Oracle 错误处理

2021-12-24 00:00:00 sql oracle plsql ora-00942

我有这样的代码:

DECLARE
  e_not_exist EXCEPTION;
  PRAGMA EXCEPTION_INIT(e_not_exist, -942);
  car_name VARCHAR2(20);
BEGIN
  select name_of_factory into car_name from car where car_id = 1;
  dbms_output.put_line(car_name);
EXCEPTION
  when e_not_exist then
    dbms_output.put_line('Table or view does not exist');
  when OTHERS then
    dbms_output.put_line(to_char(SQLCODE));
END;

实际上，我的表名是 CARS 而不是 CAR.但是 oracle 不处理这个异常并给我一个错误 ORA-00942:表或视图不存在.我该如何处理这个异常?

Actually, my table name is CARS but not CAR. But oracle doesn't handle this exception and gives me an error ORA-00942: Table or view doesn't exist. How can I handle this exception?

推荐答案

使用静态 SQL 无法做到这一点.代码正在编译而不是执行时会出现错误.试试这个:

You can't do that with static SQL. The error is coming when the code is being compiled, not executed. Try this instead:

 execute immediate 'select name_of_factory from car where car_id = 1' 
                    into car_name ;

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