| set hive.cli.print.header=true; |
| |
| create table t1 (a int not null, b varchar(10) not null); |
| create table t2 (c int not null, d varchar(10) not null); |
| |
| insert into t1 values (2, 'four'), (1, 'four'); |
| insert into t2 values (1, 'three'), (3, 'three'); |
| |
| |
| explain cbo |
| select * from (select a, b from t1 where 0=1) s |
| full outer join t2 on s.a = t2.c; |
| |
| select * from (select a, b from t1 where 0=1) s |
| full outer join t2 on s.a = t2.c; |
| |
| |
| explain cbo |
| select * from t1 |
| full outer join (select c, d from t2 where 0=1) s on t1.a = s.c; |
| |
| select * from t1 |
| full outer join (select c, d from t2 where 0=1) s on t1.a = s.c; |
