千万级分页存储过程
2016-11-28 13:54
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大家百度一下这个标题立马会出现很多相关信息,都大同小异,我自己拷贝的一个,应项目的需要,修改了一个排序的bug以及添加了返回总记录数,如下:SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGO--分页存储过程 CREATE PROCEDURE [dbo].[sp_Paging] ( @Tables nvarchar(1000), --表名/视图名 @PrimaryKey nvarchar(100), --主键 @Sort nvarchar(200) = NULL, --排序字段(不带order by) @pageindex int = 1, --当前页码 @PageSize int = 10, --每页记录数 @Fields nvarchar(1000) = N'*', --输出字段 @Filter nvarchar(1000) = NULL, --where过滤条件(不带where) @Group nvarchar(1000) = NULL, --Group语句(不带Group By) @TotalCount int OUTPUT --总记录数) AS DECLARE @SortTable nvarchar(100) DECLARE @SortName nvarchar(100) DECLARE @strSortColumn nvarchar(200) DECLARE @operator char(2) DECLARE @type nvarchar(100) DECLARE @prec int
--设定排序语句IF @Sort IS NULL OR @Sort = '' SET @Sort = @PrimaryKey IF CHARINDEX('DESC',@Sort)>0 BEGIN SET @strSortColumn = REPLACE(@Sort, 'DESC', '') SET @operator = '<=' END ELSE BEGIN SET @strSortColumn = REPLACE(@Sort, 'ASC', '') SET @operator = '>=' END IF CHARINDEX('.', @strSortColumn) > 0 BEGIN SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn)) SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn)) END ELSE BEGIN SET @SortTable = @Tables SET @SortName = @strSortColumn END
--设置排序字段类型和精度 SELECT @type=t.name, @prec=c.prec FROM sysobjects o JOIN syscolumns c on o.id=c.id JOIN systypes t on c.xusertype=t.xusertype WHERE o.name = @SortTable AND c.name = @SortName IF CHARINDEX('char', @type) > 0 SET @type = @type + '(' + CAST(@prec AS varchar) + ')' DECLARE @strPageSize nvarchar(50) DECLARE @strStartRow nvarchar(50) DECLARE @strFilter nvarchar(1000) DECLARE @strSimpleFilter nvarchar(1000) DECLARE @strGroup nvarchar(1000) IF @pageindex <1 SET @pageindex = 1 SET @strPageSize = CAST(@PageSize AS nvarchar(50)) --设置开始分页记录数 SET @strStartRow = CAST(((@pageindex - 1)*@PageSize + 1) AS nvarchar(50)) --筛选以及分组语句IF @Filter IS NOT NULL AND @Filter != '' BEGIN SET @strFilter = ' WHERE ' + @Filter + ' ' SET @strSimpleFilter = ' AND ' + @Filter + ' ' END ELSE BEGIN SET @strSimpleFilter = '' SET @strFilter = '' END IF @Group IS NOT NULL AND @Group != '' SET @strGroup = ' GROUP BY ' --计算总记录数DECLARE @TotalCountSql nvarchar(1000)SET @TotalCountSql=N'SELECT @TotalCount=COUNT(*)' +N' FROM ' + @Tables + @strFilterEXEC sp_executesql @TotalCountSql,N'@TotalCount int OUTPUT',@TotalCount OUTPUT--执行查询语句 EXEC('DECLARE @SortColumn ' + @type + 'SET ROWCOUNT ' + @strStartRow + 'SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + 'SET ROWCOUNT ' + @strPageSize + 'SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '')
--设定排序语句IF @Sort IS NULL OR @Sort = '' SET @Sort = @PrimaryKey IF CHARINDEX('DESC',@Sort)>0 BEGIN SET @strSortColumn = REPLACE(@Sort, 'DESC', '') SET @operator = '<=' END ELSE BEGIN SET @strSortColumn = REPLACE(@Sort, 'ASC', '') SET @operator = '>=' END IF CHARINDEX('.', @strSortColumn) > 0 BEGIN SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn)) SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn)) END ELSE BEGIN SET @SortTable = @Tables SET @SortName = @strSortColumn END
--设置排序字段类型和精度 SELECT @type=t.name, @prec=c.prec FROM sysobjects o JOIN syscolumns c on o.id=c.id JOIN systypes t on c.xusertype=t.xusertype WHERE o.name = @SortTable AND c.name = @SortName IF CHARINDEX('char', @type) > 0 SET @type = @type + '(' + CAST(@prec AS varchar) + ')' DECLARE @strPageSize nvarchar(50) DECLARE @strStartRow nvarchar(50) DECLARE @strFilter nvarchar(1000) DECLARE @strSimpleFilter nvarchar(1000) DECLARE @strGroup nvarchar(1000) IF @pageindex <1 SET @pageindex = 1 SET @strPageSize = CAST(@PageSize AS nvarchar(50)) --设置开始分页记录数 SET @strStartRow = CAST(((@pageindex - 1)*@PageSize + 1) AS nvarchar(50)) --筛选以及分组语句IF @Filter IS NOT NULL AND @Filter != '' BEGIN SET @strFilter = ' WHERE ' + @Filter + ' ' SET @strSimpleFilter = ' AND ' + @Filter + ' ' END ELSE BEGIN SET @strSimpleFilter = '' SET @strFilter = '' END IF @Group IS NOT NULL AND @Group != '' SET @strGroup = ' GROUP BY ' --计算总记录数DECLARE @TotalCountSql nvarchar(1000)SET @TotalCountSql=N'SELECT @TotalCount=COUNT(*)' +N' FROM ' + @Tables + @strFilterEXEC sp_executesql @TotalCountSql,N'@TotalCount int OUTPUT',@TotalCount OUTPUT--执行查询语句 EXEC('DECLARE @SortColumn ' + @type + 'SET ROWCOUNT ' + @strStartRow + 'SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + 'SET ROWCOUNT ' + @strPageSize + 'SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '')