如何检查引用游标是否从 pl/sql 过程返回数据

发布于 2024-09-29 18:41:06 字数 640 浏览 4 评论 0原文

我想知道如何检查引用游标是否返回数据。

假设我在 PL/SQL 包中有以下代码：

type refcursor is ref cursor;

procedure Foo(cursorresult out refcursor) is
begin
  open cursorresult for
    select *
      from table t
      inner join t2 on t.id = t2.id
     where t.column1 is null;
end;

procedure DoSomeghingIfFooHasResults is
  curFoo refcursor;
  begin
    Foo(curSansOwner);
    if curFoo%found then
      -- Do something
    end if;
end function;

该代码用于更复杂的流程，并且 Foo 中的查询使用多个表。

我需要在 asp.net 应用程序中从 Foo 返回的数据，但是当 Foo 找到一些数据时我还需要执行一些操作。

我想在几个地方重用查询，但我认为这不是视图的良好候选者。

知道 Foo 是否发现某些东西的最佳方法是什么？

谢谢。

原文

I would like to know how to check if a ref cursor returns data.

Let's say I have the following code in a PL/SQL package:

type refcursor is ref cursor;

procedure Foo(cursorresult out refcursor) is
begin
  open cursorresult for
    select *
      from table t
      inner join t2 on t.id = t2.id
     where t.column1 is null;
end;

procedure DoSomeghingIfFooHasResults is
  curFoo refcursor;
  begin
    Foo(curSansOwner);
    if curFoo%found then
      -- Do something
    end if;
end function;

This code is used in a more involved process and the query in Foo is using multiple tables.

I need the data returned from Foo in an asp.net application, but I also need to do something when Foo finds some data.

I want to reuse the query at a few places, but I don't think this would be a good candidate for a view.

What would be the best way to know if Foo finds something ?

Thanks.

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清旖 2024-10-06 18:41:06

知道它是否找到某些东西的唯一方法是从中获取：

procedure DoSomeghingIfFooHasResults is
  curFoo refcursor;
  recFoo mytable%ROWTYPE;
  begin
    Foo(curFoo);
    fetch curFoo into recFoo;
    if curFoo%found then
      -- Do something
    end if;
end function;

The only way to know if it has found something is to FETCH from it:

procedure DoSomeghingIfFooHasResults is
  curFoo refcursor;
  recFoo mytable%ROWTYPE;
  begin
    Foo(curFoo);
    fetch curFoo into recFoo;
    if curFoo%found then
      -- Do something
    end if;
end function;

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