Heirarchical Fetch using SQL or enchanced SQL

The mapping of the tables is such that :
Table A - Composite filter [Child Table - holds only the ids]
Table B - Event Filter [Master Table - holds all details about the filter]
Table C - Event Discount
Table D -Tariff element Discount
Table E - Product
Table F - Tariff
Table G - Product Family
1 Composite filter can be associated to 1 or more composite filters. Event filters are associated to the event discount,Event Discounts are associated to product tariffs and Products and Tariffs are associated to product family.
For a Given product family, we wish to fetch all the filters associated, but we are missing out few records where the composite filters are not directly associated to the discounts (i.e. the filters are associated to other filter)
We tried the below query. But this is not giving the expected resultes.
Can some one help me on this. Please write if u require more inputs on this.
select evtfltr.filter_name,
evtfltr.filter_type_id,
evtfltr.filter_desc,
evetyp.event_type_name,
evtfltr.attribute_number,
evtfltr.max_element_count,
evtfltr.match_type
from eventfilter evtfltr,eventtype evetyp
where evtfltr.event_type_id=evetyp.event_type_id(+)
and evtfltr.event_filter_id in (select event_filter_id
from eventfilter
where event_filter_id in (select distinct discounting_filter_id
from eventdiscount
where event_discount_id in (select event_discount_id
from PVTARIFFELEMENTDISCOUNT2
where product_id in (select product_family_id
from productfamily
where product_family_name = '21CN Services Generic')
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 ))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 ))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 )
UNION
select event_filter_id
from compositefilter
where composite_filter_id in (select event_filter_id
from eventfilter
where event_filter_id in (select distinct discounting_filter_id
from eventdiscount
where event_discount_id in (select event_discount_id
from PVTARIFFELEMENTDISCOUNT2
where product_id in (select product_id
from product
where product_family_id= (select product_family_id
from productfamily
where product_family_name = '21CN Services Generic'))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 ))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 ))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 )
and filter_type_id in (4,5)))
and catalogue_change_id IN (Select catalogue_Change_id from cataloguechange where catalogue_status = 3 )

I am been able to fetch the records which are directly associated with the discounts but not the ones which are indirectly associated to the discount.
Table details :
Event Filter ef
Column Name     ID     Pk     Null?     Data Type     Default     Histogram
EVENT_FILTER_ID     1     2     N     NUMBER (9)          Yes
CATALOGUE_CHANGE_ID     2     1     N     NUMBER (9)          Yes
FILTER_NAME     3          N     VARCHAR2 (40 Byte)          Yes
FILTER_TYPE_ID     4          N     NUMBER (9)          Yes
FILTER_DESC     5          Y     VARCHAR2 (255 Byte)          Yes
EVENT_TYPE_ID     6          Y     NUMBER (9)          Yes
ATTRIBUTE_NUMBER     7          Y     NUMBER (2)          Yes
MAX_ELEMENT_COUNT     8          Y     NUMBER (9)          Yes
MATCH_TYPE     9          Y     NUMBER (9)          Yes
Compositefilter cf
Column Name     ID     Pk     Null?     Data Type     Default     Histogram
COMPOSITE_FILTER_ID     1     2     N     NUMBER (9)          Yes
FILTER_NUMBER     2     3     N     NUMBER (9)          Yes
CATALOGUE_CHANGE_ID     3     1     N     NUMBER (9)          Yes
EVENT_FILTER_ID     4          N     NUMBER (9)          Yes
ef.EVENT_FILTER_ID=cf.COMPOSITE_FILTER_ID
cf.FILTER_NUMBER is sequence of filters associated to another filter. 1,2,3,4,5
cf.EVENT_FILTER_ID is associated event filter.
eg
1) One filter name 'A'is associated with discount 'XYZ"
2) filter is 'B','C','D' are associated with Filter 'A' (Composit filter holds this mapping)
We are missing the records for 'B','C','D' .
Will this help and need more clarity.

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>
>
Mike
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