tjuo3 USING (c2);
SELECT * FROM  (SELECT * FROM tjuo1) tjuo1_alias RIGHT JOIN (SELECT * FROM tjuo2) as tjuo2_alias USING (c1) RIGHT JOIN (SELECT * FROM tjuo3) as tjuo3_alias USING (c2);
SELECT * FROM  (SELECT * FROM tjuo1) tjuo1_alias RIGHT JOIN tjuo2  USING (c1) RIGHT JOIN (SELECT * FROM tjuo3) as tjuo3_alias USING (c2);
SELECT * FROM  (SELECT c2 FROM tjuo1 as i1 JOIN (SELECT * FROM tjuo2) as i2 USING (c1) ) as t12 RIGHT JOIN (SELECT * FROM tjuo3) as tjuo3_alias USING (c2);
SELECT * FROM  (SELECT c2 FROM tjuo1 as i1 JOIN (SELECT * FROM tjuo2) as i2 USING (c1) ) as t12;
drop table tjuo1, tjuo2, tjuo3;