What is a good way to check if sql select basd cursor return anything

Hello everyone,
I am trying to find a good way to identify that a SQL select based cursor return nothing.
I know that or we use exception when no data found, or count(*) to check how many rows are returned.
I have a cursor based on quite a long select statement.
Like
CREATE OR REPLACE PROCEDURE aaa (v_input IN NUMBER, v_output OUT VARCHAR2)
     CURSOR long_cursor IS
          --long select statement(with input variable) ;
BEGIN
     Select count(*)
     Into v_count
From
-- a long select statment with input again ;
IF v_count > 0 then
    For record in long_cursor loop
     --Get information from cursor
        --other processing for output
    End loop;
END IF;
END;Is there any other way than the above ?
I would love to reduce the amount of typing. I know that repetition in code is not good.
Thanks in advance,
Ann
Edited by: Ann586341 on Feb 28, 2013 2:29 PM

>
Not sure I understand your point. I am still a new bie here.
>
A flag is just a piece of data. By itself it doesn't prevent anyone from changing the data. And in a multiuser system anything you try to check is based on the COMMITTED data in the system. Two users can be changing two different rows at the same time but neither user will see the other change.
So if you try to count how many rows meet a particular condition you may get a count of 8 but after the other user commits the count might be 7 or 9. So if you use 8 it may not be valid for very long.
>
But the app we use is Oracle Application Express 4.0.
I assume when the data is read, there will be some kind of lock on these rows so other users cannot change it, right ?
Or should I use SELECT for update even I do not update anything here.
>
I can't help you with that one. That would be a question for the application express forum.
Oracle Application Express (APEX)
You don't need to use FOR UPDATE if you don't plan to change the data. But, as explained above, you can't rely on any data you query being the same because another user could be changing it while you are looking at it.

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