Skip to main content

A Better Method

Just posted a new Tip over on sumneva.com that deals with quickly creating a package that can manage all DML transactions against a table or tables.

I came across this feature in the days of APEX 4.0 EA1.  I immediately thought that it was a new APEX 4.0 feature - until I checked 3.2, and it was there too.  Basically, this allows you to easily create a table API which can be used to replace the built-in APEX DML processes.

Why would you do this?

If you wanted to create a more secure architecture, you may want to have a tableless schema - thus, the built in processes will do you little good.  This API can live in a separate schema, and facilitate all DML calls used to manage your data.

Since it's in a PL/SQL package, you can easily add additional security or data integrity checks before performing any of the DML transactions - another major reason to consider this approach.

Comments

Patrick Barel said…
Maybe you could check out the QDA (Quest Development Architecture) available in QCGU (Quest CodeGen Utility) at http://codegen.inside.quest.com/index.jspa
Anonymous said…
Also someone did a long time ago but never...
http://www.danielmcghan.us/2008/07/tapigen-demo-app.html
Anonymous said…
also forgot his source code website too..
http://sourceforge.net/projects/tapigen/
Thanks for the tip Scott I have had questions from people on this type of setup for some time, and no really good answers. Now this one bears a little experimentation. :")
Scott said…
I do remember now that this feature was built WITH Dan's TapiGen APIs. Dan - if you're watching - can you confirm?

- Scott -
Joel R. Kallman said…
>> I do remember now that this feature was built WITH Dan's TapiGen APIs. Dan - if you're watching - can you confirm?

Really? That's odd. The date on Dan's code is 2008, the APEX TABLE API generator was written in February 2003. And the code between them is completely dissimilar. Dan's is way more sophisticated.

Sorry, but I don't think that statement is accurate at all.
Scott said…
I stand corrected.

Thanks, Joel.

- Scott -
Ino said…
Scott

I saw your ODTUG webcast about this subject, and tried it out myself. I think that this API is really too simple to use. E.g. for an update it doesn't take into account the columns you actually want to change, so the others may turn up as NULL after the update.

Also, the API cannot (easily) be used in a tabular form.

One of the suggestions in the webinar was to use views with instead of triggers. That could be a better solution.

Ino
Scott said…
Ino,

If you pass all parameters back to the API, then they should all be updated. If you NULL some of all of them out, well, then your data will also reflect that.

Keep in mind that the example that I used is just one example; you could likely build an API generator that is more robust and suits your specific needs in no time at all.

I am not a huge fan of Instead of Triggers, as there is no way to rollback anything, should something fail. For example: how would you handle lost update detection?

Thanks,

- Scott -

Popular posts from this blog

Whose Deck is it Anyways?

This year at KScope, we're going to try something new.  And fun.  And funny to watch - we hope.  It's called "Whose Deck is it Anyways?", and will occur on Sunday at 8:30pm.  It's only 30 minutes, but it will likely be the best 30 minutes of the conference.  Or at least the most embarrassing.

Here's what we're going to do: the will be four 5-minute presentations - one on each of the following: BI, EPM, Database & APEX.

Sound interesting?  Probably not.  We get that, too.  So here's what we did.

Each 5-minute session will be presented by a non-expert.  For example, it's highly likely that I'll be presenting on BI or EPM.

To make it even better, each slide deck will be prepared by the corresponding expert.  So again, it's highly likely that my slide deck's creator will be either Stewart Bryson or Edward Roske.  If nothing else, this session will be a crash course in how not to make cohesive, easy to read slides.

Interested now?  Ya,…

Spaced Out

A while back, I wrote about how to give the Universal Theme a face lift.  If you follow the steps in that post, the base font for an APEX application with the Universal Theme can easily be changed.

While that's all well and good, sometimes you only want to change the font for a report, not the entire page.  One of the applications that I'm building contains a number of IRs based mostly on log data.  Thus, having that data in a monospaced font would make it a whole lot easier to read.

You can search Google Fonts for monospaced fonts by selecting only that option on the right-side menubar.  You can also opt for the standard yet kinda boring Courier and achieve the same thing.

To implement this in your application, follow the steps in my other post, but stop shy of the final step.  Instead of pasting in the text that I specify, paste in the following to the Custom CSS field in Theme Roller, using the name of the font you selected for the font-family:

.a-IRR-table tr td { font-fam…

#fakecode

Unless you've managed to somehow filter out everything about US politics over the last few months (and if you have, please let me know your secret), then you've likely heard about "fake news".  From a high level, my basic understanding of "fake news" is that it refers to stories or websites that are fabricated to advance the political beliefs and/or ideologies of one site or the other.  Your definition may differ.

So what is fake code?  That, I can at least try to explain in a bit more detail.

The other day, I saw this image posted on Kris Rice's twitter feed:



I thought it was a joke, but it's actually a real book. That made me laugh.  Then cry.  Then I read the book, mainly since it's only 4 pages.  Believe it or not,  there's actually some really good content packed in there.  Let me summarize:

If you choose to copy code from Stack Overflow, the OTN forum, or anywhere, really, there's a few things to keep in mind:


Who owns the code.  It…