DELIMITER $$
DROP PROCEDURE IF EXISTS `dbcall`.`get_page`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `get_page`(
/**//*Table name*/
tableName varchar(100),
/**//*Fileds to display*/
fieldsNames varchar(100),
/**//*Page index*/
pageIndex int,
/**//*Page Size*/
pageSize int,
/**//*Field to sort*/
sortName varchar(500),
/**//*Condition*/
strWhere varchar(500)
)
BEGIN
DECLARE fieldlist varchar(200);
if fieldsNames=''||fieldsNames=null THEN
set fieldlist='*';
else
set fieldlist=fieldsNames;
end if;if strWhere=''||strWhere=null then
if sortName=''||sortName=null then
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
else
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' ORDER BY ',sortName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
end if;
else
if sortName=''||sortName=null then
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' WHERE ',strWhere,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
else
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' WHERE ',strWhere,' ORDER BY ',sortName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
end if;
end if;
PREPARE stmt1 FROM @strSQL;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
END$$
DELIMITER ; 本人原来是搞SQL SERVER的,现在学习MySQL,以上SQL中的@strSQL看不懂,@strSQL显然是个变量,但是没找到申明的地方。。谁能解释一下,谢谢!
DROP PROCEDURE IF EXISTS `dbcall`.`get_page`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `get_page`(
/**//*Table name*/
tableName varchar(100),
/**//*Fileds to display*/
fieldsNames varchar(100),
/**//*Page index*/
pageIndex int,
/**//*Page Size*/
pageSize int,
/**//*Field to sort*/
sortName varchar(500),
/**//*Condition*/
strWhere varchar(500)
)
BEGIN
DECLARE fieldlist varchar(200);
if fieldsNames=''||fieldsNames=null THEN
set fieldlist='*';
else
set fieldlist=fieldsNames;
end if;if strWhere=''||strWhere=null then
if sortName=''||sortName=null then
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
else
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' ORDER BY ',sortName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
end if;
else
if sortName=''||sortName=null then
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' WHERE ',strWhere,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
else
set @strSQL=concat('SELECT ',fieldlist,' FROM ',tableName,' WHERE ',strWhere,' ORDER BY ',sortName,' LIMIT ',(pageIndex-1)*pageSize,',',pageSize);
end if;
end if;
PREPARE stmt1 FROM @strSQL;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
END$$
DELIMITER ; 本人原来是搞SQL SERVER的,现在学习MySQL,以上SQL中的@strSQL看不懂,@strSQL显然是个变量,但是没找到申明的地方。。谁能解释一下,谢谢!
MySQL语法上与SQL SERVER略有差别,可以参考一下MYSQL的官方手册。
MySQL官方文档 http://dev.mysql.com/doc/refman/5.1/zh/index.html