How can I catch a resultset thrown out by PL/SQL procedure or function.

Question

hi,
I want to write a program in java which receives a resultset
from PL/SQL , how can I do that.
I don't want to create the resultset by passing a simple sql
statement, I want the sql statement to be executed in the
procedure or function,
which in turn returns a PL/SQL table of records, or refcursor,
and capture it in the resultset.

Answer 1

Here's a quick note on how I do it:
1. RETURN a REF CURSOR from your PL/SQL function.
2. In your Java program, you declare the return type from the
Statement as OracleTypes.CURSOR.
/* Prepare your PL/SQL function call here */
CallableStatement mystatement = myconnection.prepareCall
( "BEGIN ? := myfunction( p_param => ? ); END;" );
/* Register the Oracle REF CURSOR as the return type */
mystatement.registerOutParameter(1, OracleTypes.CURSOR);
/* Set any additional input parameters to your function */
mystatement.setString(2, "Param value");
3. When you fetch the cursor from your Statement, do getObject
() and then cast the Object as a ResultSet e.g.:
mystatement.execute);
ResultSet rs = (ResultSet) mystatement.getObject(1);
/* Now you can iterate through the ResultSet in the same way as
for any other JDBC ResultSet */
while (rset.next())
/* Fetch the values from your REF CURSOR here */
mystatement.close();
There may be better ways to do this, but it works for me.
Regards,
Chris I've put in a few more details above. Sorry I can't copy in a
whole chunk of code for you, but this should be enough to get
you started. I would recommend the Wrox Press book on
application programming with Oracle 8i, as it includes lots of
examples of many different tools for Oracle 8i e.g. JDBC, EJB,
BC4J, Portal, XML etc.
Good luck,
Chris