Oracle中通过Job实现定时同步两个数据表之间的数据
摘要:之前项目中用的触发器来实现数据解析,但是最近客户反应,会报错,所以我们从新设计了一下,通过Oracle里面的Job来解决这一问题,这样就不会对原来的数据表做操作,只对临时表操作,就不会对客户那边的上级服务器产生影响了,详细请看下面: 一:首先
摘要:之前项目中用的触发器来实现数据解析,但是最近客户反应,会报错,所以我们从新设计了一下,通过Oracle里面的Job来解决这一问题,这样就不会对原来的数据表做操作,只对临时表操作,就不会对客户那边的上级服务器产生影响了,详细请看下面:
一:首先建个主表:MBINMSGS(这里的用户是MIP)
CREATE TABLE MIP.MBINMSGS ( ID NUMBER(30) NOT NULL, MBINMSGS_CLOB_MSG CLOB, MBINMSGS_DATE_RECEIVED DATE, MBINMSGS_DATE_PROCESSED DATE, MBINMSGS_SUBSYSTEM_NAME VARCHAR2(100 BYTE), MBINMSGS_SUBSYSTEM_DATE_SENT DATE, SERVICENAME VARCHAR2(30 BYTE) NOT NULL )
二:其次建个临时表用来存储主表过来的数据:MBINMSGS_TEMP
CREATE TABLE MIP.MBINMSGS_TEMP ( ID NUMBER(30) NOT NULL, MBINMSGS_CLOB_MSG CLOB, MBINMSGS_DATE_RECEIVED DATE, MBINMSGS_DATE_PROCESSED DATE, MBINMSGS_SUBSYSTEM_NAME VARCHAR2(100 BYTE), MBINMSGS_SUBSYSTEM_DATE_SENT DATE, SERVICENAME VARCHAR2(30 BYTE) NOT NULL )
CREATE OR REPLACE PROCEDURE MIP.JOB_PRO_TEMP AS TEMP_ID NUMBER; BEGIN SELECT NVL (MAX (ID), 0) INTO TEMP_ID FROM MBINMSGS_TEMP; INSERT INTO MBINMSGS_TEMP SELECT * FROM MBINMSGS WHERE MBINMSGS.ID > TEMP_ID; --insert into MBINMSGS_TEST select * from MBINMSGS; COMMIT; EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE ('Exception happened,data was rollback'); ROLLBACK; END; /
var job_num number; begin dbms_job.submit(:job_num,'JOB_PRO_TEMP;',SYSDATE,'sysdate+1/24/60'); end; commit;
SELECT * FROM USER_JOBS;
检查Oracle的JOB运行环境:如果为0表示不运行JOB,Oracle一般默认安装完为10,但是我安装oracle以后就不知道为什么是0。 查看进程数(这里是用system管理员账号登录) show parameter job_queue_processes; 修改进程数(如果你的是0,才需要按照以下语句修改): 我这里改为10模拟以下这个操作; 在PL/SQL的command窗口中输入以下语句: alter system set job_queue_processes=10 scope=both; 修改完以后我们查看一下,如果为10那就说明好了,然后你把刚才建的Job删除了,在重新建立一个Job: show parameter job_queue_processes;
exec dbms_job.remove(81);
说明:这里的数字81是对应DBA_JOBS表中当前要删除的JOB记录所在行的JOB字段的值;
更加详细的关于Oracle的Job请看:http://www.cnblogs.com/java-pan/archive/2012/09/16/oracle_job.html

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