How to write a hierarchical query so that only the child nodes are displayed?

Hi all

I have a hierarchical query that I use in an area of tree demand APEX and there are nodes that have no children and I am trying to find a way to not display these nodes. Essentially if the user does not have to develop a lot of knots to know that nothing exists at the most detailed level.

The data are based on the Oracle Fusion FND tables but for example purposes here is enough data to illustrate my question:


create table APPL_TAXONOMY_HIERARCHY (SOURCE_MODULE_ID varchar2(30), TARGET_MODULE_ID varchar2(30));
create table APPL_TAXONOMY_TL (module_id varchar2(30), description varchar2(100), user_module_name varchar2(30), language varchar2(5));
create table APPL_TAXONOMY (MODULE_ID    varchar2(30),    MODULE_NAME    varchar2(30), MODULE_TYPE varchar2(10),    MODULE_KEY varchar2(30));
create table TABLES (table_name varchar2(30), module_key varchar2(30));



insert into APPL_TAXONOMY_TL values ('1', null, 'Oracle Fusion', 'US' );
insert into APPL_TAXONOMY_TL values ('2', null, 'Financials', 'US' );
insert into APPL_TAXONOMY_TL values ('3', null, 'Human Resources', 'US' );
insert into APPL_TAXONOMY_TL values ('20', null, 'Accounts Payable', 'US' );
insert into APPL_TAXONOMY_TL values ('10', null, 'General Ledger', 'US' );

insert into APPL_TAXONOMY_HIERARCHY values ('1', 'DDDDDDDD');
insert into APPL_TAXONOMY_HIERARCHY values ('2', '1');
insert into APPL_TAXONOMY_HIERARCHY values ('3', '1');
insert into APPL_TAXONOMY_HIERARCHY values ('4', '1');
insert into APPL_TAXONOMY_HIERARCHY values ('10', '2');
insert into APPL_TAXONOMY_HIERARCHY values ('20', '2');

insert into APPL_TAXONOMY values ('1', 'Fusion', 'PROD', 'Fusion');
insert into APPL_TAXONOMY values ('2', 'Financials', 'FAMILY', 'FIN');
insert into APPL_TAXONOMY values ('10', 'GL', 'APP', 'GL');
insert into APPL_TAXONOMY values ('3', 'Human Resources', 'FAMILY', 'HR');
insert into APPL_TAXONOMY values ('20', 'AP', 'APP', 'AP');

insert into tables values ('GL_JE_SOURCES_TL','GL');
insert into tables values ('GL_JE_CATEGORIES','GL');

My hierarchical query is as follows:

with MODULES as
(
SELECT h.source_module_id, b.user_module_name, h.target_module_id
      FROM APPL_TAXONOMY_HIERARCHY H,
      APPL_TAXONOMY_TL B,
APPL_TAXONOMY VL
where H.source_module_id = b.module_id
and b.module_id = vl.module_id
and vl.module_type not in ('PAGE', 'LBA')
UNION ALL
select distinct table_name, table_name,  regexp_substr(table_name,'[^_]+',1,1) 
from TABLES --needed as a link between TABLES and APPL_TAXONOMY
union all
select module_key as source_module_id, module_name as user_module_name, module_id as target_module_id  from appl_taxonomy VL where VL.module_type = 'APP')
SELECT  case when connect_by_isleaf = 1 then 0
            when level = 1             then 1
            else                           -1
       end as status,
LEVEL,
user_module_name as title,
null as icon,
ltrim(user_module_name, ' ') as value,
null as tooltip,
null as link
      FROM MODULES
      START WITH source_module_id = '1'
      CONNECT BY PRIOR source_module_id = target_module_id
ORDER SIBLINGS BY user_module_name;

In Oracle APEX, this gives a tree with the appropriate data, you can see here:

https://Apex.Oracle.com/pls/Apex/f?p=32581:29 (username: guest, pw: app_1000);

The SQL of the query results are:

STATUSTITLE LEVELVALUE

---------- ---------- ------------------------------ ------------------------------

11 oracle FusionOracle Fusion
-12 financial tablesFinancials
-13 accounts payableAccounts payable
04 APAP
-1General Accounting 3General Accounting
-14 GLGL
05 GL_JE_CATEGORIESGL_JE_CATEGORIES
05 GL_JE_SOURCES_TLGL_JE_SOURCES_TL
02 human resourcesHuman resources

The lowest level is the name of the table to level 5. HR is not any level under level 2, in the same way, "AP" (level 4) has nothing below, i.e. no level 5 and that's why I don't want to show these nodes. Is this possible with the above query?

Thanks in advance for your suggestions!

John

Hello

The following query will include only the nodes of level = 5 and their ancestors (or descendants):

WITH modules LIKE

(

SELECT h.source_module_id

b.user_module_name AS the title

h.target_module_id

To appl_taxonomy_hierarchy:

appl_taxonomy_tl b

appl_taxonomy vl

WHERE h.source_module_id = b.module_id

AND b.module_id = vl.module_id

AND vl.module_type NOT IN ('PAGE', "LBA")

UNION ALL

SELECT DISTINCT

table-name

table_name

, REGEXP_SUBSTR (table_name, ' [^ _] +')

From the tables - required as a link between the TABLES and APPL_TAXONOMY

UNION ALL

SELECT module_key AS source_module_id

AS user_module_name module_name

module_id AS target_module_id

Of appl_taxonomy vl

WHERE vl.module_type = 'APP '.

)

connect_by_results AS

(

SELECT THE CHECK BOX

WHEN CONNECT_BY_ISLEAF = 1 THEN 0

WHEN LEVEL = 1 THEN 1

OF ANOTHER-1

The END as status

LEVEL AS lvl

title

-, NULL AS icon

, LTRIM (title, "") AS the value

-, NULL as ToolTip

-, Link AS NULL

source_module_id

SYS_CONNECT_BY_PATH (source_module_id - or something unique

, ' ~' - or anything else that may occur in the unique key

) || ' ~' AS the path

ROWNUM AS sort_key

Modules

START WITH source_module_id = '1'

CONNECT BY PRIOR Source_module_id = target_module_id

Brothers and SŒURS of ORDER BY title

)

SELECT the status, lvl, title, value

-, icon, tooltip, link

OF connect_by_results m

WHEN THERE IS)

SELECT 1

OF connect_by_results

WHERE the lvl = 5

AND the path AS ' % ~' | m.source_module_id

|| '~%'

)

ORDER BY sort_key

;

You may notice that subqueries modules and the connect_by_results are essentially what you've posted originally.  What was the main request is now called connect_by_results, and it has a couple of additional columns that are necessary in the new main request or the EXISTS subquery.

However, I am suspicious of the 'magic number' 5.  Could you have a situation where the sheets you are interested in can be a different levels (for example, some level = 5 and then some, into another branch of the tree, at the LEVEL = 6, or 7 or 4)?  If so, post an example.  You have need of a Query of Yo-Yo, where you do a bottom-up CONNECT BY query to get the universe of interest, and then make a descendant CONNECT BY query on this set of results.

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