Oracle 12c: Temporal Validity, multiple on one table – Part Deux

One of the most wonderful things of Oracle Open World are the Demo-Grounds. When you want to learn more about a certain feature, this is the place to go to. The actual developers and product managers are there to answer your questions and more!

In a previous blog I had written about Temporal Validity in Oracle 12c and whether it would be possible to have multiple validity periods on one table. You can read that (more...)

DBMS_REDACT and complete ROW update

My session on "Oracle 12c for Developers" is done.Afterwards someone asks the question:

What happens when you use DBMS_REDACT with a complete row update?
My guess was that it would place the redacted data in the column, but I haven't tried it, so here goes:


create table emp
as
select ename
,to_char (abs (dbms_random.random)) credit_card
from scott.emp
;


begin
dbms_redact.add_policy
(object_schema => 'A'
,object_name => 'EMP'
,policy_name => 'Hide Creditcard'
,expression (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...)

Dynamic Action in Report – APEX5 version with Font Awesome

Almost two years ago, I wrote a little blog on how to trigger a Dynamic Action from a report. You can find that blog right here.
Things have changed with APEX5 (which is currently still in "early adaptor 2") which allow you to do this in a more clean way (or at least I think so). No need to create a "fake link" so the user know that the icon is clickable. No need to (more...)

Oracle 12c: Temporal Validity, multiple on one table

During a trial run for my presentation at Oracle Open World "Oracle 12c for Developers", you can find the slides on slideshare. there was a question regarding "Temporal Validity".
What is Temporal Validity?
The documentation says it best:

Temporal Validity Support lets you associate one or more valid time dimensions with a table and have data be visible depending on its time-based validity, as determined by the start and end dates or time stamps of (more...)

Multirecord Master-Detail Report

A common requirement is to show a Master-Detail Report where both the Master as well as the Detail Report show multiple records. When you click on one of the Master records, the connected detail records are shown as well.
This is very easy to accomplish with a Hidden item and a Dynamic Action.
First the Master Report, for this example I am using the DEPT table:

select d.deptno
,d.dname
,d.loc
from dept (more...)

5 minutes: Grant Role to Package

The EOUC (EMEA Oracle User Group Community) hosts a special session on sunday during Oracle Open World. This session contains twelve things about Oracle 12c. Each of these 12 things is hosted by a different speaker, so this means that each section is only five minutes long (Strictly guarded by Debra Lilley).
Thankfully I was chosen to be one of the speaker during this special session, very excited and also very scared. (more...)

Order, Order.. Sorting Happens Last

While preparing for my session at Oracle Open World on "Oracle 12c for Developers" I ran into a little remarkable thing.

When sorting a dataset, the sorting is always done last. That is what I was taught anyway. There is probably some obscure way to detect the exact execution plan, but personally I never bothered to go and investigate.
When I was created some test scripts I found there was a way to see that (more...)

APEX 5: Using Font Awesome Icons in Report

APEX 5 is currently in Early Adaptor 2, so the exact implementation of this blogpost might change when APEX 5 goes GA.
Font Awesome is standard included with APEX 5 and you can use the icons on buttons, there is a special property for that.
I was playing around the other day and I wanted to include some Font Awesome icons in my report.
First create a report (classic or interactive, whatever you want) and (more...)

APEX_ESCAPE, a new (and better) way of HTF.ESCAPE_SC

Last week, at the yearly ODTUG Kscope Conference, I did my presentation "Getting Started with APEX Plugin Development". After the session Patrick Wolf, Principal Member of Technical Staff for APEX, pointed out an improvement that could be made.
In the presentation I point out the need to escape the input that you get from a user of the plugin in order to protect the plugin from unwanted use, like SQL Injection, Cross Site Scripting (more...)

ODTUG Kscope 2014: Wednesday

The morning started nice, ODTUG organized breakfast with country themes. There were tables for Australia, Canada and The Netherlands. If you are Dutch you might have expected to have hagelslag or cheese, this was not the case. It was a nice and hearty American style breakfast, eggs, bacon, potatoes.
The first session of the day that I went to was by Nathan Catlow on Oracle APEX Security, an interesting topic.
Nathan pointed out that by (more...)

ODTUG Kscope 2014: Tuesday

Mark Drake, the product manager for XMLDB and the new JSON features in the database, started Tuesday with a session on flexible storage.
After a short history of the XMLDB ("more than just a LOB Store"), he went to the heart of the presentation: flexible storage.
In the upcoming release of the database there will also be JSON functionality built in. The JSON functionality won't have a separate datatype. By not introducing a separate JSON (more...)

ODTUG Kscope 2014: Monday

Monday morning started with the opening keynote. At the same time the Dutch soccer team played Chile (which the Dutch won with 2-0). A small Dutch delegation went to watch the game, all dressed in orange, I was one of them.
During the keynote the location of Kscope 2015 was announced: Hollywood, Florida.
Lunch was special, there were lunch and learn. There were "reserved" tables were you could sit on and talk tech with ACE (more...)

ODTUG KScope14 Sunday APEX Symposium

The ODTUG Kscope conference always starts with a full day symposium. There are several specialized tracks going on, and I attended the APEX track (mainly).
The room was packed, I would estimate around a 175 delegates.
Joel Kallman started the day with an overview of the history of APEX, including a video of Steve Balmer being very enthousiastic about APEX. He also told a bit about the background and how some features evolved throughout the (more...)

Finland: OUGF Harmony 2014

Last week was the annual conference for the Oracle User Group Finland. This time the conference was at the Finnish Nature Center called Haltia. Needless to say that the location was beautiful.
Even though the conference started on Thursday, most speakers flew in on Wednesday. Heli, the president of the OUGF and dear friend, acted as a tourguide and showed Helsinki. The tour ended with a dinner at a Viking restaurant where the food (more...)

Current_Schema and the Data Dictionary

Being a huge fan of Logger, the PL/SQL logging utility, I really wanted this be to included in the project that I'm currently working on. So I downloaded it (link at the bottom of this blog) and included it in our deployment scripts. Done.... at least I thought so, but of course this wasn't the case.

The regular install script for Logger looks something like the following (parts removed and table names are changed):


set (more...)

Bookreview: Oracle APEX Cookbook – 2nd edition by Marcel van der Plas and Michel van Zoest

A few weeks ago Packt Publishing asked me if I would give a book review for the recently released Oracle APEX Cookbook, the second edition by Marcel van der Plas and Michel van Zoest. In exchange I would get the e-book for free, so this can be considered a sponsored blogpost. Even though it is sponsored I will give my honest opinion about it.

The book contains fifteen chapters starting with "Creating a Basic APEX (more...)

Triggering and Handling a Custom Event in APEX

On one of the pages there was a need to refresh a report region when a node in an APEX Tree was clicked. As far as I know there is no built-in method to create a Dynamic Action to a node in an APEX Tree, so this might call for a Custom Event.
If there is a built-in method, please leave a comment :)

Trigger Custom Event

To trigger a Custom Event, change the "link" (more...)

Invisible Not Null Column

Yesterday I attended John King (@royaltwit) session on Oracle 12c for developers. He gave an overview of all the goodies that are available to us as developers. The whole plugging and unplugging of database, though very cool and exiting, is most likely not very relevant to most developers.
When he (more...)

APEX Tree based on Pipelined Table Function

Representing hierarchical data in an APEX Tree is fairly straight forward, the wizard to create a tree region assists you with that. But when you need to show data from multiple tables, you will need to provide your own query. In a previous blogpost I have written how to achieve (more...)