Eddie Awad’s Blog - Latest Comments in What you Ought to Know About CASE in Oracle PL/SQL

Re: What you Ought to Know About CASE in Oracle PL/SQL

Not Tom — Wed, 08 Oct 2008 10:53:33 -0000

Surprise surprise, Tom wrote a snarky response without reading the post.

This article and the poster on asktom are talking about CASE in Oracle PL/SQL. Tom is only talking about CASE in Oracle SQL, where you never need the ELSE.

Bottom line is, you'll only get the CASE_NOT_FOUND exception when omitting the else clause from a case "statement" in PL/SQL.

Re: What you Ought to Know About CASE in Oracle PL/SQL

Reader — Sat, 04 Aug 2007 21:20:23 -0000

Seems like an unknown subtlety to even Tom:

http://asktom.oracle.com/pl...

Re: What you Ought to Know About CASE in Oracle PL/SQL

Eddie Awad — Thu, 26 Jul 2007 23:21:29 -0000

Glad you learned something new guys. I also learned something new today thanks to Pete, the Duff's device. I had to check it out. Very interesting.

After my limited reading about it, and If I understand it correctly, I do not believe that Duff's device can be simulated in PL/SQL using CASE because there is no "break" in PL/SQL as there is in C. Moreover, unlike C, CASE breaks automatically at the end of a positive WHEN condition block (continues after the END CASE).

Now, there is this new feature in 11g, CONTINUE, but I do not see that it will make any difference in this case.

Re: What you Ought to Know About CASE in Oracle PL/SQL

Sidhu — Thu, 26 Jul 2007 13:05:50 -0000

Good one Eddie

Learned a new thing :)

Sidhu

Re: What you Ought to Know About CASE in Oracle PL/SQL

Pete Finnigan — Thu, 26 Jul 2007 10:09:08 -0000

Nice post Eddie, it would be interesting; if i had any spare time..:-) to see if Duffs device would work with PL/SQL case contructs as they do with C.

cheers

Pete

Re: What you Ought to Know About CASE in Oracle PL/SQL

Karl — Thu, 26 Jul 2007 02:43:47 -0000

oh!
this was new to me the differnet behavior of a searched case expression and a statement.
Great
Karl