DROP DATABASE IF EXISTS unsigned_joins_db;
CREATE DATABASE unsigned_joins_db;
USE unsigned_joins_db;
create table customer (
c_custkey int,
c_name varchar (25),
c_address varchar (40),
c_nationkey int,
c_phone char (15),
c_acctbal decimal(12,2),
c_mktsegment char (10),
c_comment varchar (117)
) engine=columnstore;
create table orders (
o_orderkey int,
o_custkey int,
o_orderstatus char (1),
o_totalprice decimal(12,2),
o_orderdate date,
o_orderpriority char (15),
o_clerk char (15),
o_shippriority int,
o_comment varchar (79)
) engine=columnstore;
LOAD DATA LOCAL infile 'MTR_SUITE_DIR/../std_data/1m_customer.tbl' INTO TABLE customer FIELDS TERMINATED BY '|';;
LOAD DATA LOCAL infile 'MTR_SUITE_DIR/../std_data/1m_orders.tbl' INTO TABLE orders FIELDS TERMINATED BY '|';;
alter table customer add column u_custkey int unsigned;
update customer set u_custkey=c_custkey;
alter table orders add column u_custkey int unsigned;
update orders set u_custkey=o_custkey;
select count(*) as count1 from customer join orders on orders.u_custkey = customer.u_custkey;
count1
1500
select count(*) as count2 from customer left join orders on orders.u_custkey = customer.u_custkey;
count2
1550
select count(*) as count3 from customer right join orders on orders.u_custkey = customer.u_custkey;
count3
1500
select count(*) as count4 from customer where exists (select u_custkey from orders where orders.u_custkey = customer.u_custkey);
count4
100
select count(*) as count5 from customer where not exists (select u_custkey from orders where orders.u_custkey = customer.u_custkey);
count5
50
select count(*) as count11 from customer join orders on orders.o_custkey = customer.u_custkey;
count11
1500
select count(*) as count12 from customer left join orders on orders.o_custkey = customer.u_custkey;
count12
1550
select count(*) as count13 from customer right join orders on orders.o_custkey = customer.u_custkey;
count13
1500
select count(*) as count14 from customer where exists (select u_custkey from orders where orders.o_custkey = customer.u_custkey);
count14
100
select count(*) as count15 from customer where not exists (select u_custkey from orders where orders.o_custkey = customer.u_custkey);
count15
50
select count(*) as count11 from customer join orders on orders.u_custkey = customer.c_custkey;
count11
1500
select count(*) as count12 from customer left join orders on orders.u_custkey = customer.c_custkey;
count12
1550
select count(*) as count13 from customer right join orders on orders.u_custkey = customer.c_custkey;
count13
1500
select count(*) as count14 from customer where exists (select u_custkey from orders where orders.u_custkey = customer.c_custkey);
count14
100
select count(*) as count15 from customer where not exists (select u_custkey from orders where orders.u_custkey = customer.c_custkey);
count15
50
alter table customer drop column u_custkey;
alter table orders drop column u_custkey;
DROP DATABASE unsigned_joins_db;