String returned from oracle stored procedure to Java with '???'

Question

My code in Java calls stored procedure in Oracle DB and returns object with some fields. When I find out the attributes from the Object - I have problem with the string. The string becomes '???' (3 questtion marks) and it not supposed to be that! (integer returned OK)

I tested my stored procedure on the DB - It worked well.

I tested my Java code with small local main program that call to the DB - and it worked well. (The connection the the DB was direct with DriverManager.getConnection("jdbc:oracle:thin:@......); )

The problem came when I used my store procedure in my big project that connect to the DB with the weblogic.

Do you know how to get the right string from the DB when I work with the WebLogic?

Oracle code:

  PROCEDURE SearchOrder (InWoArr IN WoTab,
                     OutWoAccStat OUT WoAccStatTab) as
  outRec WoAccStatType;
  wo number(10);
  acc number(10);
  stat varchar2(2);
  begin
  OutWoAccStat := WoAccStatTab();
    for i in InWoArr.FIRST .. InWoArr.LAST loop
    OutWoAccStat.EXTEND;
      begin
       select work_order_number,account_number,' '
    into wo,acc,stat
    from table1
    where work_order_number=InWoArr(i);
    ....
    outRec := WoAccStatType(wo,acc,stat);
    OutWoAccStat(i) := outRec;
  exception
    when no_data_found then
      outRec := WoAccStatType(InWoArr(i),0,' ');
      OutWoAccStat(i) := outRec;
  end;
end loop;
end SearchOrder;

//Array of 200

create or replace type poldev_dba.WoAccStatTab as VARRAY(200) of WoAccStatType

//The array type

create or replace type poldev_dba.WoAccStatType as object (work_order_number number(10), account_number number(10), wo_status varchar2(2))

//Java code:

              //Store Procedure Name
          CallableStatement cs = (CallableStatement) con.prepareCall("{ call spp.SearchOrder( ?, ? )}");                                                                                    

          //input:
          cs.setArray(1,woInput);

          //Output:
          cs.registerOutParameter(2,OracleTypes.ARRAY,"WOACCSTATTAB");

          //Run the query...
          cs.execute();

          //Retrieve Array:
          woAccArray = (ARRAY)cs.getArray(2);
          woAccRecs = (Object[])woAccArray.getArray();

          int wo = 0;
          int acc = 0;
          String stat;

          for (int i = 0; i < woAccRecs.length; i++) {
              /* Since we don't know the type of the record, get it into STRUCT !! */
              STRUCT woAccRec = (oracle.sql.STRUCT)woAccRecs[i];
              /* Get the attributes - nothing but the columns of the table */
              Object[] attributes = woAccRec.getAttributes();

              /* attribute 0 - work order */
              wo = Integer.parseInt("" + attributes[0]);

              /* attribute 1 - account number */
              acc = Integer.parseInt("" + attributes[1]);

              /* attribute 2 - status */
              stat = (String) attributes[2]; 
              /*PROBLEM!!!! stat returned value '???'*/

              System.out.println("wo = " + wo + ",acc = " + acc +", status = "+stat);

Answer 1

The problem is elsewhere. Neither the Oracle DB nor the DB driver will replace a result column with ???. Search the code of your product for this string to see why it is used.