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oracle存储过程转换为mysql存储过程实例总结(数据库有感篇一)
2016-10-19 09:15:32         来源:积累点滴,保持自我  
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最近在接触数据库的有关知识,因为水平有限,对数据库方面的一些知识缺乏了解,这次遇见的主要是 数据库的存储过程,根据公司项目需求,将oracle的存储过程切换为mysql的存储过程,首先oracle的存储过程与mysql的存储过程差别是很大的(语法差别很大),通过好多天的网上查询资料,与同事们的交流,简单的实现了基本的转换,在这里肯定还有一些错误的地方,也欢迎各位大牛指出,让我更加深入的了解 数据库的存储过程,有疑问的大家也可以一起交流进步。

下面就进入这次的话题:oracle 存储过程 转换为mysql存储过程 实例总结

首先我门先看一下我最近大致转换的存储过程的一个例子代码,首先是原始的 oracle的存储过程:

 

CREATE OR REPLACE PROCEDURE xp_stat_BigDiseaseAnalyse( 
                              v_beginDate varchar2, --统计开始日期,格式:yyyyMMdd
                              v_endDate   varchar2, --统计结束日期, 格式:yyyyMMdd
                              v_orgCode   varchar2, --检查医疗机构
                              v_dataCur   out PK_base.cur, --返回结果集
                              v_total     out number, --返回查询记录总数
                              v_msg       out varchar2 --返回查询记录总数 
                              ) is
   v_sql varchar2(5000);
begin
 v_sql := 'select * from ( select max(ehr.forg_code) forg_code , ''冠心病'' fdiag_name ,count(a.fehrid) FDiseaseCount,sum(famount) 

famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
 where ehr.fdata_type=''3001''
 and a.fdiag_name like ''%冠心病%'' 
 and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''椎基底供血不足'' fdiag_name,count(a.fehrid) 

FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where  ehr.fdata_type=''3001'' and a.fdiag_name like ''%椎基底供血不足%'' 
and ehr.fehr_date  >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''糖尿病'' fdiag_name,count(a.fehrid) FDiseaseCount,sum

(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%糖尿病%''
and ehr.fehr_date  >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''脑出血'' fdiag_name,count(a.fehrid) FDiseaseCount,sum

(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%脑出血%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''无指征剖腹产分娩'' fdiag_name,count(a.fehrid) 

FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%无指征剖腹产分娩%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''肺炎'' fdiag_name,count(a.fehrid) FDiseaseCount,sum

(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺炎%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if; 
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''肺恶性肿瘤'' fdiag_name,count(a.fehrid) 

FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺恶性肿瘤%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if; 
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''高血压'' fdiag_name,count(a.fehrid) FDiseaseCount,sum

(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%高血压%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if; 
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code,  ''乳腺恶性肿瘤'' fdiag_name,count(a.fehrid) 

FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%乳腺恶性肿瘤%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || '''  ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || ''' ) tt where tt.FDiseaseCount>0 order by tt.FDiseaseCount desc';
end if; 
open v_dataCur for v_sql;
  exception
    when others then
      pk_base.xp_saveLog(sqlcode,
                         sqlerrm,
                         'pk_stat.xp_stat_BigDiseaseAnalyse',
                         '大病补偿统计出错');
      open v_dataCur for
      select * from dual where 1 = 2;
end;

 

下面是 经过大致转换的的mysql 存储过程 :

 

DROP PROCEDURE IF EXISTS xp_stat_BigDiseaseAnalyse;
CREATE PROCEDURE xp_stat_BigDiseaseAnalyse( 
                              v_beginDate varchar(100), -- 统计开始日期,格式:yyyyMMdd
                              v_endDate   varchar(100), -- 统计结束日期, 格式:yyyyMMdd
                              v_orgCode   varchar(50), -- 检查医疗机构
                              -- v_dataCur    PK_base.cur, --返回结果集
                              out v_total     int, -- 返回查询记录总数
                              out v_msg       varchar(100) -- 返回查询记录总数 
                              )
begin
 DECLARE	v_sql varchar(5000); 
 DECLARE iPos   int;
 DECLARE iCount int;
 DECLARE v_sqltmp varchar(420);

DECLARE CONTINUE HANDLER FOR  SQLEXCEPTION
   begin
   CALL xp_saveLog(@sqlcode,@sqlerrm,'pk_him.xp_stat_BigDiseaseAnalyse','大病补偿统计出错');
   
   COMMIT;
   end;
-- =================================================== 异常处理结束
 

SET v_sql = ' select * from (select max(ehr.forg_code) forg_code , ''冠心病'' fdiag_name 

,count(a.fehrid) FDiseaseCount,SUM(famount) 
famount,SUM(famount_insurance) famount_insurance,SUM(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
 where ehr.fdata_type=''3001''
 and a.fdiag_name like ''%冠心病%'' 
 and ehr.fehr_date >=  '''; 

SET v_sql = CONCAT(v_sql,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;


-- =================================================脑出血

-- =======================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''脑出血'' fdiag_name,count

(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%脑出血%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;

-- ==========================================椎基底供血不足

-- ==============================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''椎基底供血不足'' 

fdiag_name,count(a.fehrid)FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where  ehr.fdata_type=''3001'' and a.fdiag_name like ''%椎基底供血不足%'' 
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;


-- ========================================糖尿病

-- ================================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''糖尿病'' fdiag_name,count

(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%糖尿病%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;


-- 

-- 

-- ============
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''无指征剖腹产分娩'' 

fdiag_name,count(a.fehrid)FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%无指征剖腹产分娩%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;


-- =======================================================肺炎

-- =================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''肺炎'' fdiag_name,count

(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺炎%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if; 


-- ===============================================肺恶性肿瘤

-- =========================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''肺恶性肿瘤'' 

fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺恶性肿瘤%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;

-- ================================================高血压

-- ========================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''高血压'' fdiag_name,count

(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%高血压%''
 and ehr.fehr_date >=  '''; 


SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if; 

-- ============================================乳腺恶性肿瘤

-- ============================================================
SET v_sqltmp = ' union select max(ehr.forg_code) forg_code,  ''乳腺恶性肿瘤'' 

fdiag_name,count(a.fehrid) 

FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum

(famount_self) famount_self 
 from tbl_ehr_comm_disease a  
 join  tbl_ehr_archives ehr on ehr.fid=a.fehrid 
 join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%乳腺恶性肿瘤%''
 and ehr.fehr_date >=  '''; 

SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');

if (v_orgCode is not null and v_orgCode !='' ) then
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,' '' ');
end if; 


SET v_sql = CONCAT(v_sql,' ) tt order by tt.FDiseaseCount desc');

-- where tt.FDiseaseCount>0 
--  创建临时表
create temporary table if not exists tmpTab(
   FID int not null auto_increment,
   forg_code varchar(20),
   fdiag_name varchar(50),
   fDiseaseCount decimal(19,0),
   fAmount decimal(19,2),
   famount_insurance decimal(19,2),
   famount_self decimal(19,2),
   primary key (FID)
 ) ;

  truncate TABLE tmpTab;  
-- SET v_sql = 'insert into tmpTab

-- (forg_code,fdiag_name,FDiseaseCount,famount,famount_insurance,famount_self) ' || v_sql;
SET v_sql = CONCAT('insert into tmpTab

(forg_code,fdiag_name,FDiseaseCount,famount,famount_insurance,famount_self) ',v_sql);

set @s_sql = v_sql;
prepare stmt from @s_sql;
execute stmt;


SELECT * from tmpTab;

end


通过大致阅读上面的代码,我们可以发现,不同的地方有很多,不单单从字面上,从逻辑上也有很多不同之处。

为了更加直观的说明不同之处,下面列出一个表格来大致说明:

 

oracle 与 mysql 存储过程的区别
区别 oracle mysql
创建存储过程的语句不同 CREATE OR REPLACE PROCEDURE 存储过程名称() DROP PROCEDURE IF EXISTS xp_stat_BigDiseaseAnalyse;
CREATE PROCEDURE 存储过程名称()
参数的不同(参数类型,出参入参格式,) 1.入参(类型前加in 可以省略不写),出参必须在参数类型前加 out
2.字符类型为varchar2,后边不用初始化参数大小;
数字类型为number,不用初始化参数大小;
decimal类型,decimal(5,2)表示位数一共有5位,小数点后有两位;
PK_base.cur 为游标类型。
其他的数据类型请参考:oracle数据类型
1.入参(类型前加in也可以省略不写),出参必须在参数前加out(注意与oracle的区别)
2.字符类型为varchar,后面必须初始化参数大小;
数字类型有int,bigint等;
decimal类型,这个和oracle一样。
详细的其他的数据类型请参考:mysql数据类型
变量的定义方式 1.定义:直接在存储过程的的创建语句中声明变量,以及类型。
2.变量的赋值:变量名 := 赋值内容 即可。
1.定义:使用declare语句,例如: declare v_sql varchar(5000)
定义一个大小为5000 字符变量 v_sql
2.变量的赋值: set 变量名= 赋值内容
字符串连接的方式 oracle中使用 || 连接字符串,
例如:v_sql :='woshi' || 'zifuchuan'
则,v_sql的值为 woshizifuchuan
mysql中字符串的连接使用caoncat()函数,
例如: set v_sql=concat('woshi','zifuchuan')
v_sql 的值为 woshizifuchuan
游标的问题 详细参见:oracle游标使用 详细参见:mysql游标使用
分页查询的问题 oracle中分页查询主要依赖于rownum(它是一个Oracle中的系统变量,无需定义即可使用,有特定的含义)。详细的分页查询例子参见:
oracle分页查询

mysql中的分页查询,主要依赖limit语句来实现 limit 1,10 意思就是从第一行开始查询,查询10个记录。例如:

mysql中分页查询有两种方式, 一种是使用COUNT(*)的方式,具体代码如下
SELECT COUNT(*) FROM foo WHERE b = 1;

SELECT a FROM foo WHERE b = 1 LIMIT 100,10;
另外一种是使用SQL_CALC_FOUND_ROWS
SELECT SQL_CALC_FOUND_ROWS a FROM foo WHERE b = 1 LIMIT 100, 10;
SELECT FOUND_ROWS();

第二种方式调用SQL_CALC_FOUND_ROWS之后会将WHERE语句查询的行数放在FOUND_ROWS()之中,第二次只需


要查询FOUND_ROWS()就可以查出有多少行了。

异常处理 当存储过程语句执行错误,或者查询不到数据等情况出现时,就该设置异常,对异常进行处理。
oracle异常处理详见:oracle异常处理

当存储过程语句执行错误,或者查询不到数据等情况出现时,就该设置异常,对异常进行处理。
mysql异常处理详见:mysql异常处理
条件语句 if then else 等 具体实例参考:oracle if语句 详见:mysql中if语句的使用
函数的区别 (具体如日期转换函数等) 有时涉及到日期的转换(比如格式),有时要返回一个日期中的月份,第几天等等,都需要使用函数来实现.详见:oracle函数小结 本次涉及到的mysql函数有concat,以及一些日期转换函数。
其他的函数参考:mysql日期函数小结
单引号,双引号问题 详见:oracle单引号双引号 详见:mysql单引号双引号
注释的问题 oracle注释: --注释内容 mysql注释: -- 注释内容 (--后面比oracle多一个空格)
可否打包 oracle的存储过程可以,装在一个包中,即一个包中可以存在多个存储过程。 mysql不可以打包

通过上述大致的介绍,也许会有点收获,但是错误之处请各位指出。

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