oracle存储过程个人学习总结

常用分支循环：

if(condition)then
--TODO
end if;

while(condition) loop
--TODO
end loop;

for i in 1..100 loop
--TODO
end loop;

 

 

 

系统定义的游标类型：sys_refcursor

 

 

 

测试使用的建表语句：

create table CATALOG
(
  ID       NUMBER not null primary key,
  NAME     VARCHAR2(50),
  PID      NUMBER,
  ISPARENT NUMBER(1),
  CLEVEL   NUMBER(2)
)

 

测试存储过程：（为了使测试更直观，忽略一切异常和错误处理！）
插入分类的存储过程：

create or replace procedure insertCatalog
(
       v_name in varchar2,
       v_pid in number
)
as
c_level number;
begin
       if(v_pid = 0) then
           insert into catalog(id,name,pid,isparent,clevel) values(c_seq.nextval,v_name,v_pid,0,1);
       else
           select clevel into c_level from catalog where id = v_pid;
           c_level := c_level+1;
           update catalog set isParent = 1 where id = v_pid;
           insert into catalog(id,name,pid,isparent,clevel) values(c_seq.nextval,v_name,v_pid,0,c_level);
       end if;
       commit;
end;

 遍历分类的存储过程：

create or replace procedure showCatalog(v_pid number)
as
cursor c_c is select * from catalog where pid = v_pid;
i binary_integer := 0;
begin
  for c in c_c loop
    while( i < c.clevel ) loop
       dbms_output.put('--');
       i:=i+1;
    end loop;
    i:=0;
    dbms_output.put_line(c.name);
    if(c.isParent = 1)then
        showCatalog(c.id);
    end if;
  end loop;
end;

 

获取分类的存储过程：

create or replace procedure getcatalog(v_id in number,cur_catalog out sys_refcursor)
as
begin
  open cur_catalog for select * from catalog where pid = v_id;
end;