#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

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...)

How to get ORE to work with APEX

This blog post will bring you through the steps of how to get Oracle R Enterprise (ORE) to work with APEX.

The reason for this blog posts is that since ORE 1.4+ the security model has changed for how you access and run in-database user defined R scripts using the ORE SQL API functions.

I have a series of blog posts going out on using Oracle Text, Oracle R Enterprise and Oracle Data Mining. (more...)

Oracle Text, Oracle R Enterprise and Oracle Data Mining – Part 3

This is the third blog post of a series on using Oracle Text, Oracle R Enterprise and Oracle Data Mining. Check out the first and second blog posts of the series, as the data used in this blog post was extracted, processed and stored in a databases table.

This blog post is divided into 3 parts. The first part will build on what was covered in in the previous blog post and will expand (more...)

Consuming a REST Web Service returning JSON in APEX

In APEX you can define a web service that returns XML as below - all declarative, just a few steps through a wizard.

Then generate a report on top of that web service - again just a few clicks through a wizard. The generated query looks like this:

select xtab."customerName"
     , xtab."customerId"
  from apex_collections c, 
          XMLTable('/Response/S_getCustomerListTableArray/S_getCustomerListArrayItem' passing xmltype001
            COLUMNS (more...)

Application Item Prefix Usage

I was constructing a fresh app for a presentation idea and I came to think about the prefix people use for Application Items in Oracle APEX.

I've seen a few variations used, and upon asking the question on Twitter (as a poll limited to 4 options), some came back with a few other suggestions.

The final tally based on the replies (we'll (more...)

APEX Survey Results: Editing Tools

Another preference question in my 2015 survey.

Q5: What editing tools do you use for PL/SQL and JavaScript

That Jeff Smith fellow should be pretty happy with the top result, but almost half of the "Other" responses said PL/SQL Developer. I used this many years ago while SQL Developer was still being born. Since SQL Developer was free and portable, it was an easy selection, though I only use if for queries, not PL/SQL development.


Prevent general row based search in an APEX Interactive Report

At my current project we use Interactive Reports heavily. But in some cases the underlying queries are rather complex and a query without any filter or with just a filter on all columns doesn't perform that well (understatement...). We already implemented a solution to prevent initial loading of the data by adding an additional criterium to the query ( :P400_SEARCH = 'Y' ). The default value of this hidden item is 'N' and on (more...)

Create a Navigation Bar based on a SQL statement

Creating a Navigation Bar using static values is very straightforward. Just create a list similar to this example below - and you can easily define multiple levels.
Then, in the User Interface Attributes, set that list to be your application's "Navigation Bar List" and specify the template.
And the Navigation Bar pops up nicely in the upper right corner of the screen.
So far so good.

But what if you don't want a Static List, (more...)

#DBADev (Ops), who knows what is going on…

I have been considering writing this article for quite some time now.
APEX Connect 2016 in Germany’s capital Berlin and the DOAG Database days have finally persuaded me to talk more about #DBADev, let me explain why…

Whenever in the stone age…

During my career as DBA, I was always working closely together with Oracle Forms & Reports developers. In retrospect, the cooperation in that time was remarkable.
These Forms & Reports developers had always (more...)

Slides and demo script from my ORDS talk at APEX Connect 2016 in Berlin

Hi everybody,

I just came back from the DOAG APEX Connect 2016 conference in Berlin ... very nice location, great content and the wonderful APEX community to hang out with ... always a pleasure. This time we felt a little bit pink ;)

As promised, you can download the slides and the demo script (as is) from my site.

Instructions are included.

See you at KScope in Chicago, #letswreckthistogether .

Cheers and enyoy!