Get DDL to create foreign key constraints in Oracle... Wooooo hoo!

gistfile1.sql

select 'alter table ' || source_table || ' add constraint ' || constraint_name || ' foreign key (' || con_columns || ') references ' || target_table || ' (' || ind_columns || ') enable' data 
  from (select constraint_name, source_table, target_index, target_table, con_columns, wm_concat(column_name) ind_columns
          from (select a.constraint_name, a.source_table, a.target_index, b.table_name target_table, a.con_columns, b.column_name, b.column_position
                  from (select a.constraint_name, a.source_table, a.target_index, wm_concat(a.column_name) con_columns
                          from (select a.constraint_name, 
                                       a.table_name source_table, 
                                       a.r_constraint_name target_index, 
                                       b.column_name,
                                       b.position
                                  from user_constraints a
                                 inner join user_cons_columns b on (b.constraint_name = a.constraint_name)
                                 where a.constraint_type = 'R'
                                 order by a.constraint_name, b.position) a
                        group by constraint_name, source_table, target_index) a
                  inner join user_ind_columns b on (b.index_name = a.target_index)
                  order by constraint_name, b.column_position) 
          group by constraint_name, source_table, target_index, target_table, con_columns);

Looks like "wm_concat" used in above sql is a function/procedure is missing. Please post that function/procedure here to execute above sql.

Thanks.