mysql 存储过程实现分页, 排序

在mysql 存储过程实现分页, 排序

CREATE DEFINER=`root`@`localhost` PROCEDURE  `usp_myuser_pager`(
    `p_page` INT   ,    -- 页号
    `p_rows` INT   ,     -- 每页行数
    out  total_row INT  ,    -- 总共行数
    `p_sort` VARCHAR(40) ,     -- 排序
    `p_desc` VARCHAR(10)     -- 升序降序
)
BEGIN
    
    
    
    declare my_sqll varchar(500);
    set p_page = p_page -1;
    
    if (p_sort ='') then
        set p_sort ='id';
    end if;
    
    select count(*)  into  total_row
    from test_user ;
    
    set my_sqll= CONCAT('SELECT *,',total_row,' total_row FROM test_user  a JOIN ( select id from test_user  
    order by ',p_sort,' ' , `p_desc`, ' limit ',p_page * `p_rows`,', ', `p_rows`,' ) b on a.id = b.id  order by a.',p_sort,' ' , `p_desc`);
    
    set @ms=my_sqll;
    PREPARE s1 from @ms;
    EXECUTE s1;
     deallocate prepare s1;
     
END