SQLServer與Oracle的資料同步(觸發器trigger)

標籤：

　說到同步,其實是靠"作業"定時調度預存程序來操作資料,增,刪,改,全在裡面,結合觸發器,遊標來實現,關於作業調度,使用了5秒運行一次來實行"秒級作業",這樣基本就算比較快的"同步"

　做的是SQL Server往Oracle端同步,先在sql server上建立往Oracle端的連結的伺服器,我用一個視圖"封裝"了一下連結的伺服器下的一張表。

create view v_ora_PUBLISHLASTREC         as         select * from ORACLEDB..ROADSMS.PUBLISHLASTREC         //ORACLEDB連結的伺服器名,ROADSMS為資料表空間名,PUBLISHLASTREC 為資料表名

　　然後分別在sql server 要同步的表上建立,insert,delete,update觸發器

　　指令碼如下:

--說明:modiid等於1為insert,2為delete,3為update         create trigger trg_PUBLISHLASTREC_insert on PUBLISHLASTREC for insert         as         insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)         select ‘1‘,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,‘0‘ from inserted         create trigger trg_PUBLISHLASTREC_update on PUBLISHLASTREC for update         as         insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)         select ‘3‘,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,‘0‘ from inserted         create trigger trg_PUBLISHLASTREC_delete on PUBLISHLASTREC for delete         as         insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)         select ‘2‘,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,‘0‘ from deleted

　　所有的操作都是把各表的資料插入到一張表中,上面統一插入的表為PublishLastRec_SQL,記錄下操作的標識,以標識該條記錄是插入,刪除,還是修改,modiid等於1為insert,2為delete,3為update,欄位isexec標識該條記錄是否已處理,0為未執行的,1為已執行的

　　接著就是最關鍵的一步,預存程序

　　指令碼如下:

ALTER proc pro_PublishLastRec_Sql         as         declare @modiid int         declare @signalguid int         declare @areano numeric(1,0)         declare @signalnote varchar(50)         declare @areanote varchar(50)         declare @publishroadstatus varchar(20)         declare @publishtime varchar(50)         if not exists(select * from PublishLastRec_SQL where IsExec=0)         begin         truncate table PublishLastRec_SQL         return         end         declare cur_sql cursor for         select modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime from         PublishLastRec_SQL where IsExec=0 order by [id]--IsExec 0為未執行的,1為已執行的         open cur_sql         fetch next from cur_sql into @modiid,@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime         while @@fetch_status=0         begin         if (@modiid=1) --插入         begin         insert into v_ora_PUBLISHLASTREC(SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime)         values(@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime)         end         if (@modiid=2) --刪除         begin         delete from v_ora_PUBLISHLASTREC where [email protected] and [email protected]         end         if (@modiid=3) --修改         begin         update v_ora_PUBLISHLASTREC         set [email protected],[email protected],[email protected],         [email protected]         where [email protected] and [email protected]         end         update PublishLastRec_SQL         set IsExec=1         where current of cur_sql         fetch next from cur_sql into @modiid,@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime         end         deallocate cur_sql

　　該預存程序使用遊標逐行提取PublishLastRec_Sql記錄,根據modiid判斷不同的資料操作,該條記錄處理完畢後把isexec欄位更新為1.

　　最後是調用該預存程序的作業,先建一個一分鐘運行一次的作業,然後在"步驟"的指令碼中這樣寫:

DECLARE @dt datetime         SET @dt = DATEADD(minute, -1, GETDATE())         WHILE @dt < GETDATE()         BEGIN         EXEC pro_PublishLastRec_Sql --這裡pro_PublishLastRec_Sql 為你要作業執行的預存程序         WAITFOR DELAY ‘00:00:05‘ -- 等待5秒, 根據你的需要設定即可         END

　　現在，我們即可以實現5秒執行一次該預存程序,做到5秒資料同步。

SQLServer與Oracle的資料同步(觸發器trigger)