ORACLE在线重定义
2013-09-07 00:07
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1.创建表
SQL> CREATE TABLE T (ID NUMBER PRIMARY KEY, TIME DATE);
2、插入数据
SQL> INSERT INTO T SELECT ROWNUM, CREATED FROM DBA_OBJECTS;
SQL> COMMIT;
3、在线重定义的表自行验证,看该表是否可以重定义
SQL> EXEC DBMS_REDEFINITION.CAN_REDEF_TABLE(user, 'T', DBMS_REDEFINITION.CONS_USE_PK);
(如果没有定义主键会提示以下错误信息)
begin dbms_redefinition.can_redef_table(user,'pft_party_profit_detail'); end;
ORA-12089: cannot online redefine table "OFSA"."PFT_PARTY_PROFIT_DETAIL" with no primary key
422ORA-06512: at "SYS.DBMS_REDEFINITION", line 8
ORA-06512: at "SYS.DBMS_REDEFINITION", line 247
ORA-06512: at line 1
出错了,该表上缺少主键,为该表建主键,再执行验证.
SQL> alter table t add constraint pk_t primary key(id);
Table altered.
如果报:
ERROR at line 1:
ORA-06550: line 1, column 53:
PLS-00201: identifier 'DBMS_REDEFINITION' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
出错原因是没有赋予‘DBMS_REDEFINITION' 的执行权限。解决的办法是:
dba用户授予权限
SQL> GRANT ALL ON SYS.DBMS_REDEFINITION TO SCOTT;
Grant succeeded.
SQL> GRANT CREATE ANY TABLE, ALTER ANY TABLE, DROP ANY TABLE, LOCK ANY TABLE, SELECT ANY TABLE TO SCOTT;
Grant succeeded.
4、建个和源表表结构一样的分区表,作为中间表。按日期范围分区
CREATE TABLE T_NEW (ID NUMBER PRIMARY KEY, TIME DATE) PARTITION BY RANGE (TIME)
(PARTITION T_2003 VALUES LESS THAN (TO_DATE('2004-1-1', 'YYYY-MM-DD')),
PARTITION T_2004 VALUES LESS THAN (TO_DATE('2005-1-1', 'YYYY-MM-DD')),
PARTITION T_2005 VALUES LESS THAN (TO_DATE('2006-1-1', 'YYYY-MM-DD')),
PARTITION T_2006 VALUES LESS THAN (TO_DATE('2007-1-1', 'YYYY-MM-DD')),
PARTITION T_2007 VALUES LESS THAN (TO_DATE('2008-1-1', 'YYYY-MM-DD')),
PARTITION T_2008 VALUES LESS THAN (TO_DATE('2009-1-1', 'YYYY-MM-DD')),
PARTITION T_2009 VALUES LESS THAN (TO_DATE('2010-1-1', 'YYYY-MM-DD')),
PARTITION T_2010 VALUES LESS THAN (TO_DATE('2011-1-1', 'YYYY-MM-DD')),
PARTITION T_2011 VALUES LESS THAN (TO_DATE('2012-1-1', 'YYYY-MM-DD')),
PARTITION T_2012 VALUES LESS THAN (TO_DATE('2013-1-1', 'YYYY-MM-DD')),
PARTITION T_2013 VALUES LESS THAN (TO_DATE('2014-1-1', 'YYYY-MM-DD')));
5、执行表的在线重定义
SQL> EXEC DBMS_REDEFINITION.START_REDEF_TABLE(USER, 'T', 'T_NEW');
6、执行把中间表的内容和数据源表进行同步。
SQL>execute dbms_redefinition.sync_interim_table(user,'t','t_new');
7、执行结束在线定义过程。
SQL> EXEC DBMS_REDEFINITION.FINISH_REDEF_TABLE(user, 'T', 'T_NEW');
8、查看数据字典,可以看到改表已经成为了分区表
SQL> select a.table_name, a.partition_name from user_tab_partitions a;
T T_2008
T T_2003
T T_2004
T T_2005
T T_2006
T T_2007
T T_2009
T T_2010
T T_2011
T T_2012
T T_2013
SQL> SELECT COUNT(*) FROM T;
45012
SQL> SELECT COUNT(*) FROM T PARTITION (T_2011);
0
SQL> SELECT COUNT(*) FROM T PARTITION (T_2012);
0
SQL> SELECT COUNT(*) FROM T PARTITION (T_2013);
45012
SQL>
9、如果执行在线重定义的过程中出错,可以在执行dbms_redefinition.start_redef_table之后到执行dbms_redefinition.finish_redef_table之前的时间里执行:DBMS_REDEFINITION.abort_redef_table(user, 't', 't_new')以放弃执行在线重定义.
10、如果出现以下错误
SQL> exec dbms_redefinition.can_redef_table(user, 't');
BEGIN dbms_redefinition.can_redef_table(user, 't'); END;
*
ERROR at line 1:
ORA-12091: cannot online redefine table "user"."t" with materialized views
ORA-06512: at "SYS.DBMS_REDEFINITION", line 137
ORA-06512: at "SYS.DBMS_REDEFINITION", line 1478
ORA-06512: at line 1
用这句删除materialized view 即可继续进行
drop materialized view log on ;
drop materialized view log on t;
OR
drop materialized t;
SQL> CREATE TABLE T (ID NUMBER PRIMARY KEY, TIME DATE);
2、插入数据
SQL> INSERT INTO T SELECT ROWNUM, CREATED FROM DBA_OBJECTS;
SQL> COMMIT;
3、在线重定义的表自行验证,看该表是否可以重定义
SQL> EXEC DBMS_REDEFINITION.CAN_REDEF_TABLE(user, 'T', DBMS_REDEFINITION.CONS_USE_PK);
(如果没有定义主键会提示以下错误信息)
begin dbms_redefinition.can_redef_table(user,'pft_party_profit_detail'); end;
ORA-12089: cannot online redefine table "OFSA"."PFT_PARTY_PROFIT_DETAIL" with no primary key
422ORA-06512: at "SYS.DBMS_REDEFINITION", line 8
ORA-06512: at "SYS.DBMS_REDEFINITION", line 247
ORA-06512: at line 1
出错了,该表上缺少主键,为该表建主键,再执行验证.
SQL> alter table t add constraint pk_t primary key(id);
Table altered.
如果报:
ERROR at line 1:
ORA-06550: line 1, column 53:
PLS-00201: identifier 'DBMS_REDEFINITION' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
出错原因是没有赋予‘DBMS_REDEFINITION' 的执行权限。解决的办法是:
dba用户授予权限
SQL> GRANT ALL ON SYS.DBMS_REDEFINITION TO SCOTT;
Grant succeeded.
SQL> GRANT CREATE ANY TABLE, ALTER ANY TABLE, DROP ANY TABLE, LOCK ANY TABLE, SELECT ANY TABLE TO SCOTT;
Grant succeeded.
4、建个和源表表结构一样的分区表,作为中间表。按日期范围分区
CREATE TABLE T_NEW (ID NUMBER PRIMARY KEY, TIME DATE) PARTITION BY RANGE (TIME)
(PARTITION T_2003 VALUES LESS THAN (TO_DATE('2004-1-1', 'YYYY-MM-DD')),
PARTITION T_2004 VALUES LESS THAN (TO_DATE('2005-1-1', 'YYYY-MM-DD')),
PARTITION T_2005 VALUES LESS THAN (TO_DATE('2006-1-1', 'YYYY-MM-DD')),
PARTITION T_2006 VALUES LESS THAN (TO_DATE('2007-1-1', 'YYYY-MM-DD')),
PARTITION T_2007 VALUES LESS THAN (TO_DATE('2008-1-1', 'YYYY-MM-DD')),
PARTITION T_2008 VALUES LESS THAN (TO_DATE('2009-1-1', 'YYYY-MM-DD')),
PARTITION T_2009 VALUES LESS THAN (TO_DATE('2010-1-1', 'YYYY-MM-DD')),
PARTITION T_2010 VALUES LESS THAN (TO_DATE('2011-1-1', 'YYYY-MM-DD')),
PARTITION T_2011 VALUES LESS THAN (TO_DATE('2012-1-1', 'YYYY-MM-DD')),
PARTITION T_2012 VALUES LESS THAN (TO_DATE('2013-1-1', 'YYYY-MM-DD')),
PARTITION T_2013 VALUES LESS THAN (TO_DATE('2014-1-1', 'YYYY-MM-DD')));
5、执行表的在线重定义
SQL> EXEC DBMS_REDEFINITION.START_REDEF_TABLE(USER, 'T', 'T_NEW');
6、执行把中间表的内容和数据源表进行同步。
SQL>execute dbms_redefinition.sync_interim_table(user,'t','t_new');
7、执行结束在线定义过程。
SQL> EXEC DBMS_REDEFINITION.FINISH_REDEF_TABLE(user, 'T', 'T_NEW');
8、查看数据字典,可以看到改表已经成为了分区表
SQL> select a.table_name, a.partition_name from user_tab_partitions a;
T T_2008
T T_2003
T T_2004
T T_2005
T T_2006
T T_2007
T T_2009
T T_2010
T T_2011
T T_2012
T T_2013
SQL> SELECT COUNT(*) FROM T;
45012
SQL> SELECT COUNT(*) FROM T PARTITION (T_2011);
0
SQL> SELECT COUNT(*) FROM T PARTITION (T_2012);
0
SQL> SELECT COUNT(*) FROM T PARTITION (T_2013);
45012
SQL>
9、如果执行在线重定义的过程中出错,可以在执行dbms_redefinition.start_redef_table之后到执行dbms_redefinition.finish_redef_table之前的时间里执行:DBMS_REDEFINITION.abort_redef_table(user, 't', 't_new')以放弃执行在线重定义.
10、如果出现以下错误
SQL> exec dbms_redefinition.can_redef_table(user, 't');
BEGIN dbms_redefinition.can_redef_table(user, 't'); END;
*
ERROR at line 1:
ORA-12091: cannot online redefine table "user"."t" with materialized views
ORA-06512: at "SYS.DBMS_REDEFINITION", line 137
ORA-06512: at "SYS.DBMS_REDEFINITION", line 1478
ORA-06512: at line 1
用这句删除materialized view 即可继续进行
drop materialized view log on ;
drop materialized view log on t;
OR
drop materialized t;
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