How to access oracle cursors using jdbc (expecting ur earliest reply)

Question

Hi All,
can anyone help me out by giving me an idea or sample code in accessing the cursors that are defined in the oracle... i have to access those cursors using java... Thanks in advance for your reply and time....
Ragu

Answer 1

I have tried to follow the example from the URL link you provided.
I'm using :
- Oracle 8.1.6/8.1.7
- JDK 1.3.1
I've created:
create or replace package types
as
type cursorType is ref cursor;
end;
create or replace function sp_ListEmp return types.cursortype
as
l_cursor types.cursorType;
begin
open l_cursor for
select ename, empno
from emp
order by ename;
return l_cursor;
end;
Then I have on my code the following:
import java.sql.*;
import oracle.jdbc.driver.*;
String conStatus = "":
String driver_class = "oracle.jdbc.driver.OracleDriver";
String connect_string = "jdbc:oracle:thin:@slackdog:1521:oracle8";
String query = "begin :1 := sp_listEmp; end;";
Connection conn;
Class.forName(driver_class);
conn = DriverManager.getConnection(connect_string, "scott", "tiger");
try{
conStatus = "before prepareCall, ";
CallableStatement cstmt = conn.prepareCall(query);
conStatus = conStatus + "before Register out, ";
cstmt.registerOutParameter(1,OracleTypes.CURSOR);
conStatus = conStatus + "before execute, ";
cstmt.execute();
conStatus = conStatus + "before getObject, ";
ResultSet rset = (ResultSet)cstmt.getObject(1);
while (rset.next ())
System.out.println( rset.getString (1) );
cstmt.close();
} catch (Exception e) {
conStatus = conStatus + e;
System.out.println(conStatus);
What happens is that I am able to successfully compile the code. But when I run the code, it displays:
"before prepareCall, before Register out, SQLException: incompatible types = -10."
What does that mean? Pls point out to me what I did wrong in my code.
Thanks.