Execute anonymous pl/sql block and get resultset in java

Question

I would like to execute the anonymous PL/SQL and need to get the resultset object. I got the code which can be done by using cursors inside the PL/SQL block.

But the

Answer 1

First off, the code you posted is not valid. An anonymous PL/SQL block cannot return an expression. And no PL/SQL block can return the result of a query like that. You would need to do something like declaring a REF CURSOR and opening that cursor using the various SQL statements.

Since an anonymous PL/SQL block cannot return anything to a caller, the architecture you're describing is a problematic. At a minimum, you'd need to modify the anonymous block so that there was a bind variable that your JDBC code could register. Something like (adapted from an example in Menon's Expert Oracle JDBC Programming (note that I may have introduced some minor syntax errors)

CallableStatement stmt := null;
ResultSet         rset := null;
String            query := 'DECLARE 
                              FUNCTION get_result
                                RETURN SYS_REFCURSOR
                              AS
                                l_rc SYS_REFCURSOR;
                              BEGIN
                                OPEN l_rc 
                                 FOR SELECT DISTINCT fundname d, fundname r
                                       FROM some_table
                                      WHERE some_condition
                                      ORDER BY 1;
                                RETURN l_rc;
                              EXCEPTION
                                WHEN others THEN
                                  OPEN l_rc 
                                   FOR SELECT 'Not Available' d, 'Not Available' r
                                         FROM dual;
                                  RETURN l_rc;
                              END get_result;
                            BEGIN
                              ? := get_result;
                            END;';
try {
  cstmt := conn.prepareCall( query );
  cstmt.registerOutParameter( 1, OracleTypes.CURSOR );
  cstmt.execute();
  rset := (ResultSet) cstmt.getObject( 1 );
}
finally {
  <>
}