test=# select dbms_metadata.GET_DDL('table','t1');

         get_ddl         

--------------------------

 CREATE TABLE PUBLIC.T1( +

  ID INTEGER             +

 )                       +

test=# select dbms_metadata.get_index_ddl('ind_t1','public');

                   get_index_ddl                  

---------------------------------------------------

 CREATE INDEX ind_t1 ON public.t1 USING btree (id)+