-- (no id or description)
create table t1(t1v1 int, t1v2 int);
create table t2(t2v1 int, t2v3 int);
insert into t1 values (0, 0), (1, 1), (2, 2);
insert into t2 values (0, 200), (1, 201), (2, 202);

/*
3
3
*/

-- test self join
select * from t1 as a, t1 as b where a.t1v1 = b.t1v1;

/*
(Join t1 t1)

LogicalProjection { exprs: [ #0, #1, #2, #3 ] }
└── LogicalFilter
    ├── cond:Eq
    │   ├── #0
    │   └── #2
    └── LogicalJoin { join_type: Cross, cond: true }
        ├── LogicalScan { table: t1 }
        └── LogicalScan { table: t1 }
PhysicalHashJoin { join_type: Inner, left_keys: [ #0 ], right_keys: [ #0 ] }
├── PhysicalScan { table: t1 }
└── PhysicalScan { table: t1 }
0 0 0 0
1 1 1 1
2 2 2 2
*/