col tabpart_high_value head HIGH_VALUE_RAW for a30

select
    table_owner
  , table_name
  , partition_name
  , subpartition_name
  , high_value         tabpart_high_value
  , high_value_length
  , subpartition_position
From
    dba_tab_subpartitions
where
    upper(table_name) LIKE
                upper(CASE
                    WHEN INSTR('&1','.') > 0 THEN
                        SUBSTR('&1',INSTR('&1','.')+1)
                    ELSE
                        '&1'
                    END
                     )
AND table_owner LIKE
        CASE WHEN INSTR('&1','.') > 0 THEN
            UPPER(SUBSTR('&1',1,INSTR('&1','.')-1))
        ELSE
            user
        END
/
