About using cursor expressions in Oracle Reports

I've just discovered a rather old syntax of the mighty select statement. It seems related to the concept of inline view or more precisely scalar view. It's the cursor syntax in a select statement.
Example:
select d.dname
,cursor(select e.empno,e.ename,sal
from scott.emp e
where e.deptno = d.deptno)
from scott.dept d
I have two questions:
1) Performance: how is the performance of this select in comparison to standard join?
2) Usage: I've use this from sqlplus and it's ok, but can't use it on a tool like Oracle Reports. Although the select statement is correctly processed, can't display it since the datatype is Database - Unknown ...
It seems there´s no way to use cursor expressions at least if datasource is a SQL Query.
Thanks in advance ....

I think you have answered your own question: CURSOR is not something you can display.

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With static ref cursor this is not possible in all cases.
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I am trying to insert rows into a table based on information from another table.
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About using cursor expressions in Oracle Reports

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