How to find out child tables given a parent table /parent's constraint_nam

Question

Hi
I need to disable a primary key but is not able to becoz of referential constraint
select child_constraint.table_name, child_constraint.constraint_name, child_detail.column_name
from user_cons_columns child_detail
join user_constraints child_constraint
on child_detail.constraint_name = child_detail.constraint_name
and child_detail.owner = child_detail.owner
and child_detail.table_name= child_detail.table_name
where child_constraint.constraint_type='R'
and child_constraint.status='ENABLED'
and child_constraint.r_constraint_name='SUBSCRIBER_PK';
and child_detail.table_name='ADDRESS_BOOK_GROUP';
Given a table name how would I know all the child tables and the child tables' columns referencing the parent keys?
thanks

Answer 1

thanks for the reply
while the first query is correct
select child_constraints.table_name child_table_name, child_detail.constraint_name child_constraint_name
, child_detail.column_name child_column_name, child_constraints.constraint_type child_constraint_type
, child_constraints.status, parent_constraints.table_name parent_table_name, parent_detail.column_name parent_column_name
, parent_constraints.constraint_name parent_constraint_name
, parent_constraints.status parent_constraint_status from
user_cons_columns child_detail
join user_constraints child_constraints
on child_detail.constraint_name=child_constraints.constraint_name
and child_detail.owner=child_constraints.owner
and child_detail.table_name=child_constraints.table_name
join user_constraints parent_constraints
on parent_constraints.constraint_name=child_constraints.r_constraint_name
join user_cons_columns parent_detail
on parent_detail.constraint_name=parent_constraints.constraint_name
and parent_detail.owner=parent_constraints.owner
and parent_detail.table_name=parent_constraints.table_name
where
child_constraints.r_constraint_name in (
select constraint_name from user_constraints parent_constraint
where parent_constraint.constraint_type='P'
and parent_constraint.status='ENABLED'
and parent_constraint.table_name='SUBSCRIBER'
and child_constraints.constraint_type='R'
and parent_constraints.constraint_type='P'
--and child_constraints.status='ENABLED'
order by child_constraints.table_name
, child_detail.position
the second query return a lots of garbage why is this so?
select child_constraints.table_name child_table_name, child_detail.constraint_name child_constraint_name
, child_detail.column_name child_column_name, child_constraints.constraint_type child_constraint_type
, child_constraints.status, parent_constraints.table_name parent_table_name, parent_detail.column_name parent_column_name
, parent_constraints.constraint_name parent_constraint_name
, parent_constraints.status parent_constraint_status from
user_cons_columns child_detail
join user_constraints child_constraints
on child_detail.constraint_name=child_constraints.constraint_name
and child_detail.owner=child_constraints.owner
and child_detail.table_name=child_constraints.table_name
join user_constraints parent_constraints
on parent_constraints.constraint_name=child_constraints.r_constraint_name
join user_cons_columns parent_detail
on parent_detail.constraint_name=parent_constraints.constraint_name
and parent_detail.owner=parent_constraints.owner
and parent_detail.table_name=parent_constraints.table_name
where
child_constraints.constraint_type='R'
and parent_constraints.constraint_type='P'
--and child_constraints.status='ENABLED'
order by child_constraints.table_name
, child_detail.position
thanks