sql - 更新临时表而不更新历史

Question

我有一个临时Person表PersonHistory。

列：

[Id], [Name], [DepartmentId], [ModifiedBy], [SysStartTime], [SysEndTime]

物理删除一行时，我想坚持谁删除了 中的行ModifiedBy，而不向PersonHistory.

关于如何实现这一目标的任何想法？

谢谢。

Answer 1

它可以完成，但它会有点hacky。此外，您将丢失将行更改为当前状态的任何人的历史记录（例如：user1 创建名称为“jams”的记录。user2 将名称更改为“james”。用户 3 删除了该行。在历史记录中，您不会看到 user2 从 'jams' 到 'james' 的编辑，只是 user3 删除了名为 'james' 的行）所以你失去了一点你的审计线索

这可能在触发器中起作用，我不确定，但如果您将相关表的删除操作限制为 SPROC，则可以这样完成：

CREATE PROC [People].[Person_Delete]
(
    @Id INT,
    @DeletedBy VARCHAR(255)
)
AS
BEGIN
    BEGIN TRY
        BEGIN TRANSACTION

            --===========================================================================================
            --TURN OFF SYSTEM VERSIONING FOR THE TARGET TABLE
            --===========================================================================================
            IF (SELECT temporal_type FROM sys.tables WHERE object_id = OBJECT_ID('People.Person', 'U')) = 2
            BEGIN
                EXEC(N'
                    PRINT(''Deactivating SYSTEM_VERSIONING for People.Person...'')
                    ALTER TABLE People.Person
                    SET (SYSTEM_VERSIONING = OFF)
                    ALTER TABLE People.Person
                    DROP PERIOD FOR SYSTEM_TIME
                ')
            END

            --===========================================================================================
            --UPDATE THE ModifiedBy VALUE
            --===========================================================================================

            UPDATE People.Person
            SET ModifiedBy = @DeletedBy
            WHERE Id = @Id

            --===========================================================================================
            --TURN ON SYSTEM VERSIONING FOR THE TARGET TABLE
            --===========================================================================================
            IF (SELECT temporal_type FROM sys.tables WHERE object_id = OBJECT_ID('People.Person', 'U')) = 0 
            BEGIN 
                EXEC(N' 
                    PRINT(''Activating SYSTEM_VERSIONING for People.Person...'') 
                    ALTER TABLE People.Person 
                    ADD PERIOD FOR SYSTEM_TIME (SysStartTime, SysEndTime) 
                    ALTER TABLE People.Person 
                    SET (SYSTEM_VERSIONING = ON (HISTORY_TABLE=People.PersonHistory, DATA_CONSISTENCY_CHECK=ON)) 
                ')
            END

            --===========================================================================================
            --DELETE THE RECORD
            --===========================================================================================
            DELETE People.Person
            WHERE Id = @Id

        COMMIT TRANSACTION
    END TRY
    BEGIN CATCH
        IF @@TRANCOUNT > 0
            ROLLBACK TRANSACTION

        ;THROW;
    END CATCH
END