2分法分页存储过程修正版

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目前针对大数据量的数据显示(100w以上~1000w级别)能找到的最好的分页存储过程就是2分法的存储过程，它避免了以往的分页后面的越来越慢的问题，但是我发现目前网上的能找到的分页存储过程很多是转载的，有很多bug，不能直接使用，我就修正了一个，方便大家直接使用。

需要说明的是：这个存储过程参数比较多，我再实际使用中又在外面单独写了一个类，页面调用直接调用封装的类，方法有很多，主要是思路，大家可以参考下。

代码修改集中在类似

if @Sort=0
set @strTmp = @strTmp + '<(select min('
else
set @strTmp = @strTmp + '>(select max('

另外94行主要是配合我自己写的类，显示记录条数分页数等信息，如果不需要就去掉。




Code
1 ALTER PROCEDURE [dbo].[proc_ListPage]
2 (
3 @tblName nvarchar(200), ----要显示的表或多个表的连接
4 @fldName nvarchar(500) = '*', ----要显示的字段列表
5 @pageSize int = 10, ----每页显示的记录个数
6 @page int = 1, ----要显示那一页的记录
7 @fldSort nvarchar(200) = null, ----排序字段列表或条件
8 @Sort bit = 0, ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ')
9 @strCondition nvarchar(1000) = null, ----查询条件,不需where
10 @ID nvarchar(150), ----主表的主键
11 @Dist bit = 0, ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
12 @pageCount int = 1 output, ----查询结果分页后的总页数
13 @Counts int = 1 output ----查询到的记录数
14 )
15 AS
16 SET NOCOUNT ON
17 Declare @sqlTmp nvarchar(1000) ----存放动态生成的SQL语句
18 Declare @strTmp nvarchar(1000) ----存放取得查询结果总数的查询语句
19 Declare @strID nvarchar(1000) ----存放取得查询开头或结尾ID的查询语句
20
21 Declare @strSortType nvarchar(10) ----数据排序规则A
22 Declare @strFSortType nvarchar(10) ----数据排序规则B
23
24 Declare @SqlSelect nvarchar(50) ----对含有DISTINCT的查询进行SQL构造
25 Declare @SqlCounts nvarchar(50) ----对含有DISTINCT的总数查询进行SQL构造
26
27
28 if @Dist = 0
29 begin
30 set @SqlSelect = 'select '
31 set @SqlCounts = 'Count(0)'
32 end
33 else
34 begin
35 set @SqlSelect = 'select distinct '
36 set @SqlCounts = 'Count(DISTINCT '+@ID+')'
37 end
38
39
40 if @Sort=0
41 begin
42 set @strFSortType=' ASC '
43 set @strSortType=' DESC '
44 end
45 else
46 begin
47 set @strFSortType=' DESC '
48 set @strSortType=' ASC '
49 end
50
51
52
53 --------生成查询语句--------
54 --此处@strTmp为取得查询结果数量的语句
55 if @strCondition is null or @strCondition='' --没有设置显示条件
56 begin
57 set @sqlTmp = @fldName + ' From ' + @tblName
58 set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName
59 set @strID = ' From ' + @tblName
60 end
61 else
62 begin
63 set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition
64 set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition
65 set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition
66 end
67
68 ----取得查询结果总数量-----
69 exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
70 declare @tmpCounts int
71 if @Counts = 0
72 set @tmpCounts = 1
73 else
74 set @tmpCounts = @Counts
75
76 --取得分页总数
77 set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize
78
79 /**//**当前页大于总页数 取最后一页**/
80 if @page>@pageCount
81 set @page=@pageCount
82
83 --/*-----数据分页2分处理-------*/
84 declare @pageIndex int --总数/页大小
85 declare @lastcount int --总数%页大小
86
87 set @pageIndex = @tmpCounts/@pageSize
88 set @lastcount = @tmpCounts%@pageSize
89 if @lastcount > 0
90 set @pageIndex = @pageIndex + 1
91 else
92 set @lastcount = @pagesize
93
94 --为配合显示
95 set nocount off
96 select @page curpage,@pageSize pagesize,@pageCount countpage,@tmpCounts [Rowcount]
97 set nocount on
98
99 --//***显示分页
100 if @strCondition is null or @strCondition='' --没有设置显示条件
101 begin
102 if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理
103 begin
104 if @page=1
105 set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
106 +' order by '+ @fldSort +' '+ @strFSortType
107 else
108 begin
109 set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
110 +' where '+@ID
111 if @Sort=0
112 set @strTmp = @strTmp + '>(select max('
113 else
114 set @strTmp = @strTmp + '<(select min('
115 set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
116 +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
117 +' order by '+ @fldSort +' '+ @strFSortType
118 end
119 end
120 else
121
122 begin
123 set @page = @pageIndex-@page+1 --后半部分数据处理
124 if @page <= 1 --最后一页数据显示
125 set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(40))+' '+ @fldName+' from '+@tblName
126 +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
127 else
128 begin
129 set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
130 +' where '+@ID
131 if @Sort=0
132 set @strTmp=@strTmp+' <(select min('
133 else
134 set @strTmp=@strTmp+' >(select max('
135 set @strTmp=@strTmp+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
136 +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
137 +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
138 end
139 end
140
141 end
142
143 else --有查询条件
144 begin
145 if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理
146 begin
147 if @page=1
148 set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
149 +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType
150 else
151 begin
152 set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
153 +' where '+@ID
154 if @Sort=0
155 set @strTmp = @strTmp + '>(select max('
156 else
157 set @strTmp = @strTmp + '<(select min('
158
159 set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
160 +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
161 +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType
162 end
163 end
164 else
165 begin
166 set @page = @pageIndex-@page+1 --后半部分数据处理
167 if @page <= 1 --最后一页数据显示
168 set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(40))+' '+ @fldName+' from '+@tblName
169 +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
170 else
171 begin
172 set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
173 +' where '+@ID
174 if @Sort=0
175 set @strTmp = @strTmp + '<(select min('
176 else
177 set @strTmp = @strTmp + '>(select max('
178 set @strTmp = @strTmp + @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
179 +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
180 +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
181 end
182 end
183
184 end
185
186 ------返回查询结果-----
187 SET NOCOUNT off
188 exec sp_executesql @strTmp
189 print @strTmp