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