--查看表上触发器定义
SELECT * FROM DBA_TRIGGERS WHERE TABLE_NAME='BN_SEQUENCE';
SELECT DBMS_METADATA.GET_DDL('TRIGGER','CHK_BIU_BN_SEQUENCE','GLOGOWNER') FROM DUAL;
SELECT DBMS_METADATA.GET_DDL('TRIGGER','BN_SEQUENCE_PN','GLOGOWNER') FROM DUAL;
-- Create table
create table BN_SEQUENCE
(
BN_RULE_GID VARCHAR2(101 CHAR) not null,
BN_CONTEXT VARCHAR2(300 CHAR) not null,
BN_SEQUENCE_ID VARCHAR2(50 CHAR) not null,
CURVALUE VARCHAR2(50 CHAR),
DOMAIN_NAME VARCHAR2(50 CHAR) not null,
INSERT_USER VARCHAR2(128 CHAR) not null,
INSERT_DATE DATE not null,
UPDATE_USER VARCHAR2(128 CHAR),
UPDATE_DATE DATE
)
tablespace DATA
pctfree 10
initrans 1
maxtrans 255
storage
(
initial 1
next 1
minextents 1
maxextents unlimited
pctincrease 0
);
.....
2、创建B表–BN_SEQUENCE_BAK
--这里只创建表定义,不加约束、索引、触发器、外键
-- Create table
create table BN_SEQUENCE_BAK
(
BN_RULE_GID VARCHAR2(101 CHAR) not null,
BN_CONTEXT VARCHAR2(300 CHAR) not null,
BN_SEQUENCE_ID VARCHAR2(50 CHAR) not null,
CURVALUE VARCHAR2(50 CHAR),
DOMAIN_NAME VARCHAR2(50 CHAR) not null,
INSERT_USER VARCHAR2(128 CHAR) not null,
INSERT_DATE DATE not null,
UPDATE_USER VARCHAR2(128 CHAR),
UPDATE_DATE DATE
)
tablespace DATA
pctfree 10
initrans 1
maxtrans 255
storage
(
initial 1
next 1
minextents 1
maxextents unlimited
pctincrease 0
);
3、分段insert
为了避免对线上环境的影响，建议分段insert，插入最近3个月的数据。
insert into BN_SEQUENCE_BAK select * from BN_SEQUENCE where update_date >=to_date('2019/08/19 00:00:00', 'yyyy/mm/dd hh24:mi:ss') and
update_date =to_date('2019/07/19 00:00:00', 'yyyy/mm/dd hh24:mi:ss') and
update_date =to_date('2019/06/19 00:00:00', 'yyyy/mm/dd hh24:mi:ss') and
update_date =to_date('2018/06/19 00:00:00', 'yyyy/mm/dd hh24:mi:ss') and
update_date
4、切换表
这里实际上我在生产环境做切换也踏坑了，没考虑到有物化视图这种情况，所以导致切换不了。
alter table BN_SEQUENCE rename to BN_SEQUENCE_ARCH;
alter table BN_SEQUENCE_BAK rename to BN_SEQUENCE;
5、数据补录
把前面插入数据后到切换表后的数据做一下补录。
insert into BN_SEQUENCE select * from BN_SEQUENCE_ARCH where update_date >=to_date('2019/09/19 14:00:00', 'yyyy/mm/dd hh24:mi:ss')
6、B表创建索引、触发器
记得需要重命名。
-- Add comments to the table
comment on table BN_SEQUENCE
is 'This table stores the current sequence value of the business number.';
-- Add comments to the columns
comment on column BN_SEQUENCE.BN_RULE_GID
is 'BN_RULE_GID contains the unique identifier for the Business Number (BN) rule.';
-- Create/Recreate primary, unique and foreign key constraints
alter table BN_SEQUENCE
add constraint PK_BN_SEQUENCE primary key (BN_RULE_GID, BN_CONTEXT, BN_SEQUENCE_ID)
using index
tablespace INDX
pctfree 10
initrans 2
maxtrans 255
storage
(
initial 1M
next 1M
minextents 1
maxextents unlimited
pctincrease 0
);
alter table BN_SEQUENCE
add constraint FK_BN_SEQRULE_GID foreign key (BN_RULE_GID)
references BN_RULE (BN_RULE_GID);
-- Grant/Revoke object privileges
grant select, insert, update, delete on BN_SEQUENCE to APP_USER;
grant select on BN_SEQUENCE to APP_USER_SELECT;
grant select, insert, update, delete on BN_SEQUENCE to EXT_USER;
....
