高访问量的评论系统数据库存储过程架构

网站的评论信息是最耗资源的地方，做好评论数据的优化对大型站点来说至关重要 无 SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[CommentsTables]([ID] [int] IDENTITY(1,1) NOT NULL,[Key] [nvarchar](50) NOT NULL,[TableName] [nvarch

网站的评论信息是最耗资源的地方，做好评论数据的优化对大型站点来说至关重要

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[CommentsTables](
	[ID] [int] IDENTITY(1,1) NOT NULL,
	[Key] [nvarchar](50) NOT NULL,
	[TableName] [nvarchar](80) NOT NULL,
	[StartID] [int] NOT NULL,
	[EndID] [int] NOT NULL,
 CONSTRAINT [PK_SysTables] PRIMARY KEY CLUSTERED 
(
	[ID] 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






--根据SourceID和key获得表名
create function [dbo].[funGetTableName]
(
@SourceID int,
@Key nvarchar(50)
)
RETURNS nvarchar(80)
as 
begin
	declare @tableName nvarchar(80);
	declare @tableArea int;
	declare @mod int;
	
	declare @Size int;
	set @Size = 1000;
	
	set @mod = @SourceID % @Size;
	if @mod > 0 
		set @tableArea = Cast((@SourceID-1) / @Size as int) + 1;		
	else	
		set @tableArea = Cast((@SourceID-1) / @Size as int);
			
			
	set @tableName = 'comments_' + @Key +  Cast(@tableArea as nvarchar(10));
	
	return @tableName
end
GO







--评论写入调用存储过程

CREATE proc [dbo].[procAddComment]
(
@ParentID int,
@SourceID int,
@NickName nvarchar(20),
@Content nvarchar(300),
@IP nvarchar(30),
@City nvarchar(30),
@BeFiltered bit,
@Disable bit,
@Key nvarchar(50),
@InsertedID int Output
)
as
begin
	declare @tableName nvarchar(80);
	declare @tableArea int;
	declare @mod int;
	
	declare @Size int;
	set @Size = 1000;
	
	set @mod = @SourceID % @Size;
	if @mod > 0 
		set @tableArea = Cast((@SourceID-1) / @Size as int) + 1;		
	else	
		set @tableArea = Cast((@SourceID-1) / @Size as int);
		


	
	set @tableName = 'comments_' + @Key +  Cast(@tableArea as nvarchar(10));
	
	if not Exists(select 'x' from [CommentsTables] where [Key]=@Key and [TableName]=@tableName)	
	begin
	
		declare @StartID int;
		declare @EndID int;
		
		set @EndID = @tableArea * @Size;
		set @StartID = @EndID - (@Size-1);
	
	
		--创建表
		declare @CreateSQL nvarchar(MAX);
		set @CreateSQL = 
		'Create table [dbo].['+@tableName+'](
		[ID] [int] IDENTITY(1,1) NOT NULL,
		[ParentID] [int] NOT NULL,
		[SourceID] [int] NOT NULL,
		[NickName] [nvarchar](20) NOT NULL,
		[Content] [nvarchar](300) NOT NULL,
		[Datetime] [datetime] NOT NULL,
		[IP] [nvarchar](30) NOT NULL,
		[City] [nvarchar](30) NOT NULL,
		[BeFiltered] [bit] NOT NULL,
		[Disable] [bit] NOT NULL,
		[Lou] [int] NOT NULL,
		[Ding] [int] NOT NULL,
		[Cai] [int] NOT NULL,
		 CONSTRAINT [PK_'+@tableName+'] PRIMARY KEY CLUSTERED 
		(
			[ID] ASC
		)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
		) ON [PRIMARY]'
		
		
		EXEC(@CreateSQL);
		
		
		--创建索引 ID DESC
		EXEC('		
		CREATE UNIQUE NONCLUSTERED INDEX [IX_'+@tableName+'_ID_DESC] ON [dbo].['+@tableName+'] 
		(
			[ID] DESC
		)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]');
		
		--创建索引 Ding DESC
		EXEC('
		CREATE NONCLUSTERED INDEX [IX_'+@tableName+'_Ding_DESC] ON [dbo].['+@tableName+'] 
		(
			[Ding] DESC
		)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]');
		
		--创建索引 SourceID DESC
		EXEC('
		CREATE NONCLUSTERED INDEX [IX_'+@tableName+'_SourceID_DESC] ON [dbo].['+@tableName+'] 
		(
			[SourceID] DESC
		)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]');

		--创建索引 Lou DESC
		EXEC('
		CREATE NONCLUSTERED INDEX [IX_'+@tableName+'_Lou_DESC] ON [dbo].['+@tableName+'] 
		(
			[Lou] DESC
		)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]')
		
		
		--创建默认值
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_ParentID]  DEFAULT ((0)) FOR [ParentID]');
		
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_Datetime]  DEFAULT (getdate()) FOR [Datetime]');
		
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_BeFiltered]  DEFAULT ((0)) FOR [BeFiltered]');	

		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_Disable]  DEFAULT ((0)) FOR [Disable]');
	
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_Lou]  DEFAULT ((1)) FOR [Lou]');
			
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_Ding]  DEFAULT ((0)) FOR [Ding]');
		
		EXEC('ALTER TABLE [dbo].['+@tableName+'] ADD  CONSTRAINT [DF_'+@tableName+'_Cai]  DEFAULT ((0)) FOR [Cai]');
		
		Insert Into [CommentsTables]([Key],[TableName],[StartID],[EndID]) values(@Key,@tableName,@StartID,@EndID);
	end 

	
	declare @TemLou int;
	declare @SQL nvarchar(MAX);
	set @SQL = N'select @TemLou = Count(ID) from dbo.['+@tableName+N'] where SourceID=@SourceID';
	
	exec sp_executesql @SQL,
	N'@SourceID int,@TemLou int output',
	@SourceID,
	@TemLou output;
	
	if @TemLou = 0
		set @TemLou = 1;
	else
		set @TemLou = @TemLou + 1;
	
	
	
	declare @Lou int;
	set @Lou = @TemLou;
	
	declare @InsertSQL nvarchar(MAX);
	set @InsertSQL = N'Insert Into dbo.['+@tableName+N'](ParentID,SourceID,NickName,Content,IP,City,BeFiltered,[Disable],[Lou])
	values (@ParentID,@SourceID,@NickName,@Content,@IP,@City,@BeFiltered,@Disable,@Lou);select @InsertedID = SCOPE_IDENTITY();';
	
	exec sp_executesql @InsertSQL,
	N'@ParentID int,@SourceID int,@NickName nvarchar(20),@Content nvarchar(300),@IP nvarchar(30),@City nvarchar(30),@BeFiltered bit,@Disable bit,@Lou int,@InsertedID int output',
	@ParentID,
	@SourceID,
	@NickName,
	@Content,
	@IP,
	@City,
	@BeFiltered,
	@Disable,
	@Lou,
	@InsertedID output;
end 








GO















--获得最新评论存储过程

CREATE proc [dbo].[procGetNewComments]
(
@SourceID int,
@Key nvarchar(50),
@PageIndex int,
@PageSize int,
@Fields nvarchar(100),
@PageCount int output
)
as
begin
	declare @tableName nvarchar(80);
	set @tableName = dbo.funGetTableName(@SourceID,@Key);
	declare @Rc int;	
	
	declare @SQL nvarchar(MAX);
	set @SQL = N'select @Rc = COUNT(ID) from dbo.['+@tableName+N'] where SourceID = @SourceID';	
	
	exec sp_executesql @SQL,
	N'@SourceID int,@Rc int output',
	@SourceID,
	@Rc output;
	
	if @Rc % @PageSize > 0 
		set @PageCount = Cast(@Rc / @PageSize as int) + 1;
	else
		set @PageCount = Cast(@Rc / @PageSize as int);
		

	
	if @PageIndex = 1 
		begin
			set @SQL = N'select top '+Cast(@PageSize as nvarchar(30))+' '+@Fields + N' from dbo.['+@tableName+N'] where SourceID=@SourceID order by Lou desc';					
			exec sp_executesql @SQL,
			N'@SourceID int',
			@SourceID;
		end 		
	else
		begin
			declare @StartLou int;
			declare @EndLou int;
			
			--1 20  1 - 20,21- 40,41-60
			set @EndLou =  @Rc - (@PageIndex-1) * @PageSize;
			
			if @EndLou > @Rc 
				set @EndLou  = @Rc;			
			
			set @StartLou = @EndLou - @PageSize + 1;
			
			if @StartLou =@StartLou and Lou