Question

我想按如下方式编写程序：

begin
if(condn1) then

statements;

end if ;

exception part

end ;

begin
if(condn2) then

statements;

end if ;

exception part

end ;

当我尝试编译此包时，我收到以下错误：

LINE/COL ERROR
-------- -----------------------------------------------------------------
509/5    PLS-00103: Encountered the symbol "WHEN" when expecting one of
         the following:
         ( begin case declare end exception exit for goto if loop mod
         null pragma raise return select update while with
         <an identifier> <a double-quoted delimited-identifier>
         <a bind variable> << continue close current delete fetch lock
         insert open rollback savepoint set sql execute commit forall
         merge pipe purge
         The symbol "case" was substituted for "WHEN" to continue.

545/10   PLS-00103: Encountered the symbol ";" when expecting one of the
         following:
         case

Answer 1

如果要包含多个异常部分，则必须为所需的每个异常部分包含整个块。块结构是：

DECLARE  [Optional]
  ...    [Optional]
BEGIN
  ...
EXCEPTION
  WHEN ... THEN
    ...
END;

因此，具有2个异常部分的代码应类似于以下代码：

DECLARE
   your_variables;
BEGIN
  BEGIN
    IF condition_1 THEN
      statements;
    END IF;
  EXCEPTION
    WHEN your_exceptions_for_part_1 THEN
      ...
  END;


  BEGIN
    IF condition_2 THEN
      statements;
    END IF;
  EXCEPTION
    WHEN your_exceptions_for_part_2 THEN
      ...
  END;
EXCEPTION
  WHEN common_exceptions THEN
    ...
END;

PL / SQL IF循环在我的包中不起作用

1 个答案: