On Apr 17, 10:45*am, "fitzjarr...@cox.net" <orat...@msn.com> wrote:
> On Apr 17, 10:09*am, "Chris L." <diver...@uol.com.ar> wrote:
>
>
>
>
>
> > On Apr 16, 6:43 pm, Urs Metzger <u...@ursmetzger.de> wrote:
>
> > > fitzjarr...@cox.net schrieb:
>
> > > > On Apr 16, 2:21 pm, "Shakespeare" <what...@xs4all.nl> wrote:
> > > >> "fitzjarr...@cox.net" <orat...@msn.com> schreef in berichtnews:57056886-02e4-4188-9b29-b7ddf517bbb7@a70g2000hsh.googlegroups.com...
> > > >> On Apr 16, 12:16 pm, "Chris L." <diver...@uol.com.ar> wrote:
>
> > > >>> Hi all,
> > > >>> I thought this would be easy but it's turning out to be pretty
> > > >>> difficult.
> > > >>> I need a hierarchical query to omit nodes present in a EXCLUDED_NODES
> > > >>> table.
> > > >>> Omitted nodes' children should be omitted too.
> > > >>> See this example taken
> > > >>> fromhttp://download.oracle.com/docs/cd/B10501_01/server.920/a96540/functi...
> > > >>> SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name, '/')
> > > >>> "Path"
> > > >>> FROM employees
> > > >>> START WITH last_name = 'Kochhar'
> > > >>> CONNECT BY PRIOR employee_id = manager_id;
> > > >>> Path
> > > >>> ---------------------------------------------------------------
> > > >>> /Kochhar
> > > >>> /Kochhar/Greenberg
> > > >>> /Kochhar/Greenberg/Faviet
> > > >>> /Kochhar/Greenberg/Chen
> > > >>> /Kochhar/Greenberg/Sciarra
> > > >>> /Kochhar/Greenberg/Urman
> > > >>> /Kochhar/Greenberg/Popp
> > > >>> /Kochhar/Whalen
> > > >>> /Kochhar/Mavris
> > > >>> /Kochhar/Baer
> > > >>> /Kochhar/Higgins
> > > >>> /Kochhar/Higgins/Gietz
> > > >>> If I have Greenberg in EXCLUDED_NODES then output should be
> > > >>> Path
> > > >>> ---------------------------------------------------------------
> > > >>> /Kochhar
> > > >>> /Kochhar/Whalen
> > > >>> /Kochhar/Mavris
> > > >>> /Kochhar/Baer
> > > >>> /Kochhar/Higgins
> > > >>> /Kochhar/Higgins/Gietz
> > > >>> Excluded node can be in any depth of the hierarchy (i.e. it could be
> > > >>> Gietz and then Gietz and all of its dependent sub-tree should be
> > > >>> pruned)
> > > >>> I've tried filtering the START WITH and works great but doesn't help
> > > >>> when the excluded node is somewhere deep in the hierarchy.
> > > >>> I've tried filtering the CONNECT BY but it cannot contain subqueries
> > > >>> (manual states this).
> > > >>> I've tried using the SYS_CONNECT_BY_PATH to parse it and see if it
> > > >>> contains an excluded node but I got an Ora-00600 error.
> > > >>> ORA-00600: internal error code, arguments: [rworupo.2], [26670], [1],
> > > >>> [], [], [], [], []
> > > >>> Oracle version is 9i
> > > >>> Thanks in advance!
> > > >>> Chris
> > > >> Why wouldn't this work:
>
> > > >> -- Your original example
> > > >> SQL> SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name, '/')
> > > >> "Path"
> > > >> * 2 * * FROM employees
> > > >> * 3 * * START WITH last_name = 'Kochhar'
> > > >> * 4 * * CONNECT BY PRIOR employee_id = manager_id;
>
> > > >> Path
> > > >> ---------------------------------------------------------------------------***-----
> > > >> */Kochhar
> > > >> * */Kochhar/Greenberg
> > > >> * * */Kochhar/Greenberg/Faviet
> > > >> * * */Kochhar/Greenberg/Chen
> > > >> * * */Kochhar/Greenberg/Sciarra
> > > >> * * */Kochhar/Greenberg/Urman
> > > >> * * */Kochhar/Greenberg/Popp
> > > >> * */Kochhar/Whalen
> > > >> * */Kochhar/Mavris
> > > >> * */Kochhar/Baer
> > > >> * */Kochhar/Higgins
> > > >> * * */Kochhar/Higgins/Gietz
>
> > > >> 12 rows selected.
>
> > > >> -- 'Filtered' example
> > > >> SQL> select "Path"
> > > >> * 2 *from
> > > >> * 3 *(SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name,
> > > >> '/') *"Path"
> > > >> * 4 * * FROM employees
> > > >> * 5 * * START WITH last_name = 'Kochhar'
> > > >> * 6 * * CONNECT BY PRIOR employee_id = manager_id)
> > > >> * 7 *where instr("Path", 'Greenberg') = 0;
>
> > > >> Path
> > > >> ---------------------------------------------------------------------------***-----
> > > >> */Kochhar
> > > >> * */Kochhar/Whalen
> > > >> * */Kochhar/Mavris
> > > >> * */Kochhar/Baer
> > > >> * */Kochhar/Higgins
> > > >> * * */Kochhar/Higgins/Gietz
>
> > > >> 6 rows selected.
>
> > > >> SQL>
>
> > > >> David Fitzjarrell
>
> > > >> --------------------------------
> > > >> This will go wrong if you want to exclude 'Green' but include 'Greenberg'
>
> > > >> Shakespeare- Hide quoted text -
>
> > > >> - Show quoted text -
>
> > > > A valid concern. *I must admit this was a quick and dirty attempt.
>
> > > > And this is with 10.2.0.3.
>
> > > > David Fitzjarrell
>
> > > SQL> create table excluded_nodes(last_name varchar2(25));
>
> > > Tabelle wurde erstellt.
>
> > > SQL> insert into excluded_nodes values('Greenberg');
>
> > > 1 Zeile wurde erstellt.
>
> > > SQL> commit;
>
> > > SQL> SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name, '/') "Path"
> > > * *2 * * FROM (select *
> > > * *3 * * * * * * from employees
> > > * *4 * * * * * *where last_name not in (select last_name
> > > * *5 * * * * * * * * * * * * * * * * * * *from excluded_nodes))
> > > * *6 * * START WITH last_name = 'Kochhar'
> > > * *7 * * CONNECT BY PRIOR employee_id = manager_id;
>
> > > Path
> > > ---------------------------------------------------------------------------**-----
> > > * /Kochhar
> > > * * /Kochhar/Whalen
> > > * * /Kochhar/Mavris
> > > * * /Kochhar/Baer
> > > * * /Kochhar/Higgins
> > > * * * /Kochhar/Higgins/Gietz
>
> > > hth,
> > > Urs Metzger
>
> > Thanks Urs, working with a filtered subset and then applying the
> > "connect by" to it is a good idea.
> > Since I would work with employee_id to exclude, do you think it would
> > be best to filter out both employee_id and manager_id? Or is this a
> > non-issue?
>
> > What do you think of this...? sorry about the column name "last_name",
> > it would really contain ids.
>
> > > SQL> SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name, '/') "Path"
> > > * *2 * * FROM (select *
> > > * *3 * * * * * * from employees
> > > * *4 * * * * * *where not exists (select *
> > > * *5 * * * * * * * * * * * * * * * * * * *from excluded_nodes where last_name in (employee_id, manager_id) ))
> > > * *6 * * START WITH last_name = 'Kochhar'
> > > * *7 * * CONNECT BY PRIOR employee_id = manager_id;
>
> > Appreciate it!
> > Chris- Hide quoted text -
>
> > - Show quoted text -
>
> Your modification won't work; *the id values won't ever match up to
> the associated name and, in this example, you have no employee_id
> column in the excluded_nodes table:
>
> SQL> select *
> * 2 *from employees
> * 3 *where not exists (select *
> * 4 * * * * * * * * * *from excluded_nodes where last_name in
> (employee_id, manager_id) );
> * * * * * * * * * from excluded_nodes where last_name in(employee_id,
> manager_id) )
> * * * * * * * * * * * * * * * * * * * * * * *
> ERROR at line 4:
> ORA-01722: invalid number
>
> The query supplied works as expected; if you're having trouble
> 'translating' it to your specific case then post *your query and
> someone here can help you with the rewrite.
>
> David Fitzjarrell- Hide quoted text -
>
> - Show quoted text -

Modifying your suggestion slightly produces the incorrect output:

SQL> SELECT LPAD(' ', 2*level-1)||SYS_CONNECT_BY_PATH(last_name, '/')
"Path"
2 FROM (select *
3 from employees e
4 where not exists (select *
5 from excluded_nodes where employee_id in
(e.employee_id, e.manager_id) ))
6 START WITH last_name = 'Kochhar'
7 CONNECT BY PRIOR employee_id = manager_id;

Path
--------------------------------------------------------------------------------
/Kochhar
/Kochhar/Greenberg
/Kochhar/Greenberg/Faviet
/Kochhar/Greenberg/Chen
/Kochhar/Greenberg/Sciarra
/Kochhar/Greenberg/Urman
/Kochhar/Greenberg/Popp
/Kochhar/Whalen
/Kochhar/Mavris
/Kochhar/Baer
/Kochhar/Higgins
/Kochhar/Higgins/Gietz

12 rows selected.

I would use the example as posted, and try to modify your original
query in a similar manner.


David Fitzjarrell