高访问量的评论系统数据库存储过程架构

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