MySql分页存储过程

MySql测试版本：5.0.41-community-nt

/*****************************************************
MySQL分页存储过程
吴剑 2009-07-02
*****************************************************/
DROP PROCEDURE IF EXISTS pr_pager;
CREATE PROCEDURE pr_pager(

    IN    p_table_name        VARCHAR(1024),        /*表名*/
    IN    p_fields            VARCHAR(1024),        /*查询字段*/
    IN    p_page_size            INT,                /*每页记录数*/
    IN    p_page_now            INT,                /*当前页*/
    IN    p_order_string        VARCHAR(128),        /*排序条件(包含ORDER关键字,可为空)*/
    IN    p_where_string        VARCHAR(1024),        /*WHERE条件(包含WHERE关键字,可为空)*/
     OUT    p_out_rows            INT                    /*输出记录总数*/
    
)
    NOTDETERMINISTIC
     SQL SECURITY DEFINER
     COMMENT '分页存储过程'
    
BEGIN

    /*定义变量*/
    DECLARE m_begin_row INT DEFAULT 0;
    DECLARE m_limit_string CHAR(64);

    /*构造语句*/    
    SETm_begin_row =(p_page_now - 1) *p_page_size;
    SETm_limit_string = CONCAT(' LIMIT ', m_begin_row, ', ', p_page_size);
    
    SET @COUNT_STRING = CONCAT('SELECT COUNT(*) INTO @ROWS_TOTAL FROM ', p_table_name, ' ', p_where_string);
    SET @MAIN_STRING = CONCAT('SELECT ', p_fields, ' FROM ', p_table_name, ' ', p_where_string, '', p_order_string,m_limit_string);

    /*预处理*/
    PREPARE count_stmt FROM @COUNT_STRING;
    EXECUTE count_stmt;
    DEALLOCATE PREPARE count_stmt;
    SETp_out_rows = @ROWS_TOTAL;

    PREPARE main_stmt FROM @MAIN_STRING;
    EXECUTE main_stmt;
    DEALLOCATE PREPARE main_stmt;
    
END;

 

 

调用

mysql>call pr_pager("t","var",3,3,"","",@result);

mysql>call pr_pager("t","var",3,2,"","",@result);