Question

我们需要在SQL Server数据库中存储“Setup”结构。 “设置”具有多个“通道”，其可以具有子通道。每个通道都可以有多个“变量”，其中包含带有值的标准属性。

此结构在C＃项目中定义。因此，有一个包含List的Setup对象，有一个包含List和List的Channel对象。

我实际上已经通过创建一个Setup表，一个带有设置和自引用外键的Channel表，以及一个带有外键到通道的Variable表来完成项目。

c＃程序需要一些功能来列出现有的设置，加载和保存。

我创建了一个存储过程来保存一个接受3个表参数的设置：Setup（应该只包含一行），Channel和Variable。输入参数仅包含实体的自然键。然后，存储过程将它们插入或更新到db。

为了加载一个设置，我创建了一个执行3个选择的存储过程。然后c＃通过SqlCommand.ExecuteReader（）读取它们。

问题：存储设置存储过程该死的过于复杂。这里简要介绍一下步骤。由于Channels的层次结构，这一切都变得复杂得多，因为我需要逐步处理层次结构的每个级别：

Parameter validity check

Check if Setup exists
    if yes, update, keep its id (SetupID)
    if not, insert, keep its id (SetupID)

Update SetupID in parameter tables Channel,Variable
Fetch ChannelID for channels given in parameters that do exist in the database
Fetch VariableID for variables given in parameters that do exist in the database

Delete channels and variables that do exist in database for that setup, but were not provided in the parameters
    Channels should be recursively deleted, first the ones without children, then their parents etc.

Insert new Channels (given in parameters, not existing in the database)
    Do it recursively, first for the ones without children, then, their parents, etc.
    Every time you do some insert, update the respective ChannelID in the parameter tables
Update Channels given in parameters that do exist in the database

Insert new Variables (given in parameters, not existing in the database)
Update Variables given in parameters that do exist in the database

它转换为大约250行T-SQL代码，花了我2天的时间来编写和错误检查。它现在工作正常，但我相信它可以用更简单的方式完成。有什么想法/意见吗？

P.S。：保存在XML中不是一种选择，因为项目的关键思想是能够查看所有属性并对其进行查询，验证，生成报告和统计信息等。

提前致谢！

更新：表创建脚本

CREATE TABLE [dbo].[Setup](
    [SetupID] [int] IDENTITY(1,1) NOT NULL,
    [Name] [nvarchar](50) NOT NULL,
    [Type] [nvarchar](4000) NULL,
    [Info] [nvarchar](4000) NULL,
    [FirstInserted] [datetime] NULL,
    [LastUpdated] [datetime] NULL,
 CONSTRAINT [PK$Setup] PRIMARY KEY CLUSTERED 
([SetupID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UQ$Setup$Name] ON [dbo].[Setup] 
([Name] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO

CREATE TABLE [dbo].[Channel](
    [ChannelID] [int] IDENTITY(1,1) NOT NULL,
    [SetupID] [int] NOT NULL,
    [Type] [nvarchar](50) NOT NULL,
    [ParentChannelID] [int] NULL,
    [Sequence] [int] NOT NULL,
    [PanelIdx] [nvarchar](4000) NULL,
    [Visible] [nvarchar](4000) NULL,
    [FirstInserted] [datetime] NULL,
    [LastUpdated] [datetime] NULL,
 CONSTRAINT [PK$Channel] PRIMARY KEY CLUSTERED 
([ChannelID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Channel]  WITH CHECK ADD  CONSTRAINT [FK$Channel$Channel] FOREIGN KEY([ParentChannelID])
REFERENCES [dbo].[Channel] ([ChannelID])
GO
ALTER TABLE [dbo].[Channel] CHECK CONSTRAINT [FK$Channel$Channel]
GO
ALTER TABLE [dbo].[Channel]  WITH CHECK ADD  CONSTRAINT [FK$Channel$Setup] FOREIGN KEY([SetupID])
REFERENCES [dbo].[Setup] ([SetupID])
GO
ALTER TABLE [dbo].[Channel] CHECK CONSTRAINT [FK$Channel$Setup]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UQ$Channel$SetupID_Type] ON [dbo].[Channel] 
([SetupID] ASC,[Type] ASC )
WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UQ$Channel$SetupID_ParentChannelID_Sequence] ON [dbo].[Channel] 
([SetupID] ASC, [ParentChannelID] ASC, [Sequence] ASC )
WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO

CREATE TABLE [dbo].[Variable](
    [VariableID] [int] IDENTITY(1,1) NOT NULL,
    [ChannelID] [int] NOT NULL,
    [Key] [nvarchar](50) NOT NULL,
    [Sequence] [int] NOT NULL,
    [DefaultText] [nvarchar](4000) NULL,
    [IONumber] [nvarchar](4000) NULL,
    [LinkType] [nvarchar](4000) NULL,
    [DataType] [nvarchar](4000) NULL,
    [ImageTrue] [nvarchar](4000) NULL,
    [ImageFalse] [nvarchar](4000) NULL,
    [FormatString] [nvarchar](4000) NULL,
    [GroupBoxIdx] [nvarchar](4000) NULL,
    [ControlIdx] [nvarchar](4000) NULL,
    [PlcVar] [nvarchar](4000) NULL,
    [Value] [nvarchar](4000) NULL,
    [DefaultValue] [nvarchar](4000) NULL,
    [MinValue] [nvarchar](4000) NULL,
    [MaxValue] [nvarchar](4000) NULL,
    [Measure] [nvarchar](4000) NULL,
    [KeyIdx] [nvarchar](4000) NULL,
    [Behavior] [nvarchar](4000) NULL,
    [TrueEnter] [nvarchar](4000) NULL,
    [ShowCheckDigit] [nvarchar](4000) NULL,
    [ShowOverflow] [nvarchar](4000) NULL,
    [Visible] [nvarchar](4000) NULL,
    [ReadOnly] [char](1) NULL,
    [Dynamic] [char](1) NULL,
    [FirstInserted] [datetime] NULL,
    [LastUpdated] [datetime] NULL,
 CONSTRAINT [PK$Variable] PRIMARY KEY CLUSTERED 
([VariableID] ASC)
WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UQ$Variable$ChannelID_Key] ON [dbo].[Variable] 
([ChannelID] ASC, [Key] ASC)
WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UQ$Variable$ChannelID_Sequence] ON [dbo].[Variable] 
([ChannelID] ASC, [Sequence] ASC )
WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Variable]  WITH CHECK ADD  CONSTRAINT [FK$Variable$Channel] FOREIGN KEY([ChannelID])
REFERENCES [dbo].[Channel] ([ChannelID])
GO
ALTER TABLE [dbo].[Variable] CHECK CONSTRAINT [FK$Variable$Channel]
GO
ALTER TABLE [dbo].[Variable]  WITH CHECK ADD  CONSTRAINT [CK$ChannelVariable$Dynamic_TF] CHECK  (([Dynamic]='T' OR [Dynamic]='F'))
GO
ALTER TABLE [dbo].[Variable] CHECK CONSTRAINT [CK$ChannelVariable$Dynamic_TF]
GO
ALTER TABLE [dbo].[Variable]  WITH CHECK ADD  CONSTRAINT [CK$ChannelVariable$ReadOnly_TF] CHECK  (([ReadOnly]='T' OR [ReadOnly]='F'))
GO
ALTER TABLE [dbo].[Variable] CHECK CONSTRAINT [CK$ChannelVariable$ReadOnly_TF]
GO

Answer 1

使用Object Relational Mapper。

.Net中的一些示例是Entity Framework（来自Microsoft），NHibernate（开源）和LLBLGen（商业）。

还有其他人，每个人都有其优点和缺点。

在SQL Server中保存（分层）c＃对象的结构 - ＆gt;复杂？

1 个答案: