oracle存储过程(游标作为OUT参数输出)

ccgkren

转自：http://yde986.iteye.com/blog/808904

包中带过程

    要自己定义一个type [cur_name] is ref cursor游标，返回的时候就直接 procedure AAA(变量名 out [cur_name])如此申明OUT变量
    存储过程 用系统默认的 sys_refcursor 游标类型 定义变量就OK了
1、Sql代码
--PL/SQL Code (包中带过程) 过程带游标的OUT参数，返回游标(ref cursor)   
create or replace package my_pack as  
type my_ref_cursor is ref cursor;   
procedure getMyCursor(val out my_ref_cursor);   
end my_pack;   
  
create or replace package body my_pack as  
procedure getMyCursor(val out my_ref_cursor)   
is  
begin  
  open val for select * from student;   
end;   
end my_pack;   

  

--PL/SQL Code (包中带过程) 过程带游标的OUT参数，返回游标(ref cursor)
   create or replace package my_pack as
    type my_ref_cursor is ref cursor;
    procedure getMyCursor(val out my_ref_cursor);
   end my_pack;
   
   create or replace package body my_pack as
    procedure getMyCursor(val out my_ref_cursor)
    is
    begin
     open val for select * from student;
    end;
   end my_pack;

2、Java代码
Class.forName("oracle.jdbc.driver.OracleDriver");   
Connection conn = DriverManager.getConnection                       ("jdbc:oracle:thin:@XX.XX.XX.XXX:XXXX:oracle9i","XXX_temp","XXX_temp");   
DriverManager.registerDriver (new oracle.jdbc.OracleDriver());      
CallableStatement cs = conn.prepareCall("{ call my_pack.getMyCursor(?) }");   
cs.registerOutParameter(1,OracleTypes.CURSOR);   
cs.execute();   
ResultSet rs = ((OracleCallableStatement)cs).getCursor(1);   
while(rs.next())   
{   
    System.out.println(rs.getString(1)+"  "+rs.getString(2)+"  "+rs.getString(3)+"  "+ rs.getDate(4)+"  "+rs.getString(5));   
}  

   
   Class.forName("oracle.jdbc.driver.OracleDriver");
   Connection conn = DriverManager.getConnection                       ("jdbc:oracle:thin:@XX.XX.XX.XXX:XXXX:oracle9i","XXX_temp","XXX_temp");
   DriverManager.registerDriver (new oracle.jdbc.OracleDriver());   
   CallableStatement cs = conn.prepareCall("{ call my_pack.getMyCursor(?) }");
   cs.registerOutParameter(1,OracleTypes.CURSOR);
   cs.execute();
   ResultSet rs = ((OracleCallableStatement)cs).getCursor(1);
   while(rs.next())
   {
    System.out.println(rs.getString(1)+"  "+rs.getString(2)+"  "+rs.getString(3)+"  "+ rs.getDate(4)+"  "+rs.getString(5));
   }


3、Sql代码
--PL/SQL Code(存储过程) 带游标的OUT参数，返回游标(ref cursor)   
create or replace procedure retCursor(ret_cursor out sys_refcursor)is  
ret_cursor_value  sys_refcursor;   
begin  
open ret_cursor_value for select * from student;   
ret_cursor:=ret_cursor_value;   
end retCursor;  

  
--PL/SQL Code(存储过程) 带游标的OUT参数，返回游标(ref cursor)
   create or replace procedure retCursor(ret_cursor out sys_refcursor)is
   ret_cursor_value  sys_refcursor;
   begin
   open ret_cursor_value for select * from student;
    ret_cursor:=ret_cursor_value;
   end retCursor;


4、Java代码
Class.forName("oracle.jdbc.driver.OracleDriver");   
Connection conn = Connection conn = DriverManager.getConnection                       ("jdbc:oracle:thin:@XX.XX.XX.XXX:XXXX:oracle9i","XXX_temp","XXX_temp");   
  
DriverManager.registerDriver (new oracle.jdbc.OracleDriver());      
CallableStatement cs = conn.prepareCall("{ call retCursor(?) }");   
cs.registerOutParameter(1,OracleTypes.CURSOR);   
cs.execute();   
ResultSet rs = ((OracleCallableStatement)cs).getCursor(1);   
while(rs.next())   
{   
    System.out.println(rs.getString(1)+"  "+rs.getString(2)+"  "+rs.getString(3)+"  "+ rs.getDate(4)+"  "+rs.getString(5));   
}  

   Class.forName("oracle.jdbc.driver.OracleDriver");
   Connection conn = Connection conn = DriverManager.getConnection                       ("jdbc:oracle:thin:@XX.XX.XX.XXX:XXXX:oracle9i","XXX_temp","XXX_temp");

   DriverManager.registerDriver (new oracle.jdbc.OracleDriver());   
   CallableStatement cs = conn.prepareCall("{ call retCursor(?) }");
   cs.registerOutParameter(1,OracleTypes.CURSOR);
   cs.execute();
   ResultSet rs = ((OracleCallableStatement)cs).getCursor(1);
   while(rs.next())
   {
    System.out.println(rs.getString(1)+"  "+rs.getString(2)+"  "+rs.getString(3)+"  "+ rs.getDate(4)+"  "+rs.getString(5));
   }


5、下面是个每个学生求平均值的存储过程。遇到的问题是带参数游标中的变量名字不要和表中的一样，否则会出问题

Sql代码
create or replace procedure AAA   
as   
--查询学生表的ID   
cursor s_sno is select s.sno from student s;   
--通过学生ID查询平均成绩   
cursor sc_avg(s_no varchar2) is select avg(sc.degree) from score sc where sc.sno=s_no;   
s_sno_j student.sno%type;   --变量ID   
sc_avg_i score.degree%type; --变量平局成绩   
begin  
open s_sno;--打开查询ID的游标   
loop   
   fetch s_sno into s_sno_j;   
   exit when s_sno%notfound;     
     open sc_avg(s_sno_j); --打开查询平均成绩的游标，参数为学生ID   
     loop   
     fetch sc_avg into sc_avg_i;   
     exit when sc_avg%notfound;   
     dbms_output.put_line(sc_avg_i);   
     end loop;   
     close sc_avg;   
end loop;   
close s_sno;   
end AAA;