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-- (o) Tom Kyte
set pagesize 999
set long 10000 
select (case 
       when ((select count(*)
              from   dba_users
              where  username = '&&Username') > 0)
       then  dbms_metadata.get_ddl ('USER', '&&Username') 
       else  to_clob ('   -- Note: User not found!')
       end ) Extracted_DDL from dual
UNION ALL
select (case 
       when ((select count(*)
              from   dba_ts_quotas
              where  username = '&&Username') > 0)
       then  dbms_metadata.get_granted_ddl( 'TABLESPACE_QUOTA', '&&Username') 
       else  to_clob ('   -- Note: No TS Quotas found!')
       end ) from dual
UNION ALL
select (case 
       when ((select count(*)
              from   dba_role_privs
              where  grantee = '&&Username') > 0)
       then  dbms_metadata.get_granted_ddl ('ROLE_GRANT', '&&Username') 
       else  to_clob ('   -- Note: No granted Roles found!')
       end ) from dual
UNION ALL
select (case 
       when ((select count(*)
              from   dba_sys_privs
              where  grantee = '&&Username') > 0)
       then  dbms_metadata.get_granted_ddl ('SYSTEM_GRANT', '&&Username') 
       else  to_clob ('   -- Note: No System Privileges found!')
       end ) from dual
UNION ALL
select (case 
       when ((select count(*)
              from   dba_tab_privs
              where  grantee = '&&Username') > 0)
       then  dbms_metadata.get_granted_ddl ('OBJECT_GRANT', '&&Username') 
       else  to_clob ('   -- Note: No Object Privileges found!')
       end ) from dual
/