Updating LONG columns

[Dave Pylatuk]

Hello all. I have a question about updating a LONG datatype
column in Oracle 8.1.7.

I have a STUDENT table like:

student_id INTEGER PK
student_comment s LONG

I want to execute a command like this:

UPDATE student SET student_comment s = student_comment s || 'some new
comments' WHERE student_id = 1;

I am getting an error message indicating incompatible data types.
Do I have to do some sort of conversion/cast to add my new
comments to the existing ones ?

Thanks in advance