实现千万级数据分页的存储过程
CREATE PROCEDURE GetRecordFromPage
@tblName varchar(255), -- 表名
@fldName varchar(255), -- 字段名
@fldIndex varchar(255)='', -- 无重复索引字段
@PageSize int = 10, -- 页尺寸
@PageIndex int = 1, -- 页码
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(2000) = '' -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL varchar(6000) -- 主语句
declare @strTmp varchar(1000) -- 临时变量
declare @strOrder varchar(500) -- 排序类型
declare @strField varchar(1000) -- 用来联合的字段
if @PageIndex < 1
return
set @strField = '[' + @fldName + ']'
-- 计算后的数据精确到小数点后 33 位
if @fldIndex != ''
set @strField = ' convert(numeric(38,33), [' + @fldName
+ ']) + convert(numeric(38,33), [' + @fldIndex
+ '] / 10000000000000000000000000000) '
if @OrderType != 0
begin
set @strTmp = '<(select min'
set @strOrder = ' order by ' + @strField + ' desc'
end
else
begin
set @strTmp = '>(select max'
set @strOrder = ' order by ' + @strField + ' asc'
end
set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
+ @tblName + '] where ' + @strField + @strTmp
+ '(tmpIndex) from (select top ' + str((@PageIndex-1)*@PageSize) + @strField
+ ' tmpIndex from [' + @tblName + ']' + @strOrder + ') as tblTmp)'
+ @strOrder
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
+ @tblName + '] where ' + @strField + @strTmp
+ '(tmpIndex) from (select top ' + str((@PageIndex-1)*@PageSize) + @strField
+ ' tmpIndex from [' + @tblName + '] where ' + @strWhere + ' '
+ @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
if @PageIndex = 1
begin
set @strTmp = ''
if @strWhere != ''
set @strTmp = ' where (' + @strWhere + ')'
set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
+ @tblName + ']' + @strTmp + ' ' + @strOrder
end
exec (@strSQL)
GO