Find missing referential constraints

Question

I have a master table that is referenced by many other tables. Unfortunately, many of these child tables have been created without the necessary referential constraint to the parent. How can I easily identify these tables?
The code would be like
select table_name
from tables
where table_column like '%master_column'
and not exists referential constraint on this table_column to the master_table
Has anyone had to do this in the past - do you have an example script?
Thanks
Richard

Answer 1

Here is something I cobbled together that seems to work - its not pretty though...
SELECT *
FROM DBA_TAB_COLUMNS atc,
DBA_OBJECTS allo
WHERE (UPPER(atc.column_name) LIKE :column_name)
AND (atc.owner IN (:owner))
AND (allo.object_name = atc.table_name)
AND (allo.owner = atc.owner)
AND (allo.object_type IN ('TABLE', 'VIEW', 'CLUSTER', 'MATERIALIZED VIEW', 'UNDEFINED'))
AND NOT EXISTS
(SELECT *
FROM (SELECT AO.NAME TABLE_NAME,
AU.NAME OWNER,
BCN.NAME CONSTRAINT_NAME,
DECODE(ac.TYPE#, 4,
DECODE(ac.refact, 1, 'CASCADE', 2, 'SET NULL', 'NO ACTION'),
NULL) delete_rule,
BO.NAME TN, BU.NAME R_OWNER
FROM SYS.CDEF$ BC, SYS.CON$ BCN, SYS.OBJ$ BO, SYS.USER$ BU,
SYS.CON$ BRC, SYS.USER$ BRU, SYS.OBJ$ BRO,
SYS.CDEF$ AC, SYS.CON$ ACN, SYS.OBJ$ AO, SYS.USER$ AU
WHERE BC.CON# = BCN.CON#
AND BC.OBJ# = BO.OBJ#
AND BO.OWNER# = BU.USER#
AND BC.RCON# = BRC.CON#(+)
AND BRC.OWNER# = BRU.USER#(+)
AND BC.ROBJ# = BRO.OBJ#(+)
AND AC.CON# = BC.RCON#
AND AC.CON# = ACN.CON#
AND AO.OBJ# = AC.OBJ#
AND AO.OWNER# = AU.USER#
AND AC.TYPE# IN (2,3)) A,
DBA_CONS_COLUMNS B
WHERE B.TABLE_NAME = A.TN
AND B.CONSTRAINT_NAME = A.CONSTRAINT_NAME
AND B.OWNER = A.R_OWNER
AND b.table_name = atc.table_name
AND b.owner = atc.owner)
Richard