Skip to main content

Travelling back from New Orleans


From the Sheraton to the airport I shared a cab with Carl Backstrom and arrived around 2 hours before the scheduled departure. I only had a 37 minute transfer time in Houston so I had picked a chair in the front of the plane - just after the business class. The plane left the gate exactly on time, but it stopped on the runway. Due to a thunderstorm the airport closed for 30 minutes....
So when I got out of the plane in Houston my transfer time was reduced to -2 minutes. The plane to Amsterdam was somewhere at the same pier - but that pier is really huge. So I started the 1 kilometer walk without any (positive) expectations. But to my suprise that plane was scheduled 45 to 60 minutes later! I've never been so happy with a delay....
The flight was o.k. In the 10 hours flight I snoozed a little and arrived in Amsterdam at the original scheduled time. My wife and daughters waited there for me, so it was a good homecoming!

Comments

Carl Backstrom said…
I still owe you three bucks extra for the cab ride ;) , next time I'll buy you a beer to pay for that and the interest :D
Roel said…
Ok Carl. I'll keep that in mind!
Anonymous said…
Roel,

My plane was one of the last to take off in that thunderstorm before they shut it down.

At one point I thought "He (pilot) has to turn back", but we just kept flying further and further into the darkness!

That was a heck of a storm (especially 10,000 feet up)!

John.

Popular posts from this blog

Filtering in the APEX Interactive Grid

Remember Oracle Forms? One of the nice features of Forms was the use of GLOBAL items. More or less comparable to Application Items in APEX. These GLOBALS where often used to pre-query data. For example you queried Employee 200 in Form A, then opened Form B and on opening that Form the Employee field is filled with that (GLOBAL) value of 200 and the query was executed. So without additional keys strokes or entering data, when switching to another Form a user would immediately see the data in the same context. And they loved that. In APEX you can create a similar experience using Application Items (or an Item on the Global Page) for Classic Reports (by setting a Default Value to a Search Item) and Interactive Reports (using the  APEX_IR.ADD_FILTER  procedure). But what about the Interactive Grid? There is no APEX_IG package ... so the first thing we have to figure out is how can we set a filter programmatically? Start with creating an Interactive Grid based upon the good old Employ

apex_application.g_f0x array processing in Oracle 12

If you created your own "updatable reports" or your custom version of tabular forms in Oracle Application Express, you'll end up with a query that looks similar to this one: then you disable the " Escape special characters " property and the result is an updatable multirecord form. That was easy, right? But now we need to process the changes in the Ename column when the form is submitted, but only if the checkbox is checked. All the columns are submitted as separated arrays, named apex_application.g_f0x - where the "x" is the value of the "p_idx" parameter you specified in the apex_item calls. So we have apex_application.g_f01, g_f02 and g_f03. But then you discover APEX has the oddity that the "checkbox" array only contains values for the checked rows. Thus if you just check "Jones", the length of g_f02 is 1 and it contains only the empno of Jones - while the other two arrays will contain all (14) rows. So for

Stop using validations for checking constraints !

 If you run your APEX application - like a Form based on the EMP table - and test if you can change the value of Department to something else then the standard values of 10, 20, 30 or 40, you'll get a nice error message like this: But it isn't really nice, is it? So what do a lot of developers do? They create a validation (just) in order to show a nicer, better worded, error message like "This is not a valid department".  And what you then just did is writing code twice : Once in the database as a (foreign key) check constraint and once as a sql statement in your validation. And we all know : writing code twice is usually not a good idea - and executing the same query twice is not enhancing your performance! So how can we transform that ugly error message into something nice? By combining two APEX features: the Error Handling Function and the Text Messages! Start with copying the example of an Error Handling Function from the APEX documentation. Create this function