高效通用分页存储过程(支持多表关联)

改写了下通用存储过程分页,支持多表关联查询与排序.

/****************************************************
**获取分页数据的通用存储过程,支持多表关联查询  
**作者:蔡鸟非菜
**根据sql语句：
**select table1.*,table2.* into #tblTemp from table1,table2 where .. order by id
**select top 10 * from #tblTemp where id >= (select max(id) from (select top ((页码-1)*页大小) id from #tblTemp)
**Function  dbo.TrimColumn(@orderName)  去除字段的前缀  例如 @str = dbo.TrimColumn('A.ID')  则@str为'ID'
*****************************************************/
Create PROCEDURE GetDataPage
        (
        @tblName                varchar(255),                      --表名                         例如:set @tblName = 'table1 A,table2 B'
        @strGetFields           varchar(1000),                     --要显示的列的名称              例如:set @strGetFields = 'A.ID,A.条码,B.仓库名称'
        @orderName              varchar(255),                      --用来排序的字段名称            例如:set @orderName = 'A.ID'
        @orderType              bit,                               --设置排序类型，升序0，其他降序  例如:set @orderType = '0'
        @pageSize               int,                               --页显示的数据条数              例如:set @pageSize = '10'
        @pageIndex              int,                               -- 页码                        例如:set @pageIndex = '1'
        @doCount                bit,                               --返回记录总数，非则返回
        @strWhere               varchar(1500)                      --查询条件                      例如:set @strWhere = 'and A.仓库ID = B.ID'
        )

AS
        declare @strSQL varchar(8000)        -- 存放主SQL语句
        declare @strTmp varchar(110)                 -- 临时变量
        declare @strOrder varchar(400)                 -- 排序类型

        if @DoCount != 0 --需要返回记录总数时
        begin
                if @strWhere != ''
                        set @strSQL = 'select count(*) as Total from ' + @tblName + ' where 1 = 1 ' + @strWhere
                else
                        set @strSQL = 'select count(*) as Total from ' + @tblName + ''        
        end

        else  --不需要返回记录总数时
        begin
                if @orderType != '0'
                begin
                        set @strTmp = '<= (select min'
                        set @strOrder = ' order by ' + @orderName +' desc'
                end
                else
                begin
                        set @strTmp = '>= (select max'
                        set @strOrder = ' order by ' + @orderName +' asc'
                end
                
                
                 -- 查询的如果是第一页时
                if @pageIndex = 1
                begin
                        if @strWhere != ''
                                set @strSQL = 'select top '+ str(@PageSize) + ' ' + @strGetFields + ' from ' + @tblName + ' where 1 = 1 ' + @strWhere + ' ' + @strOrder  
                        else
                                set @strSQL = 'select top '+ str(@PageSize) + ' ' + @strGetFields + ' from ' + @tblName + ' '+ @strOrder
                end
            
                else --不是第一页时
                begin
                        if @orderType != '0'
                        begin
                                set @strOrder = ' order by ' + dbo.TrimColumn(@orderName) +' desc'
                        end
                        else
                        begin
                                set @strOrder = ' order by ' + dbo.TrimColumn(@orderName) +' asc'
                        end

                        set @strSQL = 'select ' + @strGetFields + ' into #tblTemp from ' + @tblName + ' where 1 = 1 ' + @strWhere + ' ' + @strOrder
                                    + ' select top ' + str(@PageSize) + ' * from [#tblTemp] '
                                    + ' where [' + dbo.TrimColumn(@orderName) + '] ' + @strTmp + '(['+ dbo.TrimColumn(@orderName) + ']) from  (select top '
                                    + str((@PageIndex-1)*@PageSize) + ' [' + dbo.TrimColumn(@orderName) + '] from [#tblTemp]) as tblTmp) ' + @strOrder
                                    + ' drop table #tblTemp '
            end  
                
        end
        exec(@strSQL)
        RETURN