oracle 11g 将非分区表转换为分区表在线重定义

Posted 2020-10-10 Alex Zeng

--操作的用户需要有以下的权限
GRANT CONNECT, RESOURCE TO CMIGDW;
GRANT EXECUTE ON DBMS_REDEFINITION TO CMIGDW;
GRANT ALTER ANY TABLE TO CMIGDW;
GRANT DROP ANY TABLE TO CMIGDW;
GRANT LOCK ANY TABLE TO CMIGDW;
GRANT CREATE ANY TABLE TO CMIGDW;
GRANT SELECT ANY TABLE TO CMIGDW;
GRANT CREATE ANY TRIGGER TO CMIGDW;
GRANT CREATE ANY INDEX TO CMIGDW;

--需要分区的表
select * from CMIGDW.TEST_DATE_DIM;

--表结构
create table TEST_DATE_DIM
(
  date_id   NUMBER,
  year_     NUMBER,
  half_year VARCHAR2(20),
  season_id VARCHAR2(20),
  season    VARCHAR2(20),
  month_    NUMBER,
  week      NUMBER
);

--创建一个与TEST_DATE_DIM 表字段相同，但是分区的表
create table TEST_DATE_DIM2
(
  date_id   NUMBER,
  year_     NUMBER,
  half_year VARCHAR2(20),
  season_id VARCHAR2(20),
  season    VARCHAR2(20),
  month_    NUMBER,
  week      NUMBER
) 
PARTITION BY list (month_)
(
    PARTITION P1 values (201501),
    PARTITION P2 values (201502),
    PARTITION P3 values (default)
);

--开始在线重定义
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 
Connected as CMIGDW@CMIG_TEST

SQL> EXEC dbms_redefinition.start_redef_table(‘CMIGDW‘, ‘TEST_DATE_DIM‘, ‘TEST_DATE_DIM2‘);
begin dbms_redefinition.start_redef_table(‘CMIGDW‘, ‘TEST_DATE_DIM‘, ‘TEST_DATE_DIM2‘); end;
ORA-12089: 不能联机重新定义无主键的表 "CMIGDW"."TEST_DATE_DIM"
ORA-06512: 在 "SYS.DBMS_REDEFINITION", line 56
ORA-06512: 在 "SYS.DBMS_REDEFINITION", line 1490
ORA-06512: 在 line 1
需要有主键

--开始执行在线重定义
SQL> EXEC dbms_redefinition.start_redef_table(‘CMIGDW‘, ‘TEST_DATE_DIM‘, ‘TEST_DATE_DIM2‘);
PL/SQL procedure successfully completed

SQL> 
SQL> DECLARE
  2   error_count pls_integer := 0;
  3  BEGIN
  4    dbms_redefinition.copy_table_dependents(‘CMIGDW‘, ‘TEST_DATE_DIM‘, ‘TEST_DATE_DIM2‘,
  5                                            0, true, false, true, false,
  6                                            error_count);
  7  
  8    dbms_output.put_line(‘errors := ‘ || to_char(error_count));
  9  END;
 10  /
PL/SQL procedure successfully completed
--结束在线重定义
SQL> EXEC  dbms_redefinition.finish_redef_table(‘CMIGDW‘, ‘TEST_DATE_DIM‘, ‘TEST_DATE_DIM2‘);
PL/SQL procedure successfully completed

SQL> select * from  TEST_DATE_DIM PARTITION (p1);
SQL> select * from TEST_DATE_DIM2;

-- 删除中间表
DROP TABLE TEST_DATE_DIM2;