Error updating a CLOB XML fragment

Question

Hi,
I have an xml schema that contains an element of type xs:anyType that has been mapped to Oracle as CLOB.
Now I have the needs to update this value but I was not able to do it.
The code that does the update is the following:
public void updateXML(String sqlCmd, String XMLString) throws Exception
DataSource ds = null;
Connection conn = null;
OraclePreparedStatement stmt = null;
oracle.sql.CLOB tempCLOB = null;
Writer tempCLOBWriter= null;
try
//Get Data Source
ds = (DataSource) new InitialContext().lookup(xmlDS);
// Get Connection
conn = ds.getConnection();
// Prepare statement with requested insert, update or delete statement
stmt = (OraclePreparedStatement) ((OracleConnection) conn).prepareStatement(sqlCmd);
// Build CLOB containing XML if required
if (XMLString != null)
tempCLOB = oracle.sql.CLOB.createTemporary
( ((WLConnection)conn).getVendorConnection(),
true,
CLOB.DURATION_SESSION);
try {
tempCLOB.open(CLOB.MODE_READWRITE);
tempCLOBWriter = tempCLOB.getCharacterOutputStream();
tempCLOBWriter.write(XMLString);
tempCLOBWriter.flush();
} finally {
if (tempCLOBWriter != null)
tempCLOBWriter.close();
//Set parameter on Prepared Statement
stmt.setCLOB(1,tempCLOB);
// Execute command
stmt.executeUpdate();
// Clean up CLOB data if required
if (XMLString != null)
tempCLOB.freeTemporary();
// Return connection to the pool
conn.close();
catch ( Exception e)
if (conn != null)
conn.close();
throw e;
IF the sqlCmd param contains:
update XML_OPERAZIONE_LOG t
set value(t) = updateXML(value(t),
'/operazione.log/Operazione',XMLTYPE(?))
where existsNode(value(t),
'/operazione.log/Journal [NumeroElettronico="99900000"]') = 1
I get the error ORA-17410 "No More Data to read from socket"
If the sqlCmd contains:
insert into XML_OPERAZIONE_LOG values( XMLType(?))
I have no problems.
Any Idea ?
Oracle 9.2.0.2.0, latest classes12.zip BEW Web Logic 8.1

Answer 1

Upgrade to 9.2.0.5.0 since 9.2.0.2.0 is not supported for XMLType. Also try OCI rather than thin dirver.