How to update TimeStamp in Oracle database

[somenath chatterjee]

Hi all,
I want to copy date from one table to another with column type like eg: BLOB, CLOB, RAW, TimeStamp data. But when i am going to update timestamp datatype in target table its giving error:

Internal Error: Unable to construct a Datum from the specified input

giving some code for understanding clearly-

rs = stmt.executeQuery("SELECT COUNT(*) AS rowcount FROM "+ srcTable);
while(rs.next()){
rowCount = rs.getRow();

rSet = stmt.executeQuery("SELECT * FROM "+srcTable);
rsTarget = stmtTarget.executeQuery("SELECT "+srcColumn+" FROM "+tarTable);
while (rSet.next() && rsTarget.next()) {
if(srcColType.equals("BLOB")){

// this blob data successfily updating in target table try {
blobVal = rSet.getBlob(srcColumn);
rsTarget.updateBlob(srcColumn, blobVal);
} catch (Exception e) {
e.printStackTrace();}
/* this part showing error message Internal Error: Unable to construct a Datum from the specified input*/
try {
time = rSet.getTimestamp(srcColumn);
rsTarget.updateTimestamp(srcColumn, time);
} catch (Exception e) {
e.printStackTrace();}
rsTarget.updateRow();
}
}

Please Let me know if you faced similar problem and the solution if available