mysql 分页存储过程实例
发布:smiling 来源: PHP粉丝网 添加日期:2014-09-11 20:03:58 浏览: 评论:0
本文章收集了四款mysql 分页存储过程实例代码,有高效的分页存储过程以及入门级的和通用的存储过程分页代码,如果你正在学mysql分页存储过程就进来看看吧.
mysql测试版本:5.0.41-community-nt,mysql分页存储过程
- 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*/
- )
- not deterministic
- 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*/
- set m_begin_row = (p_page_now - 1) * p_page_size;
- set m_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;
- set p_out_rows = @rows_total;
- prepare main_stmt from @main_string;
- execute main_stmt;
- deallocate prepare main_stmt;
- end
一款高效的存储过程分页代码,存储过程分页的基本原理:我们先对查找到的记录集(支持输入查找条件_whereclause和排列条件_orderby)的key字段临时存放到临时表,然后构建真正的记录集输出.
- create procedure `mysqltestuser_select_pageable`(
- _whereclause varchar(2000), -- 查找条件
- _orderby varchar(2000), -- 排序条件
- _pagesize int , -- 每页记录数
- _pageindex int , -- 当前页码
- _docount bit -- 标志:统计数据/输出数据
- )
- not deterministic
- sql security definer
- comment ' '
- begin
- -- 定义key字段临时表
- drop table if exists _temptable_keyid; -- 删除临时表,如果存在
- create temporary table _temptable_keyid
- (
- userid int
- )type=heap;
- -- 构建动态的sql,输出关键字key的id集合
- -- 查找条件
- set @sql = 'select userid from mysqltestuser ';
- if (_whereclause is not null) and (_whereclause <> ' ') then
- set @sql= concat(@sql, ' where ' ,_whereclause);
- end if;
- if (_orderby is not null) and (_orderby <> ' ') then
- set @sql= concat( @sql , ' order by ' , _orderby);
- end if;
- -- 准备id记录插入到临时表
- set @sql=concat( 'insert into _temptable_keyid(userid) ', @sql);
- prepare stmt from @sql;
- execute stmt ;
- deallocate prepare stmt;
- -- key的id集合 [end]
- -- 下面是输出
- if (_docount=1) then -- 统计
- begin
- select count(*) as recordcount from _temptable_keyid;
- end;
- else -- 输出记录集
- begin
- -- 计算记录的起点位置
- set @startpoint = ifnull((_pageindex-1)*_pagesize,0);
- set @sql= ' select a.*
- from mysqltestuser a
- inner join _temptable_keyid b
- on a.userid =b.userid ';
- set @sql=concat(@sql, " limit ",@startpoint, " , ",_pagesize);
- prepare stmt from @sql;
- execute stmt ;
- deallocate prepare stmt;
- end;
- end if;
- drop table _temptable_keyid;
- end;
下面是mysqltestuser表的ddl:
- create table `mysqltestuser` (
- `userid` int(11) not null auto_increment,
- `name` varchar(50) default null,
- `chinesename` varchar(50) default null,
- `registerdatetime` datetime default null,
- `jf` decimal(20,2) default null,
- `description` longtext,
- primary key (`userid`)
- ) engine=innodb default charset=gb2312;
插入些数据:
- insert into `mysqltestuser` (`userid`, `name`, `chinesename`, `registerdatetime`, `jf`, `description`) values
- (1, 'xuu1 ', 'www.aimeige.com.cn ', '2007-03-29 12:54:41 ',1.5, 'description1 '),
- (2, 'xuu2 ', 'www.phpfensi.com ', '2007-03-29 12:54:41 ',2.5, 'description2 '),
存储过程调用测试:
-- 方法原型 `mysqltestuser_select_pageable`(条件,排列顺序,每页记录数,第几页,是否统计数据)
-- call `mysqltestuser_select_pageable`(_whereclause,_orderby ,_pagesize,_pageindex,_docount)
-- 统计数据
call `mysqltestuser_select_pageable`(null,null,null,null,1)
-- 输出数据,没条件限制,10条记录/页,第一页
call `mysqltestuser_select_pageable`(null, null, 10, 1,0)
-- 输出数据,条件限制,排列, 10条记录/页,第一页
call `mysqltestuser_select_pageable`( 'chinesename like ' '%飞3% ' ' ', 'userid asc ', 10, 1, 0)
一款mysql.net的方法
mysql + asp.net来写网站,既然mysql已经支持存储过程了,那么像分页这么常用的东西,当然要用存储过程啦.
不过在网上找了一些,发现都有一个特点——就是不能传出总记录数,干脆自己研究吧,终于,算是搞出来了,效率可能不是很好,但是我也觉得不错了,贴代码吧直接,也算是对自己学习mysql的一个记录.
- create procedure p_pagelist
- (
- m_pageno int ,
- m_perpagecnt int ,
- m_column varchar(1000) ,
- m_table varchar(1000) ,
- m_condition varchar(1000),
- m_orderby varchar(200) ,
- out m_totalpagecnt int
- )
- begin
- set @pagecnt = 1; -- 总记录数
- set @limitstart = (m_pageno - 1)*m_perpagecnt;
- set @limitend = m_perpagecnt;
- set @sqlcnt = concat('select count(1) into @pagecnt from ',m_table); -- 这条语句很关键,用来得到总数值
- set @sql = concat('select ',m_column,' from ',m_table);
- if m_condition is not null and m_condition <> '' then
- set @sql = concat(@sql,' where ',m_condition);
- set @sqlcnt = concat(@sqlcnt,' where ',m_condition);
- end if;
- if m_orderby is not null and m_orderby <> '' then
- set @sql = concat(@sql,' order by ',m_orderby);
- end if;
- set @sql = concat(@sql, ' limit ', @limitstart, ',', @limitend);
- prepare s_cnt from @sqlcnt;
- execute s_cnt;
- deallocate prepare s_cnt;
- set m_totalpagecnt = @pagecnt;
- prepare record from @sql;
- execute record;
- deallocate prepare record;
- end
方法四:mysql的通用存储过程,本着共享的精神,为大家奉献这段mysql分页查询通用存储过程,假设所用数据库为guestbook:
- use guestbook;
- delimiter $$
- drop procedure if exists prc_page_result $$
- create procedure prc_page_result (
- in currpage int,
- in columns varchar(500),
- in tablename varchar(500),
- in scondition varchar(500),
- in order_field varchar(100),
- in asc_field int,
- in primary_field varchar(100),
- in pagesize int
- )
- begin
- declare stemp varchar(1000);
- declare ssql varchar(4000);
- declare sorder varchar(1000);
- if asc_field = 1 then
- set sorder = concat( order by , order_field, desc );
- set stemp = <(select min;
- else
- set sorder = concat( order by , order_field, asc );
- set stemp = >(select max;
- end if;
- if currpage = 1 then
- if scondition <> then
- set ssql = concat(select , columns, from , tablename, where );
- set ssql = concat(ssql, scondition, sorder, limit ?);
- else
- set ssql = concat(select , columns, from , tablename, sorder, limit ?);
- end if;
- else
- if scondition <> then
- set ssql = concat(select , columns, from , tablename);
- set ssql = concat(ssql, where , scondition, and , primary_field, stemp);
- set ssql = concat(ssql, (, primary_field, ), from (select );
- set ssql = concat(ssql, , primary_field, from , tablename, sorder);
- set ssql = concat(ssql, limit , (currpage-1)*pagesize, ) as tabtemp), sorder);
- set ssql = concat(ssql, limit ?);
- else
- set ssql = concat(select , columns, from , tablename);
- set ssql = concat(ssql, where , primary_field, stemp);
- set ssql = concat(ssql, (, primary_field, ), from (select );
- set ssql = concat(ssql, , primary_field, from , tablename, sorder);
- set ssql = concat(ssql, limit , (currpage-1)*pagesize, ) as tabtemp), sorder);
- set ssql = concat(ssql, limit ?);
- end if;
- end if;
- set @ipagesize = pagesize;
- set @squery = ssql;
- prepare stmt from @squery;
- execute stmt using @ipagesize;
- end;
- $$
- delimiter;
可以存储为数据库脚本,然后用命令导入:
mysql -u root -p < pageresult.sql;
调用:call prc_page_result(1, "*", "tablename", "", "columnname", 1, "pkid", 25);
Tags: mysql分页存储 mysql分页过程
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