Oracle分区表使用实例

Oracle分区表使用实例：

create or replace procedure bl_partition is
  v_sql       varchar(1024);
  v_count     int;
  v_partname  varchar2(32);
  v_startdate date;
  v_enddate   date := trunc(sysdate) + 1;
begin
  v_sql := 'select count(*) from user_tables where table_name=''BL_TEST''';
  execute immediate v_sql
    into v_count;
  if v_count = 0 then
    v_sql := 'create table bl_test (period date,abcd varchar2(20)) nologging partition by range (period)
    (partition pmax values less than (MAXVALUE) tablespace bl_test)';
    execute immediate v_sql;
  end if;
  v_sql := 'select max(partition_name) from user_tab_partitions where table_name=''BL_TEST'' and partition_name<>''PMAX''';
  execute immediate v_sql
    into v_partname;
  if v_partname is null then
    v_startdate := trunc(sysdate) - 2;
  else
    v_startdate := to_date(substr(v_partname, 2), 'yyyymmdd');
  end if;
  while v_startdate < v_enddate loop
    v_startdate := v_startdate + 1;
    v_partname  := 'p' || to_char(v_startdate, 'yyyymmdd');
    v_sql       := 'alter table bl_test split partition pmax at (to_date(''' ||
                   to_char(v_startdate + 1, 'yyyyymmdd') ||
                   ''',''yyyymmdd'')) into (partition ' || v_partname ||
                   ',partition pmax)';
    execute immediate v_sql;
  end loop;
end bl_partition;