Problem Updating BLOB Data in DB

Question

Hi, There,
I have a problem when updating BLOB data in database table. I am
using Oracle 8.1.6, JDK1.3.0., oracle thin driver.
I have a Handle object handle (javax.ejb.Handle), and I need to
save this object in DB. The table has 2 columns: column 1
is "PK" Varchar2(30) Primary Key, column 2 is "HANDLE" BLOB.
According to the documentation I found from Oracle, I first
initialize the blob column, and then get the BLOB locator.
However when I try to update the BLOB data by invoking
executeUpdate() method on OraclePreparedStatement ops, I always
get the returned int rowCount=0, which indicates that no rows
have been updated. (This is verified by trying to retrieve the
BLOB column value which results in SQLException: Exhausted
Resultset.)
Any suggestions what was wrong with the code? Thank you a lot in
advance!
Tom
Part of the code is listed below:
// If jSessionID is not found, create it
HttpSession session = request.getSession(true);
String jSessionID = session.getId();
//get the Hanlde object for MemberInfo bean
javax.ejb.Handle handle = memberValidate.validateMember(
memberID, "" );
oracle.sql.BLOB oracleBlob = null;
/* Get DB connection */
try
Connection conn = getDBConnection(); // with oracle thin driver
conn.setAutoCommit(false);
catch (NamingException ne)
System.out.println( "Failed to getDBConnection due to Naming
Exception" + ne.toString() );
return;
catch (SQLException sqle)
System.out.println( "Failed to getDBConnection due to SQL
Exception"+ sqle.toString() );
return;
try
pstmt=conn.prepareStatement("CREATE TABLE TOM1 (PK VARCHAR(30)
PRIMARY KEY, HANDLE BLOB NOT NULL)");
pstmt.execute();
pstmt=conn.prepareStatement("INSERT INTO TOM1 VALUES('ROW1',
EMPTY_BLOB())");
pstmt.executeUpdate();
pstmt=conn.prepareStatement("SELECT HANDLE FROM TOM1 WHERE
PK=? FOR UPDATE");
pstmt.setString(1, "ROW1");
ResultSet rset = pstmt.executeQuery();
if ( rset.next() )
// Get the LOB locator from the ResultSet
oracleBlob = ((OracleResultSet)rset).getBLOB("HANDLE");
OraclePreparedStatement ops = null;
ops = ( OraclePreparedStatement )
(conn.prepareStatement("UPDATE TOM1 SET HANDLE = ?
WHERE PK = ?"));
ops.setString( 2, jSessionID );
// using OutputStream to write object data
OutputStream oStream = oracleBlob.getBinaryOutputStream();
ObjectOutputStream outStream = new ObjectOutputStream
(oStream);
outStream.writeObject(handle); // handle is the Object to be
saved
outStream.close();
conn.commit();
conn.setAutoCommit(true);
ops.setBLOB( 1, oracleBlob );
int rowCount = ops.executeUpdate();
System.out.println("\n**** Rows affected: ");
System.out.println(ops.executeUpdate());
if (rowCount != 0)
// Commit the transaction:
System.out.println("\n**** conn.commit() OK...");
System.out.println("\n**** Handle saved in DB as Blob-type
OK...");
conn.commit();
conn.close();
else
System.out.println("\n**** ops.executeUpdate() == 0, Failed
to update DB");
conn.close();
return;
catch ( SQLException se )
se.printStackTrace();
return;
catch ( Exception e )
System.out.println(e.toString());
return;
System.out.println("\n**** DB update OK...");
null

Answer 1

You cannot update Blob column in Adf testing tool as far i think
check this blog might help you to store images in ADF http://baigsorcl.blogspot.com/2010/09/store-images-in-blob-in-oracle-adf.html