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数据的同步为每个站点创建触发器同步表
2022-07-06 11:47:00 【全栈程序员站长】
大家好,又见面了,我是全栈君。
在数据同步时提到以前的博客,在每个站点都会有创建触发器对于每个工作表,当运行CRUD。触发器的任务就是对其进行操作sql声明拼接成一个字符串,并存储在表中synchro_tb_operate_log中,假设触发器运行出现异常,则将其异常信息保存在还有一个表中:SYNCHRO_DATA_EXCEP_LOG,当中
synchro_tb_operate_log字段信息:主键ID、拼接的sql语句(当中包括主键ID和地区代码)、是否完毕同步(默觉得0未完毕)、创建时间
SYNCHRO_DATA_EXCEP_LOG字段信息:主键ID、触发器异常名称、触发器异常信息、触发器异常出现的时间
以下是创建item_rec代码,也能够让我们来学习一下创建触发器相关的语法和知识:
create or replace
TRIGGER "ADMIN"."TRIGGER_ITEM_REC"
after insert or update or delete
on ITEM_REC FOR EACH ROW
/** HEAD
* @name 项目记录表触发器
* @description 变更事件。形成ddl语句插入同步表中
* @version 1.0.0
* @author Tang
* @create-date 2014-07-01
*/
declare
v_sql nvarchar2(3000); --暂时存放sql
v_zdcode varchar2(30):='08052'; --网站代码
v_exception varchar2(500);
begin
v_sql := null;
case when inserting then--插入数据
v_sql := 'insert into ITEM_REC('||
'ID,PROTEAMNAME,PY,PROID,'||
'JCTYPE,WORKFLAG,ZXFLAG,JWDCODE)'||
'values('''||
:new.ID||''','''||replace(:new.PROTEAMNAME,'''','')||''','''||:new.PY||''','''||:new.PROID||''','''||
:new.JCTYPE||''','''||:new.WORKFLAG||''','''||:new.ZXFLAG||''','''||v_jwdcode||''')';
when updating then--更新数据
v_sql := 'update ITEM_REC set '||
'PROTEAMNAME='''||replace(:new.PROTEAMNAME,'''','')||''''||
',PY='''||:new.PY||''''||
',PROID='''||:new.PROID||''''||
',JCTYPE='''||:new.JCTYPE||''''||
',WORKFLAG='''||:new.WORKFLAG||''''||
',ZXFLAG='''||:new.ZXFLAG||''''||
' where '||
'ID='||:old.ID||' and JWDCODE='''||v_jwdcode||'''';
when deleting then--删除数据
v_sql := 'delete from ITEM_REC t where t.ID='||:old.ID||' and t.JWDCODE='''||v_jwdcode||'''';
end case;
if v_sql is not null then--假设v_sql不为空。则将对应信息插入到synchro_tb_operate_log表中
insert into
synchro_tb_operate_log(sd_record_id,sd_record_sql,sd_flag,create_time)
values(SEQ_SYNCHRO_DATA.NEXTVAL,v_sql,0,to_char(sysdate,'YYYY-MM-DD HH24:MI:SS'));
end if;
exception
when others then--假设运行过程中出现异常,则将异常信息插入到SYNCHRO_DATA_EXCEP_LOG表中
v_exception := substr(sqlcode||'---'||sqlerrm, 1, 500);
insert into SYNCHRO_DATA_EXCEP_LOG
(ID,TRIGGER_NAME,EXCEPTION_INFO,EXCEPTION_TIME)
values
(sys_guid(),'Trigger_DICT_PROTEAM',v_exception,to_char(sysdate,'YYYY-MM-DD HH24:MI:SS'));
end TRIGGER_ITEM_REC;
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