Khó khăn khi viết Stored Proc để tìm nạp dữ liệu cho Jqgrid Pagination

Theo tôi, bạn có thể sửa mã bằng cách sử dụng OrderBy trong GetFirst và GetNext một phần của Mệnh đề WITH, nhưng không trong GetAll phần. Đoạn mã tương ứng sẽ nói về điều sau

ALTER PROCEDURE [dbo].[NewStoredProc] 
(
    @skip int,
    @pageSize int,
    @OrderBy Varchar(20),
    @OrderByDirection Varchar(10)
 )

AS
BEGIN
    DECLARE @records int;
    SET NOCOUNT ON;
    SET @records =(select count(*) from Data where Status='A');

    IF @skip <= 0
        SELECT TOP (@pageSize) * from Data where Status='A' 
        ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                      THEN Column1
                 END DESC,
                 CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                      THEN Column1
                 END,
                 CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                      THEN Column2
                 END DESC,
                 CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                      THEN Column2
                 END,
                 CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                      THEN Column3
                 END DESC,
                 CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                      THEN Column3
                 END
    ELSE
        WITH GetAll AS (
            SELECT * from Data where Status='A'
        ),GetFirst AS (
            SELECT TOP (@skip) *
            FROM GetAll
            ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                          THEN Column1
                     END DESC,
                     CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                          THEN Column1
                     END,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                          THEN Column2
                     END DESC,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                          THEN Column2
                     END,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                          THEN Column3
                     END DESC,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                          THEN Column3
                     END
        ),GetNext AS (
            SELECT TOP (@pageSize) nt.*
            FROM GetAll AS nt
                LEFT OUTER JOIN GetFirst AS f ON f.Col1=nt.Col1
            WHERE f.Col1 IS  NULL
            ORDER BY CASE WHEN @OrderBy='Column1' AND @OrderByDirection='D'
                          THEN nt.Column1
                     END DESC,
                     CASE WHEN @OrderBy='Column1' AND @OrderByDirection !='D'
                          THEN nt.Column1
                     END,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection='D'
                          THEN nt.Column2
                     END DESC,
                     CASE WHEN @OrderBy='Column2' AND @OrderByDirection !='D'
                          THEN nt.Column2
                     END,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection='D'
                          THEN nt.Column3
                     END DESC,
                     CASE WHEN @OrderBy='Column3' AND @OrderByDirection !='D'
                          THEN nt.Column3
                     END
        )  
        SELECT * FROM GetNext

    RETURN @records;
END