Problem with calling a oracle stored procedure

Question

Hi,
I am using the following callable statement to invoke a oracle stored procedure/function.
String myCallableStmt="{?=call IB_DDL.CREATE_DATASET(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)}";
But I am getting the following errors which do not make sense to me
Exception in thread "main" java.lang.NullPointerException
     at oracle.jdbc.driver.T4C8Oall.getNumRows(T4C8Oall.java:870)
     at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:956)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1159)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3284)
     at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3389)
     at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4222)
     at org.jtdemo.CreateDataSet.callCreateDatasetProcedure(CreateDataSet.java:246)
     at org.jtdemo.Main.main(Main.java:29)
Can anyone help me here.
Thanks in advance
Kalyan

Answer 1

May be I have used the word "procedure" loosely. Its infact a oracle function which returns a message of type Varchar2. Hence "{?=.....} here is used for registering the return value from the function. The remaining statement CREATE_DATASET(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?), here the first 14 are input parameters whereas the last one is the OUT parameter of the function. Hope this helps. Anways I am pasting my code below...
CallableStatement cstmt = null;
          String myCallableStmt="{?=call IB_DDL.CREATE_DATASET(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)}";
          try {
               System.out.print("Creating DataSet.......\n");
               cstmt = targetCon.prepareCall(myCallableStmt);
               cstmt.setObject("USER_ID_IN",this.USER_ID_IN);
               cstmt.setObject("TABLE_NAME_IN",this.TABLE_NAME_IN);
               cstmt.setObject("LAYOUT_IN",this.layoutCollection);
               cstmt.setObject("DATA_TABLESPACE_IN",this.DATA_TABLESPACE_IN);
               cstmt.setObject("INDEX_TABLESPACE_IN",this.INDEX_TABLESPACE_IN);
               cstmt.setObject("STRING_POOL_NAME_IN",this.STRING_POOL_NAME_IN);
               cstmt.setObject("NUMBER_POOL_NAME_IN",this.NUMBER_POOL_NAME_IN);
               cstmt.setObject("DATE_POOL_NAME_IN",this.DATE_POOL_NAME_IN);
               cstmt.setObject("LINK_POOL_NAME_IN",this.LINK_POOL_NAME_IN);
               cstmt.setObject("DATASET_LEVEL_CONSTR_TYPE",this.DATASET_LEVEL_CONSTR_TYPE);
               cstmt.setObject("DATASET_LEVEL_CONSTR_BODY",this.DATASET_LEVEL_CONSTR_BODY);
               cstmt.setObject("POOLING_IN",this.POOLING_IN);
               cstmt.setObject("SEGMENTATION_IN",this.SEGMENTATION_IN);
               cstmt.setObject("DATASET_PARTITIONING_IN",this.DATASET_PARTITIONING_IN);
               cstmt.registerOutParameter("DATASET_ID_OUT",OracleTypes.INTEGER);
               cstmt.registerOutParameter("RETURN_MESSAGE",OracleTypes.VARCHAR);
               cstmt.execute();
               String returnMessage = (String)cstmt.getObject("RETURN_MESSAGE");
               System.out.print(returnMessage);
          }catch(SQLException e) {
               e.printStackTrace();
          }