Recursive select in user_constraints

Question

I have 5 tables (or more) in master detail relation (five levels). Is possible to write recursive select cross user_constraints table to get all this levels from select?
my wrong try:
select table_name,R_CONSTRAINT_NAME,CONSTRAINT_NAME from user_constraints a
where a.R_CONSTRAINT_NAME is not null
connect by prior a.CONSTRAINT_NAME=a.r_CONSTRAINT_NAME start with a.R_CONSTRAINT_NAME='ZMPTDOPO_PK';

Answer 1

Something like this ?
SQL> select table_name,constraint_name, r_constraint_name
  2  from user_constraints
  3* order by table_name
SQL> /
TABLE_NAME                     CONSTRAINT_NAME                R_CONSTRAINT_NAME
TABLE1                         TABLE1_PK
TABLE2                         TABLE2_PK
TABLE2                         TABLE2_FK                      TABLE1_PK
TABLE3                         TABLE3_PK
TABLE3                         TABLE3_FK                      TABLE2_PK
TABLE4                         TABLE4_PK
TABLE4                         TABLE4_FK                      TABLE3_PK
TABLE5                         TABLE5_PK
TABLE5                         TABLE5_FK                      TABLE4_PK
9 rows selected.
SQL> col lev for a10
SQL> select lpad(level,level,' ') lev, parent_table, child_table
  2  from (select a.table_name child_table, b.table_name parent_table
  3  from user_constraints a, user_constraints b
  4  where a.r_constraint_name = b.constraint_name)
  5  start with parent_table = 'TABLE1'
  6* connect by prior child_table = parent_table
SQL> /
LEV        PARENT_TABLE                   CHILD_TABLE
1          TABLE1                         TABLE2
2         TABLE2                         TABLE3
  3        TABLE3                         TABLE4
   4       TABLE4                         TABLE5
SQL>