asolimando commented on code in PR #4378:
URL: https://github.com/apache/calcite/pull/4378#discussion_r2099806159
##########
core/src/test/resources/sql/scalar.iq:
##########
@@ -301,4 +301,21 @@ from (values (1), (3)) t1(id);
!ok
+# Several scalar sub-queries reference different tables in FROM list
+select
+ (select ename from emp where empno = empnos.empno) as emp_name,
+ (select dname from dept where deptno = deptnos.deptno) as dept_name
+ from (values (7369), (7499)) as empnos(empno), (values (10), (20)) as
deptnos(deptno) order by 1, 2;
++----------+------------+
+| EMP_NAME | DEPT_NAME |
++----------+------------+
+| ALLEN | ACCOUNTING |
+| ALLEN | RESEARCH |
+| SMITH | ACCOUNTING |
+| SMITH | RESEARCH |
++----------+------------+
+(4 rows)
Review Comment:
```
CREATE TABLE emp (
empno INT,
ename VARCHAR(100)
);
CREATE TABLE dept (
deptno INT,
dname VARCHAR(100)
);
INSERT INTO dept VALUES (1, 'ACCOUNTING');
INSERT INTO dept VALUES (2, 'RESEARCH');
INSERT INTO emp VALUES (7369, 'ALLEN');
INSERT INTO emp VALUES (7499, 'SMITH');
select
(select ename from emp where empno = empnos.empno) as emp_name,
(select dname from dept where deptno = deptnos.deptno) as dept_name
from (values (7369), (7499)) as empnos(empno),
(values (1), (2)) as deptnos(deptno)
order by 1, 2;
```
validated with
[sqlfiddle](https://sqlfiddle.com/postgresql/online-compiler?id=406f65d5-6b88-4df5-a531-9d7dedc676f5)
with PostgreSQL and it's giving the same result
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