使用存储过程进行分页 [英] Pagination with the stored procedure

问题描述

我正在尝试添加分页存储过程的排序功能.

I am trying to add sorting feature of my pagination stored procedure.

我该怎么做，到目前为止我创建了这个.它工作正常，但是当传递 @sort 参数时，它不起作用.

How can I do this, so far I created this one. It works fine but when pass the @sort parameter, it didn't work.

ALTER PROCEDURE [dbo].[sp_Mk]
 @page INT,
 @size INT,
 @sort nvarchar(50) ,
 @totalrow INT  OUTPUT
AS
BEGIN
    DECLARE @offset INT
    DECLARE @newsize INT

    IF(@page=0)
    begin
       SET @offset = @page;
       SET @newsize = @size
    end
    ELSE 
    begin
        SET @offset = @page+1;
        SET @newsize = @size-1
    end
    -- SET NOCOUNT ON added to prevent extra result sets from
    SET NOCOUNT ON;
    WITH OrderedSet AS
    (
      SELECT *,
          ROW_NUMBER() OVER (ORDER BY @sort DESC) AS 'Index'
      FROM [dbo].[Mk]  
    )
   SELECT * 
   FROM OrderedSet 
   WHERE [Index] BETWEEN @offset AND (@offset + @newsize) 

   SET @totalrow = (SELECT COUNT(*) FROM [dbo].[Mk])
END

推荐答案

一种方法(可能不是最好的)是使用动态 SQL

One way (possibly not the best) to do it is to use dynamic SQL

CREATE PROCEDURE [sp_Mk]
 @page INT,
 @size INT,
 @sort nvarchar(50) ,
 @totalrow INT  OUTPUT
AS
BEGIN
    DECLARE @offset INT
    DECLARE @newsize INT
    DECLARE @sql NVARCHAR(MAX)

    IF(@page=0)
      BEGIN
        SET @offset = @page
        SET @newsize = @size
       END
    ELSE 
      BEGIN
        SET @offset = @page*@size
        SET @newsize = @size-1
      END
    SET NOCOUNT ON
    SET @sql = '
     WITH OrderedSet AS
    (
      SELECT *, ROW_NUMBER() OVER (ORDER BY ' + @sort + ') AS ''Index''
      FROM [dbo].[Mk] 
    )
   SELECT * FROM OrderedSet WHERE [Index] BETWEEN ' + CONVERT(NVARCHAR(12), @offset) + ' AND ' + CONVERT(NVARCHAR(12), (@offset + @newsize)) 
   EXECUTE (@sql)
   SET @totalrow = (SELECT COUNT(*) FROM [Mk])
END

这是SQLFiddle演示

Here is SQLFiddle demo

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