Skip to main content

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 Page Load the value is set to 'Y', so the next search will be executed. But as said, this is good, but not good enough...

So this morning I was looking for a solution to "force" the user to enter a query on one of the columns - either through the "search bar column list" (the magnifier on the left side of the search field) or through the Actions > Filter menu. The first attempt was to use a Dynamic Action that fires on change of the search field, but that doesn't work when the user switches existing filters on or off. So I inspected the debug output of the page and discovered an item named "APXWS_EXPR_1". This item is set when the report is refreshed and contains the value of the first column filter you apply. Subsequently you can have APXWS_EXPR_2 etc. So I added an additional restriction to the query: 

:APXWS_EXPR_1 IS NOT NULL

Thus by just adding one line to the query the user is forced to use at least one column filter - both the "contains" as any other more specific filter works. And I can even delete the previous solution that prevented running the query (actually the query is run, but returns "no data found" in no time) when the user navigates to the page.

As a side note, if you use the general filter on all columns, that value is available on the server as "APXWS_SEARCH_STRING_1" (and _2 etc.)

Post a Comment

Popular posts from this blog

Refresh selected row(s) in an Interactive Grid

In my previous post I blogged about pushing changed rows from the dabatase into an Interactive Grid. The use case I'll cover right here is probably more common - and therefore more useful!

Until we had the IG, we showed the data in a report (Interactive or Classic). Changes to the data where made by popping up a form page, making changes, saving and refreshing the report upon closing the dialog. Or by clicking an icon / button / link in your report that makes some changes to the data (like changing a status) and ... refresh the report.  That all works fine, but the downsides are: The whole dataset is returned from the server to the client - again and again. And if your pagination size is large, that does lead to more and more network traffic, more interpretation by the browser and more waiting time for the end user.The "current record" might be out of focus after the refresh, especially by larger pagination sizes, as the first rows will be shown. Or (even worse) while you…

Using multiple Authentication Schemes for your APEX application

Recently someone asked me how he could implement multiple authentication schemes for his APEX application. He would like to use (some kind of) Single Sign-on authentication and - as an alternative - an Application Express Authentication. The problem is ... you can only define one Authentication Scheme being "Current" for an application! So how can we solve this issue?

First, we need te be aware that multiple applications can share their authentication by using the same cookie. Thus if you specify "MYCOOKIE" as the Cookie Name in Application A as well as in Application B, you can switch from A to B and back without the need of logging in again. It doesn't matter what Authentication Scheme Type you are using!

Knowing this, we are halfway our solution. We need two Applications. One - the "real" application - using the Application Express Authentication, let's name this one "LAUNCHPAD". And another one using the Single Sign-on Authentication…

Dockerize your APEX development environment

Nowadays Docker is everywhere. It is one of the main components of Continuous Integration / Continuous Development environments. That alone indicates Docker has to be seen more as a Software Delivery Platform than as a replacement of a virtual machine.

However ...

If you are running an Oracle database using Docker on your local machine to develop some APEX application, you will probably not move that container is a whole to test and production environments. Because in that case you would not only deliver a new APEX application to the production environment - which is a good thing - but also overwrite the data in production with the data from your development environment. And that won't make your users very excited.
So in this set up you will be using Docker as a replacement of a Virtual Machine and not as a Delivery Platform.
And that's exactly the way Martin is using it as he described in this recent blog post. It is an ideal way to get up and running with an Oracle database …