Monday Morning Woes -- Pointer Exceptions and other assorted aggravation

Question

Gotta love Mondays.
Anyway, here's my latest issue:
A DataTable grabs all of the information from my database that I request AND it calculates a value based on two colums and throws them into a temporary column, which is exactly what I want it to do.
HOWEVER -- I want to take that information from the temporary column and transfer it to another column for storage. I've received a fair amount of errors, ranging from 'execute() not called' to the current one, nullPointerException.
Enclosed is a snippet of my greatly messed-up code, since I've been tinkering with this for quite some time.
po_itemsRowSet.setObject(1,getSessionBean1().getCurr_Item());
po_itemsRowSet.execute();
getSessionBean1().setTempPrice(new Integer(po_itemsRowSet_table.getInt("ext_price2")));
po_itemsRowSet.updateInt("ext_price", getSessionBean1().getTempPrice().intValue());
po_itemsRowSet.updateRow();
po_itemsRowSet.commit();
po_itemsRowSet.execute();
As you can see, I'm trying to store the information in the SessionBean and then implement it into the primary RowSet, similar to the methods I used for row insertion and updates. But also, as you can see, while the code is valid, something is missing that I'm not understanding.
Any insight on the issue would be absolutely wonderful.
Thanks, in advance.

Answer 1

Alright, let's simplify the issue, then.
If I can get the following code to work, my problem will be resolved.
getSessionBean1().setCurr_Item(((Integer) getValue("#{currentRow.ID}")));
po_itemsRowSet.setCommand(" update po_items SET ext_price = qty * unit_price where ID = ?");
po_itemsRowSet.setObject(1,getSessionBean1().getCurr_Item());
po_itemsRowSet.execute();
The error:
java.sql.SQLException: Can not issue data manipulation statements with executeQuery(). [