普通表分区改造_rename方式

一、需求

配合开发人员，对业务临时表进行分区改造(业务认为的临时表，只需要保留近一月数据，并非oracle临时表类型)

二、如下记录完整过程

开发需求
TS_PM  以time_key分区

.沟通明确方案需求
发现开发提供的分区字段，类型是number,需要按天分区
也就是说，需要达到开发的需求，我们需要创建一年365个小分区(列表，后续维护一年后，也需要添加365个分区)!!!
咨询开发人员分区的目的是啥，发现只是为了删除数据快一点，业务上的临时表，只存储1个月的数据，并且分区字段可以改，
不一定需要time_key number,也可以是start_time,这样就可以尝试使用11g新特效扩展分区，也就是所我创建一个分区表，根据插入的数据，自动间隔1天添加新分区，运维省事了。

沟通明确后，整体干活的思路有了：
1)创建分区表,字段进行分区改造
2)插入开发人员需要的数据,本次只需要10月1日后的数据
3)rename 旧表,rename 新分区表至业务表名称，达到分区改造的目的
4)业务测试读写无异常后,进行后续处理,创建分区本地索引、表的列注释信息、表的约束信息
5)对历史旧表，进行expdp导出备份后，drop删除清理回收空间

.操作步骤
2.1 创建分区表
SQL>select  start_time,count(*) from TS_PM sample block()
 group by start_time order by  ;
 查询确认分区字段查询出的数值，简要查询
 --   xxx
 确认分区字段类型
 START_TIME  DATE列 ，间隔日分区。

 使用11g新特效，
 https://www.cnblogs.com/yuxiaole/p/9809294.html
 NUMTODSINTERVAL(, 'day')
 创建间隔分区语法
 【
create table test_part
(
   ID NUMBER() not null,
   REMARK VARCHAR2(),
   create_time DATE
)
PARTITION BY RANGE (CREATE_TIME) INTERVAL (NUMTODSINTERVAL(, 'day'))
(partition part_t01 values less than(to_date('2018-11-12', 'yyyy-mm-dd')));】

-- Create table
实际开发人员提出需要10月1日后续的数据(本次配置第一个分区是9月30日,用于存储历史数据保留一个分区)
create table TS_PM_tmp
(
  power_cons_monitor_id          VARCHAR2( CHAR) not null,
  start_time                     DATE,
  end_time                       DATE,
  time_key                       NUMBER() not null,
·······
)
tablespace BSP
  PARTITION BY RANGE (start_time) INTERVAL (NUMTODSINTERVAL(, 'day'))
(partition part_t01 values less than(to_date('2019-09-30', 'yyyy-mm-dd')))
;

插入数据

insert into TS_tmp select * from TS_PM where time_key='20191001';
insert into TS_tmp select * from TS_PM where time_key='20191002';
insert into TS_tmp select * from TS_PM where time_key='20191003';
insert into TS_tmp select * from TS_PM where time_key='20191004';
insert into TS_tmp select * from TS_PM where time_key='20191005';
insert into TS_tmp select * from TS_PM where time_key in('20191006','20191007','20191008','20191009','20191010');
insert into TS_tmp select * from TS_PM where time_key
in('20191011','20191012','20191013','20191014','20191015','20191016','20191017');
commit;

Rename操作
alter table TS_PM rename to TS_old;
alter table TS_tmp rename to TS_PM;

业务人员反馈无异常后。

创建索引
名称更换后，加上local参数即可
create index BSP.POWER_CONS_MONITOR_PM_5_new on bsp.TS_PM
(START_TIME, STATS_CYCLE, OBJ_TYPE, ORG_ID, OIL_AMOUNT_DIFF, GAS_AMOUNT_DIFF, ELEC_AMOUNT_DIFF)
  tablespace BSP
 local;
添加主键约束
报错
ORA-
, , "partitioning columns must form a subset of key columns of a UNIQUE index"
*Cause: User attempted to create a UNIQUE partitioned index whose
partitioning columns do not form a subset of its key columns
which is illegal
*Action: If the user, indeed, desired to create an index whose
partitioning columns do not form a subset of its key columns,
it must be created as non-UNIQUE; otherwise, correct the
list of key and/or partitioning columns to ensure that the index'
partitioning columns form a subset of its key columns
唯一索引中无分区列，无法创建唯一索引，因此修改主键约束列,添加分区列
alter table TS_PM
  add constraint POWER_MONITOR_PM_new primary key (POWER_CONS_MONITOR_ID,START_TIME)
  using index local
  tablespace BSP
;

-- Add comments to the columns
comment on column TS_tmp.time_key
  is '如果是实时统计则该字段无值
如果是日统计该数值20150722
如果是周统计该数值一周的第一天
如果是月统计该数值201507
如果是季度统计该数值是季度的第一个月
如果是年统计该数值2015';

对历史表进行导出备份

$ expdp "'/ as sysdba'" directory=HISDATA
dumpfile=TS_OLD%U.dump
logfile=TS_OLD_20191016.log
tables=bsp.TS_OLD cluster=n parallel=4 COMPRESSION=all
*********************************************************************
Master table "SYS"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
/home/oracle/rmanvplus/hisdata/TS_OLD01.dump
/home/oracle/rmanvplus/hisdata/TS_OLD02.dump
/home/oracle/rmanvplus/hisdata/TS_OLD03.dump
/home/oracle/rmanvplus/hisdata/TS_OLD04.dump

$ mv TS_OLD01.dump TS_OLD01.dump_20191016.bak
$ mv TS_OLD02.dump TS_OLD02.dump_20191016.bak
$ mv TS_OLD03.dump TS_OLD03.dump_20191016.bak
$ mv TS_OLD04.dump TS_OLD04.dump_20191016.bak
SQL> drop table bsp.TS_OLD purge;

校验
SQL>select index_name,PARTITION_NAME,HIGH_VALUE,STATUS,TABLESPACE_NAME from dba_ind_partitions where index_owner='BSP' and index_name='POWER_CONS_MONITOR_PM_5_NEW';
INDEX_NAME PARTITION_NAME HIGH_VALUE STATUS TABLESPACE_NAME
------------------------------ ------------------------------ -------------------------------------------------------------------------------- -------- ------------------------------
POWER_CONS_MONITOR_PM_5_NEW PART_T01 TO_DATE(' 2019-09-30 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25121 TO_DATE(' 2019-10-02 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25122 TO_DATE(' 2019-10-03 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25123 TO_DATE(' 2019-10-04 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25124 TO_DATE(' 2019-10-05 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25125 TO_DATE(' 2019-10-06 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25126 TO_DATE(' 2019-10-07 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25127 TO_DATE(' 2019-10-08 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25128 TO_DATE(' 2019-10-09 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25129 TO_DATE(' 2019-10-10 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25130 TO_DATE(' 2019-10-11 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25131 TO_DATE(' 2019-10-12 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25132 TO_DATE(' 2019-10-13 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25133 TO_DATE(' 2019-10-14 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25134 TO_DATE(' 2019-10-15 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP
POWER_CONS_MONITOR_PM_5_NEW SYS_P25135 TO_DATE(' 2019-10-16 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA USABLE BSP

16 rows selected.
SQL>select TABLE_OWNER,TABLE_NAME,PARTITION_NAME,HIGH_VALUE,TABLESPACE_NAME from dba_tab_partitions where TABLE_OWNER='BSP' and TABLE_NAME='TS_PM';
TABLE_OWNE TABLE_NAME PARTITION_ HIGH_VALUE TABLESPACE
---------- ------------------------------ ---------- -------------------------------------------------------------------------------- ----------
BSP TS_PM PART_T01 TO_DATE(' 2019-09-30 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25041 TO_DATE(' 2019-10-02 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25042 TO_DATE(' 2019-10-03 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25043 TO_DATE(' 2019-10-04 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25044 TO_DATE(' 2019-10-05 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25045 TO_DATE(' 2019-10-06 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25046 TO_DATE(' 2019-10-07 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25047 TO_DATE(' 2019-10-08 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25048 TO_DATE(' 2019-10-09 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25049 TO_DATE(' 2019-10-10 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25050 TO_DATE(' 2019-10-11 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25051 TO_DATE(' 2019-10-12 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25052 TO_DATE(' 2019-10-13 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25053 TO_DATE(' 2019-10-14 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25054 TO_DATE(' 2019-10-15 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP
BSP TS_PM SYS_P25055 TO_DATE(' 2019-10-16 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIA BSP

16 rows selected.