Re: SQL Cursor issues

Hi Alan,

we do this all the time - lingering the cursors open to fetch additional rows when the user is paging forward - and closing and re-opening the cursor when users are refreshing with F5 - so I dare to say, that this is not a (pre-)compiler issue, but something hidden in the code.

OK - maybe some missing PTF - on which release is it?

Is this all happening in one program? Sub-procedures? Service-Programs? Activation Groups?

Let’s make it simple and recite Linus Torwalds: Talk is cheap, show me the code!

Is it possible to prepare a shortened version of the program that does create the same „glitch“ and post the code?

Regards,
Daniel

Von meinem iPhone gesendet

Am 16.06.2022 um 13:52 schrieb Alan Cassidy <cfuture@xxxxxxxxxxx>:

It seems to me if you close a cursor it should clear out everything, or at least when you reopen it. I'm not ready to say this is a compiler glitch but I at least need a work-around. I can't tell the users to hit F5 twice to get the Refresh.

--Alan

On 6/12/2022 12:43 PM, Sam_L wrote:
Sounds like it's probably a bug in you code. In debug, check the fields that control what is selected by the cursor. Perhaps something is being reset from the subfile or other display file to program variable interaction.

Also be sure you are checking the SQL status after both opening and closing the cursor.

Sam

On 6/11/2022 3:13 PM, Alan Cassidy wrote:
Good day all,

I have a program that declares and opens a cursor. The fetch is Load-All into a DS array that I use to populate a subfile. When the program first runs, works fine, I'm getting data displayed in the subfile, apparently data that should be there.

Here is the sequence of events:

1. Declare and open cursor M1.

2. Fetch all selected records into a DS array. Data is returned to the array.

3. Close the cursor.

4. Populate the subfile from the DS array. I see data, looks good.

5. Press F5 to refresh the data. (The cursor is based on an SQL View that should return data that reflects changes to the underlying tables/files the View is based on.

6. Returns ZERO rows. No data. Diagnostic data says zero too. So the subfile is what I call empty.

7. F5 again. Repeat steps 1 thru 4 again, this time there is data again.

After that it's a cycle. Press F5, blank screen. F5 again, data. F5 again, blanks. F5 again, data!

I thought of doing a DYNAMIC SENSITIVE SCROLL CURSOR so the cursor itself could get updated dynamically from data changes, /and/ at the same time I can FETCH FIRST again and start over.

Except then I need to rerun the Declare and Open when they request to position to certain other places in the data, plus I want to implement something like this for another place in the program where the users can request a different ORDER BY.

Any idea why this is happening, and more important how to "fix it"?

To anybody who replies, THANK YOU!

--Alan

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