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高访问量的评论系统数据库存储过程架构
- 大家讲道理asal
- 2016-11-10 11:16:571151semak imbas
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 < 1
set @StartLou = 1;
set @SQL = N'select '+@Fields + N' from dbo.['+@tableName+N'] where Lou>=@StartLou and Lou<=@EndLou and SourceID = @SourceID order by Lou desc';
exec sp_executesql @SQL,
N'@SourceID int,@StartLou int,@EndLou int',
@SourceID,@StartLou,@EndLou;
end
end
GO
--踩
Create proc [dbo].[procCai]
(
@ID int,
@SourceID int,
@key nvarchar(50),
@Times int output
)
as
begin
declare @tableName nvarchar(80);
set @tableName = dbo.funGetTableName(@SourceID,@key);
declare @SQL nvarchar(MAX);
set @SQL = N'update dbo.['+@tableName+N'] set Cai=Cai+1 where ID=@ID;select @Times=Cai from dbo.['+@tableName+N'] where ID=@ID';
exec sp_executesql @SQL,
N'@ID int,@Times int output',
@ID,
@Times output;
end
GO
--顶
create proc [dbo].[procDing]
(
@ID int,
@SourceID int,
@key nvarchar(50),
@Times int output
)
as
begin
declare @tableName nvarchar(80);
set @tableName = dbo.funGetTableName(@SourceID,@key);
declare @SQL nvarchar(MAX);
set @SQL = N'update dbo.['+@tableName+N'] set Ding=Ding+1 where ID=@ID;select @Times=Ding from dbo.['+@tableName+N'] where ID=@ID';
exec sp_executesql @SQL,
N'@ID int,@Times int output',
@ID,
@Times output;
end
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