Oracle Split Partitions

1. 创建分离分区的存储过程

CREATE OR REPLACE Procedure SP_Split_Partition(

v_table_name_in         in varchar2,

v_part_name_prifex_in   in varchar2,

v_split_partition_source_in in varchar2,

v_tablespace_name_in in varchar2,

v_field_tablespace_name_in in varchar2,

v_create_partition_count_in in number

) is

  /*

      名称：SP_Split_Partition

      描述：oracle分区表分离分区的存储过程

      参数说明：

          v_table_name_in                   分区表表名称

          v_part_name_prifex_in             分区名称前缀

          v_split_partition_source_in       要分离的目标分区

          v_tablespace_name_in in           分区表所在表空间

          v_field_tablespace_name_in        特别字段特别分区SQL

          v_create_partition_count_in       从现在开始创建多少个分区

  */

  -- Local variables here

  i integer;



  ---最后一个分区信息

  cursor cur_utp(v_table_name_in 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_in)

             and utp.high_value_length<>8

             order by utp.partition_position desc

            ) utp

     where rownum = 1;



  v_high_value         varchar2(255); --less than value信息

  v_partition_max_date date; ---- 当前最大分区

  v_sqlexec            VARCHAR2(2000); --DDL语句变量

  v_count              number := 0;

  v_interver           number := 1; --步长间隔 单位(月)

  v_tablespace_name    varchar2(200);

  

  v_max_date_this_time date;



begin

  -- 根据v_create_partition_count_in, 得到最后要生成的分区日期

  v_max_date_this_time:=last_day(add_months(trunc(SYSDATE), v_create_partition_count_in))+1;

  

  --取值

  for utp in cur_utp(v_table_name_in) loop

    v_high_value := substr(utp.high_value,11,10);

    v_partition_max_date := to_date(v_high_value,'YYYY-MM-DD');

    

    dbms_output.put_line('v_high_value:' || v_high_value);



    --如果没有给默认值

    if (v_tablespace_name_in is null) then

      v_tablespace_name := utp.tablespace_name;

    else

      v_tablespace_name := v_tablespace_name_in;

    end if;

  end loop;



  i:= 0;

  v_partition_max_date := add_months(v_partition_max_date,v_interver);



 /************************************************************

  alter table Article_Detail split partition Article_Detail_Others at(TO_DATE('2014-01-01', 'yyyy-mm-dd'))

  into(

     partition Article_Detail_201401 LOB (CONTENT_HTML) store as SECUREFILE (TABLESPACE wm_article_detail_clob) tablespace WM_ARTICLE_DETAIL,

     partition Article_Detail_Others LOB (CONTENT_HTML) store as SECUREFILE (TABLESPACE wm_article_detail_clob) tablespace WM_ARTICLE_DETAIL

  );

 *************************************************************/



  while v_partition_max_date <= v_max_date_this_time loop

    v_SqlExec := 'ALTER TABLE ' || v_table_name_in || ' SPLIT PARTITION ' || v_split_partition_source_in || ' AT' ||

                 '(TO_DATE('''||to_char(v_partition_max_date, 'YYYY-MM-DD')||''',''YYYY-MM-DD'')) INTO(PARTITION '||                 

                 v_part_name_prifex_in || to_char(v_partition_max_date,'YYYYMM') || ' ' || v_field_tablespace_name_in ||

                 ' TABLESPACE '  || v_tablespace_name || ', PARTITION '||v_split_partition_source_in||')';

    dbms_output.put_line('Added Partition ' || i || '=' || v_SqlExec);

    DBMS_Utility.Exec_DDL_Statement(v_SqlExec);

    v_partition_max_date := add_months(v_partition_max_date,v_interver);

    i:= i + 1;

  end loop;



  v_count := v_count + i;

  dbms_output.put_line('Added Partition Count:' || v_count);

  

  commit;

Exception

  when OTHERS then

    --ReturnValue:=-1003;

    dbms_output.put_line('The SQLCode is: '||SQLCODE);

    dbms_output.put_line('The SQLERRM is: '||SQLERRM);



end SP_Split_Partition;

2. 创建调度分离分区的存储过程

CREATE OR REPLACE Procedure SP_Call_SP_Split_Partition is

begin

  

  update Article_Detail t set t.transfer_done_time=t.extracted_time where t.transfer_done_time is null;

  commit;

  

  dbms_stats.gather_table_stats('WDM_APP','ARTICLE_DETAIL',partname=>'ARTICLE_DETAIL_OTHERS');



  SP_Split_Partition(

  'ARTICLE_DETAIL',

  'ARTICLE_DETAIL_',

  'ARTICLE_DETAIL_OTHERS',

  'WM_ARTICLE_DETAIL',

  'LOB (CONTENT_HTML) store as SECUREFILE (TABLESPACE wm_article_detail_clob)',

  3

  );



  SP_Split_Partition(

  'ARTICLE_DATA',

  'ARTICLE_DATA_',

  'ARTICLE_DATA_OTHERS',

  'WM_ARTICLE_DATA',

  '',

  3

  );



Exception

  when OTHERS then

    --ReturnValue:=-1003;

    dbms_output.put_line('The SQLCode is: '||SQLCODE);

    dbms_output.put_line('The SQLERRM is: '||SQLERRM);



end SP_Call_SP_Split_Partition;

3. 创建相应的JOB, 并执行.

CREATE OR REPLACE PROCEDURE Job_SP_Call_SP_Split_Partition AS

 JobNo user_jobs.job%TYPE;

BEGIN

  begin

     dbms_job.submit(JobNo, 'begin SP_Call_SP_Split_Partition; end;',

     SYSDATE+1/1440,'TRUNC(SYSDATE+15)');

     COMMIT;

  end;

END;

/



call Job_SP_Call_SP_Split_Partition();