¿Ve todas las tablas que tienen claves foráneas a cierta columna en una tabla?

Question

¿Esto es posible? En caso afirmativo, ¿cuáles son las tablas involucradas, en algún lugar para investigar?

Answer 1

intentar algo como esto

select uc.table_name 
from sys.user_cons_columns ucc 
join sys.user_constraints uc 
on uc.r_constraint_name = ucc.constraint_name 
where constraint_type = 'R' 
and ucc.table_name = :1 
and ucc.column_name = :2 

donde

:1 = referenced table 
:2 = referenced column 

Answer 2

select * from user_constraints where r_constraint_name =<PK_NAME> 

donde <PK_NAME> es el nombre de la restricción de clave primaria de la columna

Answer 3

Hay dos consultas candidatos que podrían ayudar aquí:

http://www.alberton.info/oracle_meta_info.html

SELECT alc.constraint_name, 
      CASE alc.constraint_type 
      WHEN 'P' THEN 'PRIMARY KEY' 
      WHEN 'R' THEN 'FOREIGN KEY' 
      WHEN 'U' THEN 'UNIQUE' 
      WHEN 'C' THEN 'CHECK' 
      END "constraint_type", 
      alc.DELETE_RULE "on_delete", 
      CASE alc.deferrable WHEN 'NOT DEFERRABLE' THEN 0 ELSE 1 END "deferrable", 
      CASE alc.deferred WHEN 'IMMEDIATE' THEN 1 ELSE 0 END "initially_deferred", 
      alc.search_condition, 
      alc.table_name, 
      cols.column_name, 
      cols.position, 
      r_alc.table_name "references_table", 
      r_cols.column_name "references_field", 
      r_cols.position "references_field_position" 
    FROM all_cons_columns cols 
LEFT JOIN all_constraints alc 
     ON alc.constraint_name = cols.constraint_name 
     AND alc.owner = cols.owner 
LEFT JOIN all_constraints r_alc 
     ON alc.r_constraint_name = r_alc.constraint_name 
     AND alc.r_owner = r_alc.owner 
LEFT JOIN all_cons_columns r_cols 
     ON r_alc.constraint_name = r_cols.constraint_name 
     AND r_alc.owner = r_cols.owner 
     AND cols.position = r_cols.position 
    WHERE alc.constraint_name = cols.constraint_name 
     AND alc.constraint_name = 'TESTCONSTRAINTS_ID_FK' 
     AND alc.table_name = 'TESTCONSTRAINTS2';