Copy hiearchical data using SQL only.

Question

Is there anyway to copy hiearchical data that use ID's without using a pl/sql loop procedure or a global temporary table?
Example
CREATE TABLE DUCK_TREE
FIRST_NAME VARCHAR2(100 BYTE),
LAST_NAME VARCHAR2(100 BYTE),
FAMILY_ID NUMBER,
PARENT_ID NUMBER
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Louie', 'Duck', 207, 203);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Dewey', 'Duck', 206, 203);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Huey', 'Duck', 205, 203);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Donald', 'Duck', 204, 201);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Thelma', 'Duck', 203, 201);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Daphne', 'Duck', 202, 200);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Quackmore', 'Duck', 201, 200);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Grandma', 'Duck', 200, NULL);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Hortense', 'McDuck', 103, 100);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Scrooge', 'McDuck', 102, 100);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Matilda', 'McDuck', 101, 100);
INSERT INTO DUCK_TREE ( FIRST_NAME, LAST_NAME, FAMILY_ID, PARENT_ID ) VALUES (
'Scotty', 'McDuck', 100, NULL);
COMMIT;
Now you would like to copy the hierachical data starting say at Grandma and all children?

Answer 1

I can't really see a way to get away from iterative PL/SQL or the use of temporary tables (global or otherwise).
The best solution I've managed to come up with so far is use at least 1 GTT to store a mapping of current FAMILY_IDs to new FAMILY_IDs, then use the map table to translate the old IDs to new IDs during the copy phase.
DROP TABLE id_map;
CREATE global TEMPORARY TABLE ID_MAP
    (   old_id NUMBER,
        new_id NUMBER
    ON COMMIT DELETE ROWS;
DROP SEQUENCE duck_tree_seq;
CREATE SEQUENCE duck_tree_seq INCREMENT BY 1
    START WITH 208;
create or replace procedure ADD_DUCK_WITH_DESCENDENTS
      (fName varchar2, lName varchar2, pid number, RootID number) is
    new_id NUMBER;
begin
    -- Create new Ancestor
    insert into duck_tree values (fname, lname, duck_tree_seq.nextval, pid)
    returning family_id into new_id;
    -- Add root mapping
    insert into id_map values (rootid, new_id);
    -- Map lineage
    INSERT INTO id_map
    WITH t AS
         SELECT d.*
           FROM duck_tree d
          WHERE level <> 1 -- exclude root ancestor
        CONNECT BY d.parent_id = PRIOR d.family_id
          START WITH d.first_name = 'Grandma'
     SELECT family_id, DUCK_TREE_SEQ.nextval newid FROM t;
    -- Copy descendents
    insert into duck_tree (
        first_name,
        last_name,
        family_id,
        parent_id)
    WITH t AS
        (SELECT d.*
           FROM duck_tree d
          WHERE level <> 1 -- exclude root ancestor
        CONNECT BY d.parent_id = PRIOR d.family_id
          START WITH d.first_name = 'Grandma'
     SELECT t.first_name
          , t.last_name
          , m1.NEW_ID
          , m2.NEW_ID
       FROM t
    JOIN id_map m1
         ON t.family_id = m1.old_id
    LEFT JOIN id_map m2
         ON t.parent_id = m2.old_id;
    -- Clear out the map table
    delete from id_map;
end;
call add_duck_with_descendents('Grandpa','Duck',null,200);
/