How do I get the range of my latest partition

Question

Hello All,
I have a range partitioned table. I would like to know the value of my latest partition. I tried using
SELECT high_value FROM user_tab_partitions WHERE table_name = 'TBL_NAME' ORDER BY partition_name DESC  but no luck.
I have partitions like
list_cmpgn_201101 values less than 64000
list_cmpgn_201112 values less than 65000
list_cmpgn_201201 values less than 66000.
It should give me 66000. Since that is my latest partition.
Thx
Shank.
Edited by: SamFisher on Feb 2, 2012 10:42 AM

Answer 1

You need to use PL/SQL:
SQL> select  high_value
  2    from  user_tab_partitions
  3    where table_name = 'RANGE_SALES'
  4  /
HIGH_VALUE
TO_DATE(' 1998-04-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1998-07-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1998-10-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1999-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1999-04-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1999-07-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 1999-10-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 2000-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 2000-04-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 2000-07-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
TO_DATE(' 2000-10-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')
HIGH_VALUE
MAXVALUE
12 rows selected.Now:
create or replace
  type DateList
    as
      table of date
declare
    v_DateList DateList := DateList();
    v_max_high_value date;
begin
    for v_rec in (select high_value from user_tab_partitions where table_name = 'RANGE_SALES') loop
      if v_rec.high_value != 'MAXVALUE'
        then
          v_DateList.extend;
          execute immediate 'begin :1 := ' || v_rec.high_value || '; end;'
            using out v_DateList(v_DateList.count);
      end if;
    end loop;
    select  max(column_value)
      into  v_max_high_value
      from  table(v_DateList);
    dbms_output.put_line('Table RANGE_SALES max high value is ' || to_char(v_max_high_value,'MM/DD/YYYY HH24:MI:SS'));
end;
Table RANGE_SALES max high value is 10/01/2000 00:00:00
PL/SQL procedure successfully completed.
SQL>SY.