Comments on: Found or Not Found, That is The Question. Do You Have The Answer? http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/ News, views, tips and tricks on Oracle and other fun stuff Wed, 09 Jul 2008 00:44:04 +0000 http://wordpress.org/?v=2.5 By: Eddie Awad http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51554 Eddie Awad Mon, 17 Sep 2007 01:54:47 +0000 http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51554 <p>@Gary: You get a round of applause for your excellent thinking :).</p> <p>Regarding number 7, <code>select count(*) into v from dual where 1 = 2</code> will not result in a NO_DATA_FOUND exception, but, if you add to it <code>having 1 = 2</code> or <code>group by 1</code> for example you'll end up with NO_DATA_FOUND.</p> <p>Regarding 8, the fact that the function raises a NO_DATA_FOUND exception will <em>not</em> result in a NO_DATA_FOUND exception in the client that is calling the function.</p> <p>@Patrick: You also get a round of applause for your correct answer.</p> <p>clap clap clap clap clap clap clap clap clap clap</p> @Gary: You get a round of applause for your excellent thinking :).

Regarding number 7, select count(*) into v from dual where 1 = 2 will not result in a NO_DATA_FOUND exception, but, if you add to it having 1 = 2 or group by 1 for example you’ll end up with NO_DATA_FOUND.

Regarding 8, the fact that the function raises a NO_DATA_FOUND exception will not result in a NO_DATA_FOUND exception in the client that is calling the function.

@Patrick: You also get a round of applause for your correct answer.

clap clap clap clap clap clap clap clap clap clap

]]> By: Patrick Wolf http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51551 Patrick Wolf Sun, 16 Sep 2007 06:37:52 +0000 http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51551 <p>2 (raises a VALUE_ERROR), 6, 7, 8</p> <p>:-) Patrick</p> 2 (raises a VALUE_ERROR), 6, 7, 8

:-) Patrick

]]> By: Gary http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51549 Gary Sat, 15 Sep 2007 20:56:40 +0000 http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51549 <p>7 is ambiguous Do you mean the WHERE criteria match no rows (in which case you get a count() of zero) or that you have a HAVING clause such that the select returns no rows [eg select count() from table where 1=2 having count(*) != 0] 8 depends on whether the SELECT is a SELECT INTO, SELECT BULK COLLECT INTO, Cursor for loop. I'd go with 2 and 6</p> 7 is ambiguous
Do you mean the WHERE criteria match no rows (in which case you get a count() of zero) or that you have a HAVING clause such that the select returns no rows [eg select count() from table where 1=2 having count(*) != 0]
8 depends on whether the SELECT is a SELECT INTO, SELECT BULK COLLECT INTO, Cursor for loop.
I’d go with 2 and 6

]]> By: Eddie Awad http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51545 Eddie Awad Fri, 14 Sep 2007 22:22:26 +0000 http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51545 <p>Delfino, thanks for your response, however, your answer is not complete. The answer should list <em>all</em> the circumstances that do not raise a NO_DATA_FOUND exception, not just one. I'll update the post to make the question clearer.</p> Delfino, thanks for your response, however, your answer is not complete. The answer should list all the circumstances that do not raise a NO_DATA_FOUND exception, not just one. I’ll update the post to make the question clearer.

]]> By: Delfino http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51544 Delfino Fri, 14 Sep 2007 20:09:28 +0000 http://awads.net/wp/2007/09/14/found-or-not-found-that-is-the-question-do-you-have-the-answer/#comment-51544 <p>2</p> 2

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