RE: AS/400 ToolBox JDBC 2.0 using scrolling a ResultSet

The Toolbox JDBC driver implements ResultSet updates using UPDATE ... WHERE
statements.  Therefore, the questions you ask really relate to the AS/400
database, not just JDBC.  According to the "DB2 UDB for AS/400 SQL
Reference", you can't do updates when using an ORDER BY clause.  However,
it says nothing about the WHERE clause, so I suspect that will work as you
expect.  You can dig into all the gory details in the SQL reference.

- Clif
_______________________________________
Clifton M. Nock (cnock@us.ibm.com)
AS/400 Toolbox for Java


---------------------- Forwarded by Dave Wall/Rochester/IBM on 04/07/2000
07:57 AM ---------------------------

Pluta@nexgensoftware.com on 04/05/2000 11:15:55 AM

Please respond to JAVA400-L@midrange.com

To:   JAVA400-L@midrange.com
cc:
Subject:  RE: AS/400 ToolBox JDBC 2.0 using scrolling a ResultSet






"
(...)
(concise yet detailed explanation of how to make a ResultSet updateable)
(...)

The ResultSet will be updateable."

------------

Now, Clif, what happens if you change a field that would have caused the
ResultSet's order to change?  Say there's an ORDER BY in the list... does
that record just sort of stay there?  Similarly with a WHERE clause... if
you change a record so that it no longer fulfills the WHERE clause, does it
stay there too?  In fact, I'd guess the ResultSet is oblivious to changes
made by other jobs as well; that is, additions and deletions by other
programs can't be seen without re-creating the ResultSet - in that manner,
the ResultSet acts like an OPNQRYF.

I'm guessing the answer to all the above questions is "yes", but it would
be nice to know.

As many people know, I'm not a big fan of updating via SQL (except maybe
for big "UPDATE ... WHERE" type jobs), so I don't know much about it, and
I'm just learning about scrolling ResultSets.


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