Four examples of mysql paging stored procedures This article collects four MySQL paging stored procedure example codes, including efficient paging stored procedures as well as entry-level and general stored procedure paging codes. If you are learning MySQL paging stored procedures, come and take a look.
Four mysql tutorials with paging stored procedure examples
This article collects four MySQL paging stored procedure example codes, including efficient paging stored procedures as well as entry-level and general stored procedure paging codes. If you are learning MySQL paging stored procedures, come and take a look.
mysql test version: 5.0.41-community-nt
/***************************************************** *
mysql paging stored procedure
Wu Jian 2009-07-02
*************************************************** ***/
drop procedure if exists pr_pager;
create procedure pr_pager(
in p_table_name varchar(1024), /*table name*/
in p_fields varchar(1024), /*Query field*/
in p_page_size int, /*Number of records per page*/
in p_page_now int, /*Current page*/
in p_order_string varchar(128), /*Sort conditions (including order keyword, can be empty)*/
in p_where_string varchar(1024), /*where condition (contains where keyword, can be empty)*/
out p_out_rows int int /*Total number of output records*/
)
Not deterministic
sql security definer
Comment 'Paging stored procedure'
begin
/*Define variables*/
declare m_begin_row int default 0;
declare m_limit_string char(64);
/*Construction statement*/
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);
/*Preprocessing*/
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
An efficient stored procedure paging code
Basic principle of stored procedure paging: We first temporarily store the key field of the found record set (supports input search condition _whereclause and arrangement condition _orderby) into a temporary table, and then construct the real record set output.
create procedure `mysqltestuser_select_pageable`(
_whereclausevarchar(2000),
_orderbyvarchar(2000),
_pagesize , int , -- Number of records per page
_pageindex int , -- Current page number
_Docount bit -logo: statistical data/output data
)
Not deterministic
sql security definer
begin
-- Define key field temporary table
drop table if exists _temptable_keyid; -- Delete the temporary table, if it exists
create temporary table _temptable_keyid
(
userid int
)type=heap;
-- Build dynamic sql and output the id set of keyword keys
-- Search conditions
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);
-- Prepare id records to be inserted into the temporary table
set @sql=concat( 'insert into _temptable_keyid(userid) ', @sql);
execute stmt ;
deallocate prepare stmt;
-- key id collection [end]
-- The following is the output
if (_docount=1) then -- statistics
Select count (*) as recordcount from _temptable_keyid;
end;
else
begin
-Calize the starting point of the record record
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.bKjia.c0m ', '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教程.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's universal stored procedure, in the spirit of sharing, dedicates this MySQL paging query universal stored procedure to everyone. Assume that the database tutorial used is 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 order varchar(1000);
If asc_field = 1 then
set order = concat(order by, order_field, desc);
set stemp = <(select min;
else
set order = 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, order, limit?);
else
set ssql = concat(select, columns, from, tablename, order, 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, order);
set ssql = concat(ssql, limit, (currpage-1)*pagesize, ) as tabtemp), order);
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, order);
set ssql = concat(ssql, limit, (currpage-1)*pagesize, ) as tabtemp), order);
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;
Can be stored as a database script and then imported with the command:
mysql -u root -p < pageresult.sql;
Call: call prc_page_result(1, "*", "tablename", "", "columnname", 1, "pkid", 25);
*/
?>
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