RE: ResultSet null column

[Keith_McCully@xxxxxxxxxxxxxxx]

Patrick & Joel

You're absolutely right - the problem was with using the .trim() method up
front. The two step process listed below worked fine.

Thanks and regards,

Keith





"Patrick L Archibald" <Patrick.Archibald@HOMETELCO.COM> on 31/07/2002 13:48:32

Please respond to java400-l@midrange.com

To:   java400-l@midrange.com
cc:    (bcc: Keith McCully/Wunderman/GB)

Subject:  RE: ResultSet null column



Have you tried?

String FIELDX = rs.getString("BFIELD2");
if (FIELDX != null) FIELDX = FIELDX.trim();

Thanx, PLA

-----Original Message-----
From: java400-l-admin@midrange.com
[mailto:java400-l-admin@midrange.com]On Behalf Of
Keith_McCully@wunderman.co.uk
Sent: Wednesday, July 31, 2002 8:18 AM
To: java400-l@midrange.com
Subject: ResultSet null column





I have built a prepared statement that links data from 2 DB2/400 tables. Left
join is used because there will not always be a key matched row in table B but I
would always expect 1 row from table A.

PreparedStatement stmt1 = connection.prepareStatement("SELECT AFIELD1, AFIELD2,
BFIELD1, BFIELD2
     FROM A LEFT JOIN B ON AFIELD1 = BFIELD1 WHERE AFIELD1 = ?")

After I do a stmt1.executeQuery() into a ResultSet (rs) and then extract BFIELD2
as
     String FIELDX = rs.getString("BFIELD2").trim()
If a matched row in file B exists when I load FIELDX, then everything works fine
but ,if not ,then I get a NullPointerException.

I tried testing rs.getString for null prior to FIELDX load but no success.  Any
comments and suggestions on how to check for null would be very welcome!

Thanks,

Keith


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