Category Archives: Science

Anthropology, physics

Querying Active Directory Through Oracle

The Fisherman DBA

It’s usually easy to tell when a muskie fisherman in another boat sees a good sized fish.  He’ll usually use the trolling motor to slowly move around a small area, picking it apart from different angles with his casts.  He may stay in an area of 100 square yards for a couple hours, trying to find the right presentation and angle to get the follower to bite.  Seeing a big fish follow your bait to the boat is exciting, but if you want to catch more of these followers, you need to be ready to change go at them with something different.  If bucktail gets them to follow lazily, try a jerkbait.  If casting from shallow water brings them in too late, try casting from the deep.

In my previous post, I showed how to query Active Directory from SQL Server.  This was nice and easy to do; since they’re…

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Getting and setting Apex page item values using $v(), $s(), $v2()

Christoph's 2 Oracle Cents

The Apex JavaScript API has some very convenient functions to access the values of page items.

For example, if you wante to access the contents of a text field with JavaScript, would would need to reference it something like this:


If the item you want to reference is a display only item, then the syntax changes:

x = $("#P2_DISPLAY_ONLY").text();

If you need to set the values of these items, the you need to use the varying syntax as well:

$x("P2_TEXT_FIELD").value = "Hello World!";


$("#P2_DISPLAY_ONLY").text("Hello World!");

Dealing with these various syntax constructs can be confusing. Fortunately the Apex JavaScript API makes this process much easier. To get page item values simply use $v(“<item_name>”):

x = $v("P2_TEXT_FIELD");
y = $v("P2_DISPLAY_ONLY");

To set the item values use:

$s("P2_TEXT_FIELD","Hello World!");
$s("P2_DISPLAY_ONLY","Hello World!");

See an example on my demo page.

The $v2() is handy if you need to access multiple items in…

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Viewing APEX Mail Log and Queue


Run these from APEX SQL Workshop:


The next one will normally be empty, unless just prior to a queue purge (every 15 min?) or an error happened, then it will be retried 10X before finally being purged:


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APEX 5.1 – Interactive Grids – Controlling Allowed Operations

Johns Blog

In the last post I showed how easily you can enable an Interactive Grid for editing, however what if you want to only allow the user to edit certain rows?

Lets imagine a scenario – given the standard EMP table, I should only be able to change the salary of Employees who report to me (i.e. I can’t change the salary of an employee if they report to someone else).

So, let’s create an Interactive Grid with the following query –

Now, for the purposes of this example, given the hierarchy of the EMP table –

I’m going to “pretend” to be BLAKE – since BLAKE is the manager of 5 people.

If you look at the properties of the Interactive Grid you’ll see the “Allowed Row Operations Column” setting, this allows us to define a column in the query which will be used to define whether I can Update…

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