动态使用存储过程给分区表建立分区_动态分区存储管理

in varchar2,
                                           v_tablespace_name_in in varchar2,
                                           v_begin_date         in varchar2,
                                           v_end_date           in varchar2) is
  
   -- Local variables here
   ---分区表信息
   cursor cur_utp(v_table_name in user_tab_partitions.table_name%TYPE) is
     select *
       from (select utp.table_name,
                    utp.tablespace_name,
                    utp.partition_name,
                    utp.high_value,
                    utp.high_value_length,
                    utp.partition_position
               from user_tab_partitions utp
              where utp.table_name = UPPER(v_table_name)
              order by utp.partition_position desc) utp
      v_high_value         varchar2(255); --less than value信息
   v_partition_max_date timestamp; ----less than value信息的 timestamp表示形式
   v_sqlexec            VARCHAR2(2000); --DDL语句变量
   v_count              number := 0;
   v_interver           number := 1; --步长间隔 单位(天)
   v_part_name_header   varchar2(20) := 'p';
   v_part_name          varchar2(2000); --分区名
   v_partition_num      number := 0;
   v_tablespace_name    varchar2(200);
   v_end_date_inner     timestamp;
   
 begin
   v_interver         := 1 ;
   v_end_date_inner := trunc(to_timestamp(v_end_date,
                                          'syyyy-mm-dd hh24:mi:ss.ff'));
   --取值
   for utp in cur_utp(v_table_name) loop
     v_high_value         := substr(utp.high_value,
                                    11,
                                    10);
     v_partition_max_date := to_timestamp(v_high_value,
                                          'syyyy-mm-dd hh24:mi:ss.ff');
     if (to_timestamp(v_begin_date, 'syyyy-mm-dd hh24:mi:ss.ff') >
        v_partition_max_date) then
       v_partition_max_date := to_timestamp(v_begin_date,
                                            'syyyy-mm-dd hh24:mi:ss.ff');
     end if;
     v_part_name := utp.partition_name;
   
     --如果没有给默认值
     if (v_tablespace_name_in is null) then
       -- v_tablespace_name
       v_tablespace_name := utp.tablespace_name;
     else
       v_tablespace_name := v_tablespace_name_in;
     end if;
   if (v_part_name_header =
      substr(v_part_name, 1, length(v_part_name_header))) then
     v_partition_num := to_number(substr(v_part_name,
                                         length(v_part_name_header) + 1,
                                         length(v_part_name)));
     v_partition_num := to_number(to_char(to_date(v_partition_num,'yyyymmdd')+1,'yyyymmdd'));
   else
     dbms_output.put_line('not expect part_name header user default:' ||
                          v_part_name);
     v_partition_num := 0;
   i                    := 0;
   v_partition_max_date := v_partition_max_date + v_interver;
  
  while v_partition_max_date <= v_end_date_inner loop
     
     v_SqlExec := 'ALTER TABLE ' || v_table_name || ' ADD PARTITION ' ||
                  v_part_name_header || (to_number(to_char(to_date(v_partition_num,'yyyymmdd')+i,'yyyymmdd'))) ||
                  ' values less than(TIMESTAMP''' ||
                  to_char(v_partition_max_date, 'syyyy-mm-dd hh24:mi:ss.ff') ||
                  ''') TABLESPACE ' || v_tablespace_name;
     dbms_output.put_line('创建 表分区' || i || '=' || v_SqlExec);
     --alter table IP_CONNRATE_LIMITEX_LOG add partition part_0002 values less than(TIMESTAMP'2010-08-31 00:00:00.000000') tablespace NASP_IP_LOG_TABLESPACE;
     DBMS_Utility.Exec_DDL_Statement(v_SqlExec);
     v_partition_max_date := v_partition_max_date + v_interver;
     i                    := i + 1;
   
   end loop;
   
   v_count := v_count + i;
   end add_partition;