RETURNING INTO Clause (Insert)

I am attempting to optimize a very large script and came discovered the RETURNING INTO clause.

I was attempting to test it thus;

DECLARE
tempvar VARCHAR2(50);
BEGIN
INSERT INTO Garbage( Garbage1, Garbage2 )
( SELECT 'test3', TestID
FROM Test
WHERE TestID = 9052 )
RETURNING Garbage1 INTO tempvar;

DBMS_OUTPUT.PUT_LINE(tempvar);
END;
/

Garbage1 and Garbage2 are both VarChar2(21)'s. The TestID exists as a unique ID (only one row is returned).

Whenever I run this script, modified many different ways, I get; "ORA-00933: SQL command not properly ended"

What I actually wanted to test was;

DECLARE
tempvar VARCHAR2(50);
BEGIN
INSERT INTO Garbage( Garbage1, Garbage2 )
( SELECT 'test3', TestID, TestName
FROM Test
WHERE TestID = 9052 )
RETURNING TestName INTO tempvar;

DBMS_OUTPUT.PUT_LINE(tempvar);
END;
/

I wanted to see if I could return from the Select statement or if I had to return from the INTO table.

I am accessing an Oracle 9i database using an Oracle 8i Client (apparently there is no Oracle 9i Client according to our DBA).

Thanks for your insite.

returning into only works with VALUES, for example

insert into xxx values(1, (select yy from zz where a=x))

this would work, the problem with subquery is that you can get more than one row back and since a variable is not an array therefore this restriction