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从T-SQL RowVersion更新中排除列

[英]Excluding column from T-SQL RowVersion update

原文 2017-09-19 11:46:36 9 1 sql/ sql-server/ tsql

I have a database table in SQL Server that I am using T-SQL's RowVersion to record a GenerationNumber and detect have any records changed. 我在SQL Server中有一个数据库表，该数据库表使用T-SQL的RowVersion记录GenerationNumber并检测是否有任何记录更改。 This paradigm has worked successfully for my application, but now I want to add a column that does not increment the RowVersion column on UPDATE . 此范例已成功地为我的应用程序工作，但现在我想添加一个不会增加UPDATE上的RowVersion列的列。

Is there any way of excluding a column from the RowVersion increment? 有什么办法从RowVersion增量中排除一列？ Or should I change the datatype of RowVersion to a datetime and handle it myself in a trigger? 还是应该将RowVersion的数据类型更改为datetime ，然后自己在触发器中处理它？

Any suggestions or ideas are welcome 欢迎任何建议或想法

1 个解决方案

If you currently have a table T - rename it as something like T_Tracked and introduce a second table T_Untracked that has a FK back to the first table. 如果您当前有一个表T ，则将其重命名为T_Tracked类的T_Tracked然后引入第二个表T_Untracked ，该表的FK返回第一个表。

Then introduce a view, T , that joins these tables together. 然后引入视图T ，将这些表连接在一起。 Your application continues to reference T . 您的应用程序继续引用T You then put your "trigger-writing" hat on and write appropriate triggers on this view to ensure that both tables are populated during an insert , both are deleted from during delete and only the applicable tables are updated during an update . 然后你把你的“触发写作”的帽子上写适当的触发这一观点，以确保这两个表的过程中填充insert ，无论是从过程中被删除delete ，只适用表的过程中更新update 。

That way it appears to still be a rowversion column but updates that only affect T_Untracked will not cause it to be changed. 这样，它似乎仍然是rowversion列，但是仅影响T_Untracked更新不会导致对其进行更改。