Publishing Stored Procedure Execution in Transactional Replication

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Replication 不仅可以将Table Article 或 SP Article 推送到subscription，而且还能将sp的execution推送到subscription。推送sp的execution是指将执行sp的command 推送到subscriber去执行， 而不是将sp执行之后产生的大量transaction推送到subscriber上。Transaction是逐个更新Table Article中的数据行。

推送sp的execution来同步subscription的数据，对sp有一定的限制：

Stored procedure replication is not appropriate for all applications. If an article is filtered horizontally, so that there are different sets of rows at the Publisher than at the Subscriber, executing the same stored procedure at both returns different results. Similarly, if an update is based on a subquery of another, nonreplicated table, executing the same stored procedure at both the Publisher and Subscriber returns different results.

推送SP的execution设置Article的Properties ：Replicate  为 Execution of the stored procedure 或 Execution in a serialized of the SP 之一。

sp的代码是更新Table Article值，dbo.dt_study是一个Table Article，设置没有row filter 条件

ALTER PROCEDURE [dbo].[usp_Update_dt_study]
@id int,
@name varchar(100),
@sex bit
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    update dbo.dt_study
    set name=@name,
    sex=@sex
    where id=@id;

END

参考MSDN文档：Publishing Stored Procedure Execution in Transactional Replication

If you have one or more stored procedures that execute at the Publisher and affect published tables, consider including those stored procedures in your publication as stored procedure execution articles. The definition of the procedure (the CREATE PROCEDURE statement) is replicated to the Subscriber when the subscription is initialized; when the procedure is executed at the Publisher, replication executes the corresponding procedure at the Subscriber. This can provide significantly better performance for cases where large batch operations are performed, because only the procedure execution is replicated, bypassing the need to replicate the individual changes for each row. For example, assume you create the following stored procedure in the publication database:

CREATE PROC give_raise AS
UPDATE EMPLOYEES SET salary = salary * 1.10

This procedure gives each of the 10,000 employees in your company a 10 percent pay increase. When you execute this stored procedure at the Publisher, it updates the salary for each employee. Without the replication of stored procedure execution, the update would be sent to Subscribers as a large, multi-step transaction:

BEGIN TRAN
UPDATE EMPLOYEES SET salary = salary * 1.10 WHERE PK = ‘emp 1‘
UPDATE EMPLOYEES SET salary = salary * 1.10 WHERE PK = ‘emp 2‘

And this repeats for 10,000 updates.

With the replication of stored procedure execution, replication sends only the command to execute the stored procedure at the Subscriber, rather than writing all the updates to the distribution database and then sending them over the network to the Subscriber:

EXEC give_raise

BEGIN TRANSACTION T1
SELECT @var = max(col1) FROM tableA
UPDATE tableA SET col2 = <value> 
   WHERE col1 = @var 

BEGIN TRANSACTION T2
INSERT tableA VALUES <values>
COMMIT TRANSACTION T2

Publishing Stored Procedure Execution in Transactional Replication

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原文地址：http://www.cnblogs.com/ljhdo/p/5077949.html