UKOUG Tech14 – APEX Highlights




Last week I spent 4 days at the annual UK Oracle User Group conference, this time around called Tech14.  It was my first UKOUG conference in a number of years and I set out with the intention of treating it like an all you can eat buffet of APEX presentations and workshops.

So, what were the APEX highlights of Tech14? Well, I have to start with the presentations given by Joel KalmanDavid Peake (more...)

Using Apex Authorization schemes in PL/SQL

The problem with using APEX authorization schemes in PL/SQL has been addressed several times in blogs and forums, but we occasionally still get questions  on how to solve this:

I have a page where users with admin roles can modify data and other users can only view it. Hiding the button to save the record is easily done with an authorization scheme:

Capture

However, now I want my items to be displayed as “Read Only” too. There is (more...)

Can you build business critical applications with APEX?

Now and then this question pops up. And today this question was delivered to my mailbox again. A customer is busy starting a project to replace a current Oracle Forms application. So he asked Oracle and one of the Oracle partners: What should we use, APEX or ADF? A valid question that has been asked - and will be asked - by numerous customers. 
Of course, there is only one correct answer and that (more...)

UKOUG 2014 – A special edition

Although I’ve attended the UKOUG conferences since 2008, this year’s edition was somewhat special to me. Based on the attendee reviews of last year’s UKOUG, I was elected as “Best Overseas Speaker”. And for me that’s quite an honour and of course a recognition for years of work - and practice ;-)
And with a title comes a plaque - it’ll get a special place on my bookshelf. 

I didn’t just get (more...)

Oracle Mobile Day: It’s a Mobile Revolution and ODTUG’s Leading the Charge

IMG_4112

“The BIGGEST Fears of the Current Generation”

Dec. 2, 2014 marked the first ODTUG Oracle Mobile Day, hosted at Oracle Headquarters in Reston, VA. This is a format we hope to replicate in different cities across the US and in Europe in the future. We were really excited to have with us Suhas Uliyar, Oracle’s VP of Mobile Strategy and Product Management, and the visionary behind Oracle mobility. I had the honor of introducing him to (more...)

Boosting APEX menu SQL performance

If you're using dynamic SQL to source your menus and you're utilising the apex_application_pages dictionary view to build you list of menu options - I suggest you consider using Materialized Views.

We have a reporting application that does just this; and the query also links to an authorisation table that decides what types of users see which reports.

You can create a snapshot (materialized view) using something as simple as
create materialized view apx_application_pages
as (more...)

Apex Interactive Report: The difference between CIR and RIR

You’ve probably already used the reset functionality in an Interactive Report, but do you know the exact the difference between CIR (Clear Interactive Report) and RIR (Reset Interactive Report)?

RIR or CIR, what is it?

First, let’s explain what CIR and RIR is and how you can use it.

With CIR and RIR you can clear or reset your Interactive Report after using filters. This can be handy if you’ve applied a filter on a (more...)

Chrome Device Mode and Mobile Emulation

Recently a colleague suggested I take a fresh look at the mobile emulation button in Chrome's developer tools.

Apparently this was upgraded earlier in the year and it's a shame I didn't have this a year ago!

Chrome Developer Tools Mobile Emulation
Some immediate advantages I see for APEX development:




  • Specify the device you'd like to emulate from a decent range of contemporary devices
  • This viewport can then be easily scaled to suit whatever monitor (more...)

Sample TAPI Apex Application

If you attended my presentation at AUSOUG Perth earlier this month, or if you’ve had a peek at the slides, you may be interested in a more concrete demonstration of the ideas presented. So if you’d like to install and play with a sample application that includes a TAPI generator, feel free to download this.

Disclaimer: this is provided for information (and entertainment) purposes only.

Prerequisites:
Oracle Application Express 4.2.2 or later

Installation (more...)

Help for your keyboard users

Apex’s Blue Responsive Theme 25 is a great theme for building a user-friendly website, and unlike many other themes which make the item labels clickable to get help, it renders little question-mark icons to the right of each item that has a help message defined.

theme-25-help-icon

One issue with this design, however, is that a keyboard-savvy user (such as myself) hates to switch between keyboard and mouse – so they Tab between each field as they fill (more...)

Using APEX to Create a Mobile User Interface for Enterprise Manager 12c

On November 11th, I will be presenting at Oracle Day Istanbul. My presentation will be about creating a mobile interface (a simple application) using Application Express to access Oracle Enterprise Manager repository views (and some procedures) to manage incidents and problems. I know that there’s already an application for idevices, but my application is a web application designed for mobile (thanks to APEX), so it’s compatible with all devices. The sessions are short, only 30 (more...)

Next/Previous buttons from Interactive Report results

What could be simpler than a set of "Next" and "Previous" buttons?

What could be simpler than a set of “Next” and “Previous” buttons?

I love Interactive Reports, they make it easy to deliver a lot of power to users for very little development effort. However, with that power comes some complexity for building certain features not available in the base Apex toolset.

I had an IR with a fairly costly and complex query behind it, linked to another screen to view the details for a record. The (more...)

ORA-20104: create_collection_from_query ParseErr:ORA-00918: column ambiguously defined

Always check out the original article at http://www.oraclequirks.com for latest comments, fixes and updates.   If you are wondering why you are getting this error message after following the example in the documentation describing procedure CREATE_COLLECTION_FROM_QUERYB2 in the APEX_COLLECTION API, the quick answer is that the sample code is flawed. ORA-20104: create_collection_from_queryb2

Apex substitution strings in reports, not always replaced with their values, guess why?

Always check out the original article at http://www.oraclequirks.com for latest comments, fixes and updates. It's amazing to you find out how easy is to take for granted certain features of Apex for the simple fact that you have been using them for a long time without paying too much attention to certain specific details. This morning I ran a report that I rarely use in an application and to

How many page views can Apex sustain when running on Oracle XE?

Always check out the original article at http://www.oraclequirks.com for latest comments, fixes and updates. While some people think that hosting a web site on top of Oracle XE can be hardly considered much more than a joke, I can claim instead, basing on my personal experience of the last 5 years, that for small sites it can be a perfectly reasonable choice, provided you have the technical

Submit from jQuery modal causing session state protection violation

Don’t you hate those nagging issues where you attempt a few fixes in vain, waste hours of your life, and then suddenly the issue just resolves itself? What’s worse than an issue that won’t go away is one that just resolves itself and you don’t know why. You don’t know if it is just hiding, waiting to reappear at some inconvenient time later (e.g. when the app goes live in Production).

I added the (more...)

Change the Apex parsing schema at runtime

One of our clients needed an application for the follow-up of the production in their plants. The main feature of the application was to show all the data of the current year, but the client also wanted to be able to consult the historical data. Unfortunately the historical data was not in the same schema as the current data.

The two schemas:

  • SCHEMA_A
  • SCHEMA_A_HISTORY

As you could already guess, the second schema contained the historical data. Each year, (more...)

Time for an Oracle Apex feature request – single sign-on authentication

I've just submitted a feature request because I believe that the current Application Group concept is a fairly weak one if it doesn't bring about some advantage in terms of features for the developer. Basically what I am asking for is that one can easily implement a single sign-on authentication method across multiple applications within the same application group, pretty much like the existing

I am running for the ODTUG Board of Directors

After some thought, I decided I will be running for the ODTUG Board of Directors this year. I have been attending Kscope since 2008 (New Orleans). Presented at Kscope and APEXPosed since 2009. Did a few webinars. Was a member of the APEX Content Team for Kscope12 and 13. And now I am the Content Lead for the APEX track for KScope14 and Kscope15. So I like spending my free time for ODTUG, to keep (more...)

"Busy Button" with APEX5, jQuery and Font Awesome

Both jQuery and Font Awesome are standard included with APEX5 (still in early adopter). With a little bit of jQuery you can create an animated button that reflects that it is doing something in the background.
For this example I created a button "Text + Icon button". Simply drag and drop this in the Page Designer.
The Icon CSS Class: "fa-play-circle-o"
and the action: "Defined by Dynamic Action"
For the Dynamic Action: it should respond (more...)