Wednesday, August 26, 2009

A trip to Australia, Singapore, Seoul

I wrote this a few days ago...] Once again, at 35000 feet, on my way from Tokyo to LA - returning from two weeks in "APAC" - Asia Pacific theater. I spent a week in Australia (Sydney, Melbourne and Perth) then three days in Singapore and finally a very fast day in Seoul. All because there were enough Oracle developers in each of these locations who actually wanted to listen to what I have to say. What a lucky fellow I am!

Here's a recap of the highlights of my trip....but first, you can see all my photos at:

Australia: http://www.flickr.com/photos/60694364@N00/collections/72157622028021941/
Singapore: http://www.flickr.com/photos/60694364@N00/sets/72157622027981843/
Seoul: http://www.flickr.com/photos/60694364@N00/sets/72157622152297286/

Looooong flight from San Fran to Sydney, but I got lucky and they put me into a premium economy seat (Qantas), so I slept for 5 hours and worked for 8. Arrived Monday morning and headed over the Quest office. My big public event was on Tuesday, but Monday evening I presented a PL/SQL Quiz to the Sydney Oracle Meetup group organized by Alex Gorbachev. That was fine. I got to drink some beers first, so that my explanations were properly slurred. And, as is so often the case, I made my quiz questions too hard. Out of the 25 people there, the best anyone could do (3 people) was 5 out of 10 right. So then we did a tie-breaker. I figured the tie-breaker was for the really sharp folks. So my first tie-breaker question was:

Explain which feature of PL/SQL is related to this number: -24381

They just laughed at me. Are you laughing, too? Sure, it's obscure...but I bet some of you know the answer. Oh well....anyway, someone finally won - a copy of my soon to be released Oracle PL/SQL Programming 5th edition (up through Oracle 11.2).

Well, my seminars in Sydney, Melbourne and Perth went very well. Sponsored and organized by the AUSOUG, we had lots of enthusiastic attendees and many excellent questions. I renewed my acquaintance with several Oracle ACEs (and ACE directors) including Tony Jambu and Chris Muir. I like Australia. Not only are the folks generally friendly, but there is lots of interest in PL/SQL and many advanced developers. My kind of country.

I didn't have much time to wander around Sydney or Melbourne, so my photos are very "hit or miss"....

I visited Perth for the first time (western edge of that enormous island continent) and presented to some 100 Oracle technologists on Friday. They were very pleased to have me there - apparently very few people ever bother to go to Perth. But when they do - the weather stinks. "Oh, Perth is great - warm and sunny," they told me. I arrive and find it overcast and windy. On Saturday, my free day....40 km/h winds! Apparently Tom Kyte had the same bad luck. I presented from 9 to 4, more or less, and very few people fell asleep. We played Set and Mastermind, and did some PL/SQL, too. It was a great day.

And the poor weather was not going to hold me back. I walked all over, discovered the impossible triangle, enjoyed the Art Gallery of Western Australia, and spent some time in Kings Park. In East Perth, I came across a remarkable sculpture of an "impossible triangle" devised by Sir Roger Penrose in the 1950s. As you move around it, the different unconnected edges gradually merge into what appears to be a triangle with "one side". Penrose's work served as inspiration for a number of M.C. Escher pieces.

You can check out my impossible triangle photos at: http://www.flickr.com/photos/60694364@N00/sets/72157622026683017/

Many thanks in particular to Chris Muir and Conner McDonald (they sacrificed a night of their lives to have dinner with me - and Chris even let me hold and snuggle with his three month old baby), as well as the rest of the AUSOUG officers and volunteers who made my events a success! Thanks as well to Ling, Silvana, Ceci, Alf and others at Quest Australia who helped make the week such a fine and productive time.

Then on I went to Singapore. I must admit: I really like Singapore. I like the weather (hot and humid), so much like Puerto Rico. I like the people: all sorts of people from all over, very informal, very easy going, great sense of humor. I even like the way the society it works - it's not a democracy; there is no free speech (though there is, I discovered a Speakers Corner, kind of like in London, where people can openly complain, once they get permission from the nearby police station). Instead, the government offers a trade: we will give you a decent quality of life, subsidizing housing, health care, public transport, etc. - and in exchange, YOU WILL BEHAVE. Criminals are treated most severely and lots of things are crimes. I am not saying I want the US to be like this, but it is lots easier to criticize such a setup from afar. From inside, it seems pretty nice. As long as the economy goes OK, and they have been hit hard, being very dependent historically on the US and UK financial industries. Hopefully the recovery is under way.

But there sure are lots of enthused PL/SQL developers. The Quest folks told me that even before they sent out the first email invite, they had people calling to reserve their seats. They had a waiting list of over 20 people, who kept calling: "Can I attend? Can I please attend?" I did a full day of presentations (same as in Perth) and then that evening I was to fly off to Seoul (red eye). After the event was over, Jason and Mark were asking me: "Have you ever had a foot massage?" Well, sort of but not really. So off we went - I got a foot massage, then a great dinner of chili crab (a Singaporean classic - very tasty and very very messy), then back for another full body massage that was just fantastic - then off to the airport....8 hours later, I arrived in my hotel room in Seoul (9 AM). Got a few hours sleep, anyway.

Before continuing with my "saga".....many many thanks to Clara, a truly professional and highly competent events organizer. Once again, she did a fantastic job pulling the third Oracle Experts Day together. Thanks also to Jason, Mark, Stanley, Beth and everyone else in the Quest office for making my stay so enjoyable (Beth even let me drive her car! Crazy lady!). And finally, most of all thanks to Gayathri for being so generous with her time and not only driving me to the Night Safari but even spending the evening walking around there with me.

See you again in 2010!

My last day was in Seoul - just one day, which was most unfortunate. But we put it to good use. They (Chaeyoung, Jihee, Jackson, Yuji and everyone else) pulled together an event of 100 people - which is very remarkable, considering that very few people are comfortable with English there, so we needed a translator (who apparently left much to be desired), and of course that reduces the number of people who will attend. It certainly reduced the numbers of words I could speak and and number of demonstrations I could do. But we had pocket references for everyone and I even remembered to bring my business cards, so I signed lots of books and mostly got the names right, and correctly offered my business card to many. Everyone seemed pleased with the results.

They told me in advance: plan to wear a suit and bring your business cards. I did both - and then ironically Raymond, the Quest country manager, showed up for lunch and the evening presentation dressed in a polo shirt, jeans and sneakers. "This is an event for developers!" he said. "They don't get dressed up." So I was dressed like a sales manager, and he was dressed like a developer. I was very jealous.

He also make a point in his introduction to tell people how old I am (just about to turn 51). People generally say that I look younger than my age, but I found that in Singapore and Korea, they were really blown away by my age. In Singapore, over and over people said "I can't believe you are 50." But usually they don't bother to mention it in the introduction. Jihee, Quest marketing manager, explained that in Korea alot of respect is paid to the elders. So I think that Raymond felt that it was important to tell people (mostly young developers) that I was actually OLD - and they should therefore listen to what I had to say. OK!

And the folks at Quest took very good care of me, taking me out to lunch (Mongolian - excellent food) and then dinner at a famous, traditional Korean restaurant. I was told (by friends in the US) to expect to drink lots of soju (Korean whiskey), get very drunk, and sing karaoke. Instead we had a seemingly endless delivery of very tasty and interesting dishes, along with some rice wine, and no one insisted that we go out and sing. Maybe that's because they knew I was running on 3 hours of sleep, and had to leave the next morning at 8:20.

So that's it. Two weeks away from home, and I added another country to my list of those I have visited (South Korea). I spoke directly to something like 400 developers and hopefully will have a ripple effect on many more. I greatly enjoyed visiting Perth and Seoul for the first time, and enjoying once again Sydney, Melbourne and Singapore.

I remain amazed, deeply gratified and feeling just downright lucky that so many people are interested in hearing what I have to say and reading what I write (both book-wise and code-wise). My deepest thanks to all those who organized the events and all those who feel they have something to learn from me.

Thursday, August 13, 2009

Another idea for more equitable pay distribution

A long time ago, on my old and very colorful website (thanks to the artwork/design of Chris Silva, my son), I offered my thoughts about excessive executive compensation and an idea for avoiding the enormous gaps between rich and poor in our supposedly democratic country: 25X&NOMORE. Here's the basic idea:

The highest-paid employee of your company shouldn't earn more than 25 times what the lowest-paid employee is paid.

Why would I suggest something like this? Because we have a serious problem in this country:

"The pay disparity between CEOs and U.S. workers is increasing to alarming levels. In 1965, CEOs made 44 times the average factory worker's salary. Today, CEOs make 326 times the average factory worker's pay."

Oddly enough, corporate America has not heeded my call. Nor has Congress. Ah well...sometimes all you can really do is be a prophetic and wise voice in the wilderness. This makes you (and pretty much no one else) feel a little bit better.

I recently came across another effort to achieve similar goals: Open Year ("It's good to share."). It's quite different from my idea, depending on social networking and influence models. I think you will find it interesting and I encourage you to check it out.

Sunday, August 09, 2009

Travel tip: Big fat neck pillow great for feet!

I am flying from San Francisco to Sydney. Fourteen hours. Not fortunate enough to be upgraded to business class. And when flying coach and trying to sleep, I find that one of my biggest problems is finding a comfortable position for my feet. If I plant them flat on the ground, my legs are not relaxed and it is hard to sleep. If I stretch them out (as far as the seat in front of me will allow, anyway), then my feet dangle forward or to the side and they end up stressing my ankles. Keeping me awake and needing to shift position.

Who knows? Maybe somebody out there somewhere sells something specifically for this problem. I have not found it. I have found, however, an alternative that works really well.

Lots of companies sell inflatable neck rings that are supposed to help support your head and make it easier to sleep. One particular such ring is big and fat: the Komfort Kollar.

I don't find it all that useful to wear around my neck. I recently realized, though, that if I put it on the floor in front of me, I can comfortably nestle my feet in and on the ring. I can then sleep more easily. Simple, cheap solution to a vexing (at least to me) problem.

OK, three more hours to Sydney! I slept for about 5 hours and now I am wide awake and ready to type type type. So far on this trip I have:

* written my latest ODTUG magazine column, Confessions of a Quick and Dirty Programmer
* put together a quiz and answers for my Sydney Oracle Markup presentation and pizza for later this evening
* continued enhancing the Code Tester backend to support automated testing of object types
* eaten too many sweet snacks
* written a bunch of Q&As for a database of quiz questions I am constructing (about which you will hear lots more very soon)

Back to work!

[ And now I am in my hotel in sunny, bright, too-cool Sydney, after some 25 hours of flying...time to exercise, eat breakfast, and head to the Quest office! ]

Tuesday, July 28, 2009

Photos and t-shirts by two fabulous artists

The two fabulous artists: my son Chris Silva and his wife Lauren Feece.

They recently created an installation on the beach in Puerto Rico. Photos here.

Chris has also put several very nice designs on t-shirts, which you can order here.

Sunday, July 12, 2009

Corporate Stockholm Syndrome

For most of us, a job constitutes a straightforward, though often very unpalatable trade-off: you, the employee, hand over enormous chunks of your life (time and sentience) to a corporation, and your employer hands you back some money.

Needless to say, for the vast majority of people in this world, it's a poor trade. They work exceedingly long hours, endure poor to horrible working conditions, and are paid ridiculously small amounts of money.

Yet there is clear evidence to suggest that after an extended period of time, employees develop a Stockholm Syndrome-like response to their employers. They become grateful for the smallest crumbs that are handed to them. Here is an example I recently came across....

===============================
Improving employee morale with incentives a challenge in tough economic times
By Wailin Wong | Chicago Tribune reporter

ThoughtWorks, a Chicago-based information technology consulting firm, gives its employees a three-month paid sabbatical when their tenure reaches 10 years.

Nancy Kistler took her leave last summer after 14 years at the company, where she oversees several large client accounts. Instead of traveling around the world like some of her colleagues, Kistler stayed home in Grand Rapids, Mich., with her two young children. It was a welcome break after having traveled weekly for 14 years.

"I was really thankful for getting that opportunity because you don't get that anywhere these days, and having it be fully paid makes a huge difference," Kistler said. "To me, it really said a lot about how I'm valued by the company."
=================================

And there you have it, folks. This woman spends FOURTEEN YEARS traveling every week for her company (and I am sure paid quite well). For at least several of those years, she is separated from her children for a large part of the time.

And she ends up being really thankful for three months of time with her family.

I guess it's a whole lot better than being bitter.

Friday, June 26, 2009

Another most excellent ODTUG

I am just back from the latest ODTUG (the Oracle Development Tools User Group) Kaleidoscope conference, this time in Monterey, California. It was, as usual, a very well-run and successful event (their attendance actually grew from 2008, which is saying an awful lot given the state of the global economy).

It is easy to pick out the highlight of the conference for me: the ODTUG board of directors very graciously bestowed upon me their first Lifetime Achievement Award. Here, I can prove it to you with (what else?) Twitter: http://twitter.com/odtug/status/2273902345

[ How did we ever get by without Twitter? Aw, just kidding. I do without Twitter every single day of my life. :-) ]

Anyway, back to the seriously wonderful stuff: I was very honored by ODTUG and deeply appreciate the award, except I have to wonder if the "subtext" of the award is "Enough already, Steven. Time to chill out and let other people have their way with PL/SQL."

Maybe, maybe....I will give it some thought - after I finish the next edition of Oracle PL/SQL Programming (due out in October at Oracle Open World), implement object type support for Quest Code Tester, wrap up my best practice video series on PL/SQL Obsession, and come back from my Asia-Pacific summer tour (Australia, Singapore and Seoul).

Of course, I don't like ODTUG just because they treat me so nicely (oh, and they have also agreed to let me publish a regular column named "Confessions of a Quick and Dirty Programmer" in their magazine). This is my favorite user group organization precisely because of its focus on developers. At a time when Oracle barely seems to remember that it has this great programming language (excepting the PL/SQL dev team, Oracle Magazine and OTN, of course), ODTUG offers an annual love fest for PL/SQL developers.

Hmmm, actually two love fests: the general ODTUG Kaleidoscope conference (it covers much more than just PL/SQL) and the annual Oracle PL/SQL Programming conference (it covers nothing but PL/SQL). OPP2009 will take place on Nov 10-11 in Atlanta. It will feature an expanded agenda, which means that, more than ever before, if you are looking for an intensive training in PL/SQL, OPP2009 is the best place to spend your scarce training dollars.

Enough shameless promotion of a conference for which I am technical co-chairperson.

So....thanks once more to the ODTUG board and its many fantastic volunteers, as well as Your Conference Connection, which does the on-the-ground organization of ODTUG events. Special kudos to Jeff Jacobs, Kaleidoscope conference chairperson, Mike Riley (ODTUG president, and husband of the very delightful Lisa Riley, with whom I had several excellent conversations) and Kathleen McCausland, ODTUG executive director.

If you've never attended a Kaleidoscope or OPP conference and you are a PL/SQL developer, I strongly urge you to get them on your calendar ASAP.

Wednesday, June 10, 2009

Quest Code Tester for Oracle 1.8.3 Now Available

Version 1.8.3 of Quest Code Tester (the most powerful automated testing tool for PL/SQL currently available, and my main obsession these days) is now available for downloading from Quest's on-line SupportLink (after being prompted to log in you will be taken directly to the download page). If you write PL/SQL code or manage a team that does so, you really owe it to yourself to check out this tool. Thirty-day free trial available at www.quest.com/code-tester-for-oracle.

I strongly urge all Code Tester users to upgrade to this version. It is, without doubt, the most stable and richly-featured release of this automated testing tool.

Of course, you would expect that it would have more features, which I detail below. How, you might ask, can I be sure to make my claim of "most stable"?

Very simple: because for 1.8.3, we finally "ate our own dog food" in a very big way and constructed an automated regression test of the backend functionality of Quest Code Tester.

You might have thought that since this is an automated testing tool, we would have done this from the very start. Yes, that would have been ideal, but so little about our lives are ideal, would you agree?

Certainly, we used Code Tester to test elements of the backend right from the beginning, but that is a different thing from building anything approaching a complete and automated regression test.

That is the most important new "feature" of 1.8.3, and we did it by creating a new utility to complement (and eventually be folded into) Code Tester, which we are calling Test Launcher. I talk more about Test Launcher in a follow-on post to this blog. We will soon be posting Test Launcher on the Code Tester community library in the Downloads and Upgrades section. You will all be able to use Test Launcher yourselves (though initially it will not be supported by Quest Support - you will need to report issues through the community).

New Features in 1.8.3

Besides fixing over 75 bugs, we added some very nice new features. The following information is also available in the release notes.

New Export/Import Architecture

Code Tester now writes export files as an XML document. It will import both the legacy ".QUT" export files as well as the new .XML formatted files. Merging is now only supported for XML exports. The new export format will be much more reliable and easier to support.

Expanded Set of "Hooks"

Code Tester now offers a greatly expanded set of hooks via the my_codetester package to customize the behavior of Code Tester at key points like before and after import, before and after running a test, etc.

Reports for Suites

All reports defined for individual test definitions are now available for suites as well.

View All Test Definitions in Test Dashboard

You can now change the schema selector to "All Schemas" so that you can see the list of all test definitions to which you have access (run and/or edit) at once, without changing the selected schema.

Use Windows Name to Track Changes to Test Definition

You can use the my_codetester package to specify to Code Tester that the "created by" and "changed by" audit columns on test definition tables be populated with the name of the Windows user, rather than the Oracle schema name returned by the USER function.

Test Package Formatting on Demand

Code Tester will no longer automatically format the generated test code (this will improve overall performance of generation). You will now need to explicit request a format and recompile in the Test Code tab of Test Editor.

Improved Support for Wider Set of Datatypes

Code Tester will now allow you to create test definitions properly for all kinds of timestamps and intervals. You can also create a test definition for an object type, though you will still need to write the actual test logic yourself.

Wednesday, June 03, 2009

Hurrah for Barack Obama: another step towards normalization with Cuba

How very exciting! The U.S. policy towards Cuba has been an obscenity for decades, even to the extent of supporting and allowing acts of terrorism on our own soil by so-called Gusanos (worms) against other Cubans supporting the Castro government. Normalization with Cuba would be a big step towards a new, less imperialistic era of relations between the US and Latin America.

OAS revokes 47-year-old suspension of Cuba

SAN PEDRO SULA, Honduras (CNN) -- The Organization of American States on Wednesday revoked a 1962 decision suspending Cuba from the multinational group.Patricia Rodas, the minister of foreign relations for Honduras, made the announcement at the conclusion of the two-day meeting of the 35 member nations.The United States, which led the push to suspend Cuba at the height of the Cold War, was represented at the meeting by Secretary of State Hillary Clinton.U.S. officials had no immediate comment.

Force me to take a break, will you?

Two of the biggest problems we developers have are (a) we are addicted to writing software and don't want to stop, and (b) we generally think we're pretty sharp people and can solve any problem that comes our way.

Why are these problems? Because the net result is that we tend to work too hard and too long without breaks, with a resulting reduction in code quality. This dynamic is particularly obvious when it comes to fixing a bug.

I don't know about you, but when something is demonstrably wrong with my code, I feel nothing short of a compulsion to find the cause of the bug and fix it. Now. Immediately.

But, of course, most bugs are not fixed immediately. Instead, I analyze my code, I run traces, I try this, I try that. My back starts to ache. My eyes get all squinty. I thirst, I hunger, but I cannot, will not stop until I get my code running....

BAD IDEA! If you can't fix your bug quickly, say within 15 minutes, there's a really good chance you won't find it for hours - if you don't take a break. The problem is that we can get too deep inside the code and replace perspective with urgency.

A much better idea is to take a break, get up, drink a big glass of water, move around, stretch, run around the block, take a nap - do anything to stop thinking directly about your problem. Instead let your brain take a break and think "for itself." There's a really good chance that the solution will just "pop" into your head by the time you sit yourself back down in front of your screen.

Of course, when you are desperately engaged with your code, it can be hard to muster the discipline to step away. In those situations, it's nice to have someone or something remind you that it's time for a break.

A few days ago, I got a note from Danilo, who said:

"I always read your personal blog, and i find it really interesting and full of useful tips. So today i would like to share an application that really helps my way to code and relax. I do take lots of breaks during coding, and I have found atool that is a perfect reminder to fight my instinct to code continuously for hours without interruptions. It is called WorkPause and you can download it at http://www.praven3.com/workpause."

I downloaded and installed the 30 day free trial and I find that I like it. It's very customizable. So now after 30 minutes of work, my screen locks and a 15 second countdown starts. I can't do anything with my laptop. My immediate reaction is anger.

"Hey! Why can't I type? What's going on?"

Then I remember why this has happened and I sit back, take a deep breath, and wait it out. After the 15 seconds, I can unlock it if I want. Or I can take a real break.

Either way, I am forced to pause. Thanks, Danilo. I am going to buy WorkPause. And I urge all the other developers reading this entry to give it a try. It will save you lots of time and make you feel better, too.

Thursday, May 28, 2009

Naming Conventions and Coding Standards, the Feuerstein Way

I am often asked about the naming conventions and coding standards that I use. My answer is usually a combination of muttering and vague statements and hand-waving.

That's because I have a confession: I don't have a single naming conventions and coding standards document that I use. Why not? Because I am a software developer! That is, I feel (well, I am) very busy, overwhelmed by deadlines. I don't feel like I have the time to stop and write down the few rules that I might actually follow more of less consistently. And it seems that a part of me is somewhat resistant to being accountable to a standard. Sound familiar?

Sigh...unfortunately (no, make that very fortunately), lots of other PL/SQL developers look to me for advice about how to "do things right." Ah, the pressure, the pressure!

Ah, the hypocrisy. That's what it really comes down to: I am a big hypocrite. I routinely violate just about every best practice I push on others. I sound high and mighty, but when I write code, I feel the same pull to do the quick and dirty.

So I've decided to take a few moments out of my various plane rides (I am now - when I started this document, anyway - flying from Manchester, UK, to Sweden to do a presentation to the Stockholm OUG, then a couple of days of customer visits in Stockholm and Milan, then two days of training for Oracle in Helsinki) to jot down what have become my de facto coding standards.

You see, I do have standards, and I even follow them, more or less. I just didn't want to take the time to write them down.

So that's what (finally) you'll find here. It's a combination of the naming conventions I follow, certain naming conventions with which I disagree, and a variety of other suggestions. I hope you find it useful. I'm not going to make much of an effort to justify my approach or explain away the inconsistencies. I'll just show you what I do and you can decide for yourself if you'd like to use my path as a model for your own journey.

I also hereby declare this to be a work in progress. So...

1. If you have disagreements with my approach, let me know. Perhaps I will agree with you, and change my document (you will get the credit).

2. If you have a suggestion for something to add to the document, send it to me. If I like it, I will put it into the document (and give you credit).

3. If you would like to offer your own set of naming conventions and coding standards to the world of PL/SQL developers, I will add it to the webpage (after you send it to me).

The URL for my standards document is:

www.ToadWorld.com/SF/standards

Thursday, May 21, 2009

Why can't Dick Cheney just sink back into his "undisclosed location"?

How strange. When Dick Cheney was the Vice President and, many argue, the main force behind the Bush Administration's policies, he was largely invisible, holed up in an "undisclosed location" and acting is an un-democractic a fashion as seemed possible.

Then his party loses the election, in large part precisely because his policies had wrecked more than one country in the last eight years, including ours.

You'd think he'd show a little humility in the face of this rejection, but no.

Instead, he seems to have taken it upon himself to hit the airwaves and share his grim, foreboding, scolding, destructive perspectives on the Obama Administration with the world.

Please, Dick, stop being a dick. Just shut up and go back to reaping the many financial rewards of steering billions in government contracts to companies in which you have a stake or some really good friends. Surely that should be enough for the closest thing to a Darth Vadur we have in this country today.

New blog on Quest Code Tester

As you may know, besides writing about and playing with PL/SQL, I have helped create an automated testing tool for PL/SQL code name Quest Code Tester for Oracle. If you have any intention of methodically and repeatedly testing the code you write, Code Tester is without doubt the best option you have for doing this, since it generates almost all of your test code. Click here for more information on the product.

The point of this entry, however, is to make sure you are aware of a new blog at ToadWorld.com focusing specifically on the topic of automated testing of Oracle code named "Real Automated Code Testing for Oracle." Here's the URL:

http://toadworld.com/Community/Blogs/tabid/67/BlogID/32/Default.aspx

I co-author this blog with Finn Ellebaek Nielsen, a Danish consultant who has been working with Oracle technology for a long time and is one of the most knowledgeable and advanced users of Code Tester I have run across to date.

You will find at this blog my introductory entry announcing the blog, plus Finn's first contribution. I hope you like it. Please leave a comment!

Regards, Steven

Saturday, May 02, 2009

Advice for dealing with ridiculous interview questions

I received an email last week with this question: "What is the maximum number of triggers that can be defined on a single table?"

My answer was: "Heck if I know. Check the Oracle documentation."

To which he replied: "Actually Oracle documentation does not mention anything about this. But this a favorite question asked during interviews for PL/SQL jobs in India."

A favorite interview question? How absurd! When I interview a person for a job as a PL/SQL developer (which I admit I have not done all that often). I am much more interested in:

Problem solving skills (MOST IMPORTANT): Can you think logically? If you are not well versed in symbolic logic (whether or not you know it as such), then it will be very difficult to solve your programming puzzles, debug your code, and understand other people's code.

Language familiarity (SECOND MOST IMPORTANT): Do you know about and have experience with critical, non-beginner features of the PL/SQL language, such as collections, FORALL, BULK COLLECT, AUTHID, autonomous transactions, etc.?

Awareness of limitations like the maximum number of triggers doesn't play any role in writing high quality code. In fact, one might argue that a brain filled with such arbitrary and irrelevant data is less likely to have a solid grasp of fundamentals and principles.

But if you really want to know the answer, the best way to check/prove the limit on the number of triggers you can define on a table is to test it with code (documentation can always be wrong, but the code is...the code...the "reality" within this particular chunk of cyberspace). Here's a script you can use to do just that:

SET SERVEROUTPUT ON

CREATE TABLE limits_table (n NUMBER)
/

DECLARE
n PLS_INTEGER := 1;
BEGIN
LOOP
EXECUTE IMMEDIATE 'create or replace trigger limits_table'
|| n ||
' before insert on limits_table for each row begin null; end;';
DBMS_OUTPUT.put_line ('Created ' || n || ' triggers!');
n := n + 1;
END LOOP;
END;
/

SELECT COUNT ( * )
FROM user_triggers
WHERE trigger_name LIKE 'LIMITS_TABLE%'
/

BEGIN
FOR rec IN (SELECT *
FROM user_triggers
WHERE trigger_name LIKE 'LIMITS_TABLE%')
LOOP
EXECUTE IMMEDIATE 'drop trigger ' || rec.trigger_name;
END LOOP;
END;
/

The result on Oracle Database 11g Release 1 was interesting: I ran this script while flying from Chicago down to Florida for Collaborate09. I started this script and many minutes later, I had to turn off the laptop since we were landing. By that time, over 5000 triggers had been created on the same table. Maybe I will run this later and let it run overnight, but really what's the point? No one is ever going to create that many triggers on a single table. Perhaps there is a lower, hard limit like 12 on Oracle Database 10g or earlier versions. Why don't you run this script on your database and let me know what you get?

To conclude, I suggest that if your interviewer asks you silly questions like this one, you should answer as follows:

"Why do you think it matters if I know this information? How will it help me be more successful on your team? And how do you know you've even got the right answer? Let's build a script to prove that the answer is right!"

Then whip out your laptop, throw together a script and show what a good problem solver you are. I guarantee you will have a much better shot at your job with this kind of answer.

Thursday, April 30, 2009

iPorn - are 100000000 "apps" really what we need now?

A friend of mine recently wrote to me:

"I just spent 2 hours on the phone with Apple to get Outlook to sync calendars with my iPhone (still not done but I hope successful); now that will get you confused and wondering about your sanity for wanting that sexy phone..."

I wrote this response to her (then sensibly chose not to send it - no need to be rude!):

Ooooooh, an IPorn....:-) Sorry, silly "typo" - it does seem to me, though, that Apple products are essentially techporn. So sexy and cool - feeding our narcissism and absorption with superficial applications of technology. And the sleek, minimalist, modernist lines? I am sick of them. Give me some "good, old-fashioned" ornamentation.

I am not really a Luddite, but I have become decidely (or, at least, relatively) low-tech in my view on life. I have a cell phone, but it is just a phone - no camera, no MP3 player. I don't want a PDA, I don't want to stick things into my ears, I don't want to wall myself off from the world around me, escaping into a private space of infinite playlists, twits, and life-as-iPhone-app.

"Wow, I can blow into an iPhone and make it sound like a flute."

That is incredible, don't get me wrong. But really who cares? Or to put it a better way: is this really what we should be caring about these days?

Capitalism is Dead, Long Live the iPhone!

Wednesday, April 22, 2009

An interview with yours truly

In case you simply can't get enough of Steven Feuerstein (no, I don't generally talk about myself in the third person and definitely never in the royal "we"), I invite you to check out this interview. I had an awful lot of fun answering the questions, and you might be entertained reading them.

Monday, April 20, 2009

Need to parse a delimited string? Use this package!

For several years now, anyone who was interested could download my "demo.zip" file, which consists of some 2000 files that I use in my trainings. This zip contains demonstration scripts, but also some generic utilities, like the parse package, which parsed a delimited string and returned a collection of the individual elements.

I recently enhanced the package to allow me to easily parse lists of lists, and even named lists of lists. Rather than just "bury it" inside the demo.zip, I thought I would tell you about it on my blog and give you a direct link to the code.

My objective is to reduce the possibility that any other PL/SQL developers will ever need or want to take the time to build their own parsing utility. Oracle PL/SQL should, of course, provide such a program for us. Sadly, it does not. Or, rather, it offers DBMS_UTILITY.COMMA_TO_TABLE, which is so eccentric and limited in its functionality that I find it embarrassing.

So....the parse package offers three different overloadings of the string_to_list function:

PACKAGE parse
IS
SUBTYPE maxvarchar2_t IS VARCHAR2 (32767);
TYPE items_tt IS TABLE OF maxvarchar2_t INDEX BY PLS_INTEGER;
TYPE nested_items_tt IS TABLE OF items_tt INDEX BY PLS_INTEGER;
TYPE named_nested_items_tt IS TABLE OF items_tt INDEX BY maxvarchar2_t;

FUNCTION string_to_list (string_in IN VARCHAR2, delim_in IN VARCHAR2)
RETURN items_tt;

FUNCTION string_to_list (string_in IN VARCHAR2
, outer_delim_in IN VARCHAR2
, inner_delim_in IN VARCHAR2
)
RETURN nested_items_tt;

FUNCTION string_to_list (string_in IN VARCHAR2
, outer_delim_in IN VARCHAR2
, name_delim_in IN VARCHAR2
, inner_delim_in IN VARCHAR2
)
RETURN named_nested_items_tt;
END parse;


Here are examples of using each one:

DECLARE
l_list parse.items_tt;
BEGIN
l_list := parse.string_to_list ('a,b,c,d', ',');
END;

DECLARE
l_list parse.nested_items_tt;
BEGIN
l_list := parse.string_to_list ('a,b,c,d|1,2,3,4', '|', ',');
END;

DECLARE
l_list parse.named_nested_items_tt;
BEGIN
l_list := parse.string_to_list ('letters:a,b,c,d|numbers:1,2,3,4', '|', ':', ',');
END;


The package also contains helper programs to display the contents of lists and compare collection records for equality. This latter function is utilized by Quest Code Tester to automatically test the package. The zip file contains a Code Tester export file (.qut) that you can import into Code Tester 1.8.3 or higher and verify the behavior of these programs. Currently, 1.8.3 is in beta and you can download it here.

I hope you find them useful! If, of course, you find a bug, please let me know so I can fix it. Even better, add the test case that reproduces the bug to the Code Tester test definition, then fix it yourself and send me all of the modified files.

That would be a really friendly thing to do. :-)

Sunday, April 19, 2009

What a strange life I lead

I am flying back to Chicago after a week in Europe (more or less). Monday and Tuesday in Istanbul, teaching a two-day course for Oracle. Zurich on Wednesday, Munich on Thursday, Frankfurt on Friday - presenting "Guaranteeing Application Success with the Toad Development Suite" for Quest Software, my employer.

So I am in seat 31B of an American Airlines 777. That means it is an exit row coach seat with a big open space in front of me. Even better, 31A is empty, so I have "spread out", my laptop is plugged into the power outlet, and I am very pleased with myself.

What? Pleased? Having to sit in an enormous metal cylinder hurtling through the air at 542 miles per hour?

Yes. I just realized that I am actually enjoying myself, because I am getting a lot of work done. Specifically, I am editing chapters for the fifth edition of Oracle PL/SQL Programming (available in September 2009, covering all features of Oracle PL/SQL through Oracle Database 11g Release 2). Earlier, I fixed several bugs in Quest Code Tester, revamped my Best of PL/SQL course materials in advance of my two day training on this topic in Salt Lake City next week.

On an eight hour flight back to Chicago, I probably manage to get about 5-6 hours of work accomplished. I am actually more productive on the plane than I am in my own home office. Why? Fewer distractions - most notably, I cannot check my email. So I can't respond to my emails. I can't go online and play my games of chess (at GameKnot.com, a really wonderful site if you happen to enjoy chess).

Given how much I travel on American Airlines (over 230,000 miles in the last two years), I can get upgrades pretty much whenever I want. But I also realized recently that as long as I can get one of these row 31 aisle seats (31B or 31H), I'd rather not upgrade. If I do, I am fed more often, it takes longer to eat, and I am more tempted to drink alcohol. I get less done and in no more comfortable an environment.

This is what my life has come to.

Well, I suppose it could be worse. :-)

Friday, March 27, 2009

A chat with some of my favorite people: the makers of PL/SQL

On Tuesday this past week (March 24), I had the honor of spending some time at Oracle headquarters with two guys from the PL/SQL Team -- Charles Wetherell, the brains behind the optimizing compiler, and my long-time sparring partner Bryn Llewellyn, the public face of the team. I make the pilgrimage to HQ every year or so to share PL/SQL stories, meeting different team members each time.

I talk about what I am doing with PL/SQL and what I see out there in the big world of PL/SQL developers. They talk about what they are doing with the language, and where they see it going. They usually even pretend to give consideration to my viewpoints! Aw, just joking. They are most respectful.

Now that Oracle Database 11g Release 2 is well into its Beta Program, most of the developers at Oracle HQ are hard at work on the end-game activities -- while some are already starting to plan the content of the next major release. It was great to have the chance to talk, strictly off the record, with Charles and Bryn about their ideas for the next big steps in PL/SQL, and to put forward some of mine.

And while I cannot go into any details, I can tell you that it is very clear that Oracle remains committed to supporting and enhancing the PL/SQL language in very substantial and, in at least one case, for me, quite surprising, ways.

I can also report that the team generally pays attention to input from their users (PL/SQL developers). Not only that, but the ideas proposed and voted on at ILovePLSQLAnd.net are treated with the utmost consideration. So please, please, please....if you have not yet visited this website, please do immediately and vote on the PL/SQL enhancements you feel would benefit you the most. When Oracle Database 11g Release 2 becomes generally available, I will update the list on ILovePLSQLAnd.net to show what has been implemented.

And, as always after a meeting with my friends on the PL/SQL team, I am reminded of two things:

1. How glad I am that we have people of their caliber (real computer scientists) planning out and implementing changes to PL/SQL - and not people of my caliber (that is, largely self-trained and quite amateurish by comparison).

2. That for many years to come, PL/SQL will continue to be a truly fine language in which to write software and implement business requirements.

So, happy coding, my fellow PL/SQL developers! Rest assured; our future selves will be more productive and ever more pleased with the language with which we spend so much of our time.

Thursday, March 05, 2009

Random reactions to Consumer Reports' Auto Issue

The mouths of real men don't water when they hear that the Sports Illustrated swimsuit issue is going to hit the newstands. That's adolescent stuff.

No, real men get all excited when they hear that Consumer Reports is about to publish its latest Auto Issue.

Consumers Union (publisher of Consumer Reports, consumerreports.org and many other invaluable resources) is an amazing organization. They exist for one reason only: to provide unbiased information to consumers to help them buy the highest quality, safest, most reliable product that best fits our needs. CU accepts no money from corporations, and certainly nothing from the companies that create the products CU evaluates. CU has no axe to grind, no reason to do anything but totally objectively test and analyze stuff, to help consumers get the best deal (not necessarily the lowest price).

Companies are even barred from using CU results in their own advertisements (usages like "Look, CU says our car is the best!" are quickly challenged in court - and won).

The Auto Issue offers detailed evaluations of hundreds of cars, both new and used. It is a must-read for anyone planning to buy a vehicle (not that there's much of that going on these days). I definitely do not plan to buy a new car. I hope to never again have to buy another car again, in my lifetime. At least not one that uses gasoline. But it is still fun to read.

Here are some things that caught my eye:
  • First the cover: at first glance, it looks like many other magazine covers. Lots of bright colors, very nicely laid out, etc. But there is something really different about it: right on the cover, next to the titles of articles and sections in the magazine, are the page numbers on which those articles appear! Page numbers? Radical! Usually, magazines hide page numbers so you have to leaf through the magazine to find the article of interest, coming across ads in the process. Since Consumer Reports has no ads, there is no reason to do that.
  • On page 15, CR offers "Automaker report cards", overall scores of brands (Honda, GM, Hyundai, etc.), rather than particular models. Honda is #1 with a score of 78. 95% of the vehicles tested are recommended by CR. Incredible. Second is Subaru, with a slightly lower score but 100% recommendations (disclosure: we are a Subaru family; my wife loves the all-wheel drive). Toyota is third. Out of the 45 brands shown on the page, four of the last (lowest scores) five brands are Ford, GM and Chrysler, in that order. And, horribly, CR could not recommend even a single Chrysler model. That is just downright embarrassing.
  • Oddly, the cover shows a Honda Fit as the "top value" for 2009, but in its "Top Picks" section, the Fit does not appear. CR must have some very interesting algorithms for making its choices.
So the bottom line is that if you are thinking of purchasing a car, you would be downright nuts to not consult the Auto Issue first.

Best thing to do is subscribe online: just $26 a year gives you full online, searchable access to all of CR's information. You will recoup that small investment many times over, both in terms of money and value for you and your family.

One final comment: I believe that CU has the potential to radically transform the distribution of power in our capitalist society. Today, corporations push products at us, convincing us to buy their stuff mostly through manipulation (ads), coercion (high pressure sales) and ignorance (most Americans are poorly educated, non-critical thinkers). With CU, you can ignore the ads and focus solely on the data; at a minimum, you can use CU to avoid purchasing unsafe, nasty, poorly-designed products.

I strongly urge you to join CU today, and help make it more effective, able to test more products and take more action to protect consumers. It will be the best investment you make in 2009. I guarantee it.

Thursday, February 26, 2009

Hard to blog through sadness....

It's been a long time since my last blog. A big part of my noted absence (ha!) from the blogosphere is that we are busily freezing code for release 1.8.3 of Quest Code Tester, plus I am building a thorough automated regression test for this tool. Wow, that takes a lot of time, even when I use Code Tester to help me test....Code Tester.

I wish, though, that that's all it was.

Instead, I have had a hard time returning to my blog because on February 2, a 23-year old friend of my son, who we have known since he was six, committed suicide by jumping from the top of his apartment building.

His suicide hit me hard, not only because I knew Jeff when he was little (we hadn't actually seen him for more than a few passing words and minutes for the last several years) and because his father was a good friend of ours. But also because it has been hard for my mind to not stray into thinking what it would have been like if Eli (same age, many similar general life circumstances)....

And then my mind shuts down in pain and horror, and I move away from those thoughts, leaving just emptiness, sadness, and little motivation to gush about the bright corners of the world.