查找外键未创建索引

select table_name,constraint_name,
nvl2(cname3,','||cname3,null)||nvl2(cname4,','||cname4,null)||
nvl2(cname5,','||cname5,null)||nvl2(cname6,','||cname6,null)||
nvl2(cname7,','||cname7,null)||nvl2(cname8,','||cname8,null)
columns
from (select b.table_name,b.constraint_name,
max(decode(position,1,column_name,null)) cname1,
max(decode(position,2,column_name,null)) cname2,
max(decode(position,3,column_name,null)) cname3,
max(decode(position,4,column_name,null)) cname4,
max(decode(position,5,column_name,null)) cname5,
max(decode(position,6,column_name,null)) cname6,
max(decode(position,7,column_name,null)) cname7,
max(decode(position,8,column_name,null)) cname8,
count(*) col_cnt
from (select substr(table_name,1,30) table_name,
             substr(constraint_name,1,30) constraint_name,
             substr(column_name,1,30) column_name,
            position
       from user_cons_columns) a,
      user_constraints b
where a.constraint_name=b.constraint_name
and b.constraint_type='R'
group by b.table_name,b.constraint_name ) cons
where col_cnt> ALL (
select count(*) from user_ind_columns i where i.table_name=cons.table_name and i.column_name in (cname1,cname2,cname3,cname4,
cname5,cname6,cname7,cname8)
and i.column_position<= cons.col_cnt
group by i.index_name );