Problem with prepared statement where cluase when passing string value.Help

Question

I am updating a table using the following code. I am using string parameter in where clause. if I use Long parameter in where clause with ps.setLong , this code is working. Is there any special way to pass string value? Am I doing anything wrong?
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updateMPSQL.append("UPDATE MP_Table SET ");
     updateMPSQL.append("MPRqmt = ?,End_Dt = ? ");
          updateMPSQL.append("where POS = ? ");
          System.out.println(updateMPSQL.toString());
          con     = getConnection(false) ;
          ps      = con.prepareStatement(updateMPSQL.toString());
          ps.setLong(1,MPB.getMPRqmt());
          ps.setDate(2,MPB.getEnd_Dt());
          ps.setString(3,MPB.getPos());
result = ps.execute();
          System.out.println("Result : " + result);
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Please help me.
Thanks in advance.
Regards,
Sekhar

Answer 1

doesn't Pos look like a number rather than a string variable?
if I use Long
parameter in where clause with ps.setLong , this code
is working.
updateMPSQL.append("where POS = ? ");
ps.setString(3,MPB.getPos());