2026-03-12 20:23:15

tpt/demos/tom_kyte_unindexed_fk.sql

@@ -0,0 +1,43 @@
+-- Tom Kyte's script: http://tkyte.blogspot.com/2009/10/httpasktomoraclecomtkyteunindex.html
+
+COL child_table_name FOR A30
+COL child_constraint_name FOR A30
+COL fk_columns FOR A100 WORD_WRAP
+
+select table_name child_table_name, constraint_name child_constraint_name,
+     cname1 || nvl2(cname2,','||cname2,null) ||
+     nvl2(cname3,','||cname3,null) || nvl2(cname4,','||cname4,null) ||
+     nvl2(cname5,','||cname5,null) || nvl2(cname6,','||cname6,null) ||
+     nvl2(cname7,','||cname7,null) || nvl2(cname8,','||cname8,null) fk_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
+         )
+/
+