pl/sql 显式游标

pl/sql 显式游标

create or replace package body peidw_test as
procedure createJob as 
      jobid number;
      v_sql varchar2(2000);
  begin
      v_sql:='begin
      if to_char(sysdate,''HH24:MI'')=''15:30'' then
                    select * from test;
                    dbms_output.put_line(''inserted success'');
                 end if;
                 commit;
              exception
                 when others then
                 rollback;
                 dbms_output.put_line(SQLERRM);
              end;
             ';

      dbms_job.submit(jobid,v_sql,sysdate,'sysdate+1/1440');
      dbms_job.run(jobid);
      dbms_output.put_line('job'||to_char(jobid)||' is running');
   end createJob;
procedure selectAddr_alias(addrid in number,arecord out cur_talias ) as
   
begin
    open arecord for
    select al_id ,al_name from addr_alias where addr_id=addrid;
end selectAddr_alias;

procedure curtest as
cursor cur_sel_addrAlias is
  select al_id,al_name from addr_alias ;
  alias TAlias;
begin
     --open cur_sel_addrAlias ;
     /*
     fetch cur_sel_addrAlias into alias;
     loop
         exit when cur_sel_addrAlias%notfound;
         dbms_output.put_line(alias.id||'----'||alias.AL_NAME);
     end loop;
     */
     /*
     fetch cur_sel_addrAlias into alias;
     while cur_sel_addrAlias%found  loop
         dbms_output.put_line(alias.id||'----'||alias.AL_NAME);
         fetch cur_sel_addrAlias into alias;
     end loop;

     */
     /*
    
     for idx in cur_sel_addrAlias loop --使用这方式遍历游标不能先打开游标变量
         dbms_output.put_line(idx.al_id||'----'||idx.al_name);
     end loop;
     close cur_sel_addrAlias;
     */
     dbms_output.put_line('....避免显式身明游标....');
     for idx in (select * from addr_alias) loop
        dbms_output.put_line(idx.al_id||'---'||idx.al_name||'---'||idx.addr_id);
     end loop;
exception
  when  others then
    dbms_output.put_line(sqlerrm);
end curtest;
end peidw_test;
---------------------------------------------------------------------

无聊今天看了一下oracle 9i开发人同指南，好久没写pl/sql了，今天主要看游标这一章。
显式游标有4个属性
     %found  指明是否取到了指定的记录行
         用于判定是否取到一条记录，取到返回true，如果fetch没取到任何行，就返回false。
     %isopen 指明游标是打开的还是关闭的
         用于检查游标是否打开，游标打开了就返回true,未打开返回false。
     %notfound
           指示fetch是否失败或是否还有可取的记录行
     %rowcount 指明总共取得多少行记录


参数游标：
定义
  cursor cur_sel_addrAliasByid(vaddr_id number) is
         select al_id,al_name from addr_alias where addr_id=vaddr_id;
使用
     open cur_sel_addrAliasByid(1);
     fetch cur_sel_addrAliasByid into alias ;
     while cur_sel_addrAliasByid%found loop
         dbms_output.put_line(alias.id||'----'||alias.AL_NAME);
         fetch cur_sel_addrAliasByid into alias;
     end loop;
     close cur_sel_addrAliasByid;
Select for Update 游标
   用来更新游标所检索到的记录如：
declare
    cursor cur_1 is 
      select al_id,al_name form addr_alias for update of al_name;
     vname varchar2(50)
begin
   for idx in cur_1 loop
         vname:=upper(idx.al_name);
         upate  addr_alias set al_name=vname where current of cur_1;
  end loop;

commit;
end;