日期:2014-05-17  浏览次数:20872 次

oracle中怎样获取一行记录啊?
我想获取游标的一行记录,但是这样写是不对的,(v_row v_tab%rowtype;有错误)该怎样改正啊,多谢了!
create or replace procedure case_update_info( v_tab varchar2) as
type cur_type is ref cursor;
my_cur cur_type;
v_row v_tab%rowtype;
dyna_sql varchar2(1000);
begin
  dyna_sql := 'select id from '||v_tab||' where rownum=1';
  open my_cur for dyna_sql;
  fetch my_cur into v_row;
  while my_cur%found LOOP
  ……
end loop;
end case_update_info;

------解决方案--------------------
把整个逻辑用动态执行,可参考如下代码:
SQL code
CREATE OR REPLACE PROCEDURE p01(tablename IN VARCHAR2) AS 
v_sql VARCHAR2(500):=
'DECLARE 
type c_curref is ref cursor;
r_curref c_curref;
rec_c '||tablename||'%ROWTYPE;
BEGIN 
  OPEN r_curref FOR ''select * from '||tablename|| ' where rownum=1'';
  LOOP 
  FETCH r_curref INTO rec_c;
  EXIT WHEN r_curref%NOTFOUND; 
    Dbms_Output.put_line(''the SEQUENCE_NAME is :''||rec_c.SEQUENCE_NAME);
  END LOOP;
  CLOSE r_curref;
END;';
BEGIN 
execute immediate v_sql;
END p01;

EXEC p01('user_sequences');
输出:
the SEQUENCE_NAME is :S_DHBA2_SQNO