Question

我正在尝试在oracle中运行一段代码，如果它抛出一些错误，它会退出该块。我该如何克服它？我尝试添加一些例外，但它没有用。下面是代码及其错误。

> begin for i in  (
>     select constraint_name , table_name 
>     from user_constraints 
>     where constraint_type ='C'
>     and status = 'ENABLED' ) LOOP dbms_utility.exec_ddl_statement('alter table "'|| i.table_name || '"
> disable constraint ' || i.constraint_name); end loop; end; /

并抛出以下错误，应忽略该错误，并且该块应继续执行。

begin
*
ERROR at line 1:
ORA-30671: cannot modify NOT NULL constraint on an identity column
ORA-06512: at "SYS.DBMS_UTILITY", line 574
ORA-06512: at line 9

我尝试添加一些效果不佳的例外。

Answer 1

你应该在这里使用嵌套的begin-end块，异常处理在INNER块中。

begin for i in  (
     select constraint_name , table_name 
     from user_constraints 
     where constraint_type ='C'
     and status = 'ENABLED' )
  LOOP
     BEGIN
      dbms_utility.exec_ddl_statement('alter table "'|| i.table_name || '"disable constraint ' || i.constraint_name);
     EXCEPTION
     WHEN OTHERS THEN
        /* Your exception handing here. */
        NULL;
     END;
  end loop;
  end;
  /

如何在ORACLE中执行代码块时忽略ERROR

1 个答案: