APEX Survey Results: Instrumentation Thoughts

This question in my 2015 survey is related to question 7 regarding instrumentation.

Q8: Do you have any thoughts you'd like to share on instrumentation?

I left this open for people to add a free-text response. Here are some worth highlighting, though it was hard to choose since so many people had something to add.

a) How would it help me?

Have a read of this post to get an idea of how the debug (more...)

APEX Frühstück Meetup Wien

Kurz notiert: am 4.11.2016 gibts ein APEX Frühstücks-Meetup mit vielen neuen Infos zu Oracle APEX.

Bitte hier anmelden: https://www.meetup.com/orclapex-Vienna/events/234665282/

Last week in Stream Processing & Analytics 10/17/2016

This is the 36th installment of my blog series around Stream Processing and Analytics.

As usual, find below the new blog articles, presentations, videos and software releases from last week:

News and Blog Posts



Apache Kafka

OTN Appreciation Day : APEX Metadata Repository

Thanks Tim for coming up with that great idea.

My favorite feature is the Oracle APEX Metadata Repository.

As you are probably aware of, APEX applications aren’t compiled. They are stored as metadata in a relational data model. Of course we aren’t allowed to access the tables in the APEX schema directly (e.g. APEX_050000), but APEX provides a bunch of dictionary views to read everything you want to know.

You can find all views (more...)

OTN Appreciation Day: PL/SQL

We are posting these blog posts today as part of the OTN Appreciation Day, a celebration for the Oracle Technology Network as suggested by Tim Hall, inspired by Debra Lilley.

The mission was not too hard: write about your favorite bit of Oracle Technology.

As a developer and a core-tech DBA and APEX enthusiast… the choice was easy! PL/SQL (apart from how it is pronounced or even written ;-)!

Why? Easy!

Not just because (more...)

OTN Appreciation Day: Oracle Express Edition (XE)

Tim Hall of oracle-base.com fame suggested we should all do an "OTN Appreciation" day in honor of the Oracle Technology Network (OTN), by blogging about our favorite Oracle product or feature.

My personal favorite is Oracle Express Edition (XE), the free version of the world's best relational database.

 Here's what's great about it:

OTN Appreciation Day : APEX Dynamic Actions

I'm going to take advantage of the fact I live in a city so remote to many others in this amazing community, and schedule this post for my local 8am time. It's seems my schedule didn't work. Not the first fail from blogger... This might get me as one of the first posts in what's hopefully an interesting day amongst Oracle bloggers.

Tim Hall, a great producer of resources for Oracle technologists, suggested bloggers new (more...)

Iconic Breadcrumbs in APEX

Normally when you use a Breadcrumb in an APEX application you enter the data and that's it. The breadcrumb will look something like this:

Or when you reduce the screen, the Breadcrumb will look slightly different:

It's trivial to replace the text that you enter in the Breadcrumb with a little bit of markup and show a Font Awesome (or with APEX 5.1 Font APEX) icon.

<span class="fa fa-home"></span>
Now the text will be (more...)

#doag2016 my picks and suggestions

As many conferences evolve over the years, the number of sessions on offer can easily be overwhelming. I have overheard many conference attendees wrestling with their choices for what to see and which sessions to attend.

For DOAG 2016 I have a short overview with my picks and with one or two tip-sessions. I hope this helps, though it is just my personal preference of course…

Please note that this post is based on the (more...)

OTN Nordic ACE Tour

In 1.5 week I'll be travelling to and through the Nordics as one of the speakers during the OTN Nordic ACE Tour. It will be quite a busy schedule!

On Monday afternoon I'll be flying to Copenhagen and will meet my fellow travellers for the week during a dinner hosted by the Danish Oracle User Group. On Tuesday I have two sessions during the event: One about APEX JavaScript API's and one about APEX (more...)

Show report tooltip as notification

Last week I described a method to make the tooltip on information more accessible to the end user.

Here is how you could make the same information available to touchscreen users.

1) First step, as before, is to define the HTML Expression of the column to include the title tag.
In this case I also stored my row identifier as an extra data- attribute.
<span title="#RECENT_NOTE#" data-key="#ROW_KEY#">#MY_COLUMN#</span>

2a) Create a dynamic action on click (more...)

Extend column tooltip to table cell

Quite sometime ago while still on 3.x I described a simple way to add tooltips in a report using standard HTML in a HTML Expression.
<span title="#RECENT_NOTE#">#MY_COLUMN#</span>

However, it will only appear when hovering over the span content, not anywhere within the table cell.

To do so we can add a dynamic action to execute some JavaScript after refresh of the relevant region.
$('td[headers=my_column] span').each( // for every data cell in the column

Last week in Stream Processing & Analytics 9/13/2016

This is the 31st installment of my blog series around Stream Processing and Analytics.

As usual, find below the new blog articles, presentations, videos and software releases from last week:

News and Blog Posts



Spark Streaming

Using inline dialogs in APEX 5

APEX 5 has built-in support for dialog boxes. These come in two varieties; dialog pages (which show another standard APEX page in a dialog box using an iframe) and inline dialogs (which show a region on the current page as a dialog box). John Snyders goes into great technical detail about APEX dialogs and the differences between the two types.

This post is a quick summary of how to use inline dialogs. As John points (more...)

APEX Survey Results: Workspace Activity Log

This question in my 2015 survey relates to built-in instrumentation.

Q7. Do you utilise apex_workspace_activity_log (for monitoring/reporting application usage)?

Yes (90)  47%
No (102) 53%

This log table reports details of all page rendering and AJAX process calls. I really like this information, though I would like to be able to add to the output things such as
sys_context('userenv', 'server_host')

In addition to the Monitoring pages you'll find in the APEX administration section, I've built (more...)

Users still double click buttons

Despite web pages having been around for quite some time, and users have been given years of affordance, people still double click on links & buttons in web pages.

This can cause a few issues in an APEX environment as the underlying process may get executed twice, and today I came up with what I thought was a simple, declarative solution.

In my case I had a button that submitted a modal page. I (more...)

APEX Survey Results: Instrumentation / Debugging

This question from my 2015 survey may pique curiosity among some APEX developers.

Q6: How do you instrument your code?

Hopefully those in the 22% who do not add instrumentation just didn't understand the question.

Instrumentation is another term for adding debugging information to your code. There is plenty of commentary on this topic and done right it can make tracking down problems a breeze.

It can be as simple as knowing when a procedure (more...)

How to Display a BLOB image in an APEX Report

Do you want to display an image on a report in APEX ?

Is the image stored as a BLOB data type in your schema or the blob is returned by some functions?

If so, then displaying the BLOB is not a simple or straight forward task.

Actually it is a simple and straight forward task, as long as you know "the trick" you need to create/defined in your APEX report.

The following steps outlines what (more...)

Creating an APEX plugin for an Oracle JET component – Part 2

In my previous blogpost I showed how you can embed an Oracle JET component in your APEX application. Now it is time to make a plugin out of the wisdom we gained doing so.
First of all a disclaimer. My intention is to make this plugin and the inner workings as simple as possible. So you can add a lot more functionality, checks etc and therefore add complexity. But this is intended to be as (more...)

How to debug stuff in Oracle APEX

Recently a fine young gentleman, who shall remain nameless (let's call him Jerry), asked for some assistance he was getting with an error in Oracle APEX.

He had done all the right things in regard to debugging the problem, but didn't know enough about APEX to know which settings to investigate.

I think developers new to APEX need the occasional post like this to give them an idea on how to start looking into a (more...)