Javascript based on PL/SQL function.

Hey all,
I'm developing an application with Apex and have run into a problem.
I have a form page with the standard create, delete and cancel buttons. I need to be able to click the Create button, which will run a PL/SQL query, and based on the return of the function, either just continue the Insert to the table, or generate a popup warning, and then complete the table insert.
I was thinking of having a Process that ran the javascript, and was conditional on the PL/SQL query, however i haven't had much luck.
Any help appreciated.
Thanks,
Brett Crowley.

Hello Brett,
>> I was thinking of having a Process that ran the javascript, and was conditional on the PL/SQL query, however i haven't had much luck.
APEX Processes are server-side resources, while JavaScript is a client-side resource. As such, you can’t invoke JavaScript code from within a PL/SQL code. However, the reverse direction – invoking PL/SQL code from a JavaScript code – is possible by using AJAX. In general, using AJAX allows you to call to an APEX on-demand PL/SQL (application) process, which in turn can return a result to the calling JavaScript code. In this point, based on the returned result, you can decide whether to issue an alert box or (programmatically) submit the page for further processing.
This forum includes many example of using AJAX, and I believe that the following article can also be a helpful starting point.
http://www.packtpub.com/article/ajax-implementation-apex
Regards,
Arie.
&diams; Please remember to mark appropriate posts as correct/helpful. For the long run, it will benefit us all.
&diams; Author of Oracle Application Express 3.2 – The Essentials and More

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Thank u..
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Russ Proudman wrote:
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Tracy,
<quote>â¦ only on row #40, the internet connection is lost. The only way the user can tell what happened is to look at the entire screen and reverify ALL the data in order to tell what got saved/resaved and what didn't</quote>
That would be "the only way" if the Java programmers had decided to totally bury the error â¦ what should happen here is the end-user should get a proper error message â¦ no need to re-verify at this point since all bets are off (in fact, nothing shouldâve been changed in the database).
Nonetheless, your concerns regarding the chosen approach are valid â¦ making multiple calls to the database after a Save makes controlling a business transaction rather complex (in an n-tier system) â¦ they should make one call only to the database passing in all the data to be saved â¦ one database transaction â¦ either all changes get applied or none.
The fact that lots of data may need to be passed in for one Save is of no relevance â¦ if you have to carry 500Kb of data for that screen then, well, you have to do it â¦ 1 bucket of 500Kb or 50 buckets of 10Kb? â¦ it doesnât really matter as far as the actual transport part is concerned.
As already answered, one can pass complex types in pl/sql â¦ so one database call per Save would be my first random thought. There are lots of suspect things in here â¦ some things you didnât mentioned at all â¦ like how is concurrency addressed? â¦ have you/they implemented some sort of optimistic locking mechanism? Of course the architecture of your system wonât be solved in a forum â¦ so, finding a good system/data/Oracle architect on site for the project would be my second random thought.
PS. One last random thought â¦ fight off that idea of packing and sending large strings (XML or not) â¦ if the data is structured then contemplate XML for no more than few seconds.

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