愿天下没有难学的技术
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create table myPartition(id number,code varchar2(5),identifier varchar2(20)); insert into myPartition values(1,'01','01-01-0001-000001'); insert into myPartition values(2,'02','02-01-0001-000001'); insert into myPartition values(3,'03','03-01-0001-000001'); insert into myPartition values(4,'04','04-01-0001-000001'); commit; alter table myPartition add constraint pk_test_id primary key (id); |
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--管理员权限执行begin SQL> exec dbms_redefinition.can_redef_table('scott', 'myPartition'); PL/SQL procedure successfully completed |
–管理员权限执行end
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create table t_temp(id number,code varchar2(5), identifier varchar2(20)) partition by range(id)( partition TAB_PARTOTION_01 values less than (2), partition TAB_PARTOTION_02 values less than (3), partition TAB_PARTOTION_03 values less than (4), partition TAB_PARTOTION_04 values less than (5), partition TAB_PARTOTION_OTHER values less THAN (MAXVALUE) ); alter table t_temp add constraint pk_temp_id2 primary key (id); |
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--管理员权限执行sql命令行执行 exec dbms_redefinition.start_redef_table('scott', 'myPartition', 't_temp'); --管理员权限执行sql命令行执行 |
这里dbms_redefinition包的start_redef_table模块有3个参数，分别是SCHEMA名字、原表的名字、中间表的名字。
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select * from t_temp; |
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insert into myPartition values(5,'05','05-01-0001-000001'); commit; |
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select * from myPartition; select * from t_temp; |
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--管理员权限执行sql命令行执行,同步两边数据 exec dbms_redefinition.sync_interim_table('scott', 'myPartition', 't_temp'); --管理员权限执行sql命令行执行 |
查询同步后的两边数据是否一致：
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select * from myPartition; select * from t_temp; |
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--管理员权限执行sql命令行执行，结束重定义 exec dbms_redefinition.finish_redef_table('scott', 'myPartition', 't_temp'); --管理员权限执行sql命令行执行 |
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select * from myPartition; select * from t_temp; |
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select table_name, partition_name from user_tab_partitions where table_name = 'myPartition'; select * from myPartition partition(TAB_PARTOTION_01); |
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drop table t_temp purge; |