Perl
regular expressions are very powerful and combined with the rest of perl, you
get a unique tool for rapid programming.
I'm
learning perl/tk these days and I must say, it's extremely efficient and
quick way to do stuff. Perl is interpreted, you get
a good
development environment which warns you about the syntax for free (no, not the
stuff from Jared's book, I'm talking
about
the Eclipse, which I find extremely practical), perl is portable, you can run
perl even without a database, and you can
do
things quickly. The only problem with perl is that the language itself is huge.
Add modules like DBI, Tk, File::Basename,
perlpod and alike and you have a lot to learn.
I plan
on learning Python before Thanksgiving and II'll give you a comparison if
you are still interested at that time.
Regular expressions are nice and if you want a pure oracle solution,
then, PL/SQL is the way to go. There are things
that
are simply not duable with PL/SQL, like the communication with the operating
system. You cannot
say
anything like this in PL/SQL
open(LP,"|lp -d HP_4200")||die
"Cannot open LP: $!\n";
The
reason why I started using perl are formats. Perl has a decent report writer and
you can get much cleaner and prettier
reports with perl then with sqlplus. You probably remember rpt/rpf. I
really miss a procedural report writing tool like that.
Perl
simply filled the void.
--
Mladen Gogala
Oracle DBA
Mladen Gogala
Oracle DBA
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mercadante, Thomas F
Sent: Tuesday, September 23, 2003 4:45 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: Isnumeric questionMladen,While I respect you and your ability with using Perl, if this capability with regular expressions now exists directly within PL/SQL, then why would I want to use Perl to do this?Oracle Magazine had a pretty good article describing the newly-renamed Oracle Expressions (don't you *love it* when Oracle renames something and then pushes it in the press like it's brand-freekin-new - like Grid Computing).Looks pretty powerful, though I don't have a need for it yet.Tom Mercadante
Oracle Certified Professional-----Original Message-----
From: Mladen Gogala [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 23, 2003 4:25 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: Isnumeric questionLet's see:Oracle Regular Expressions Pocket Reference is part tutorial and part quick-reference. It's suitable for those who have never used regular expressions before, as well as those who have experience with Perl and other languages supporting regular expressions. The book describes Oracle Database 10G's support for regular expressions, including globalization support and differences between Perl's syntax and the POSIX syntax supported by Oracle 10G. It also provides a comprehensive reference, including examples, to all supported regular _expression_ operators, functions, and error messages.This book like it's written for the same version as the article I pulled from OTN. I think I can top that and add the fullstrength of the regular expressions to 8.1.7. Visit the following URL: http://www.smashing.org/extproc_perl and you'll get theidea how it's done.--
Mladen Gogala
Oracle DBA-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Tuesday, September 23, 2003 1:40 PM
To: Multiple recipients of list ORACLE-L
Subject: Re: Isnumeric question
Or, how about: http://www.oreilly.com/catalog/oracleregexpr/
Mladen Gogala <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]09/22/2003 06:44 PM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Re: Isnumeric question
Here is a good impossible solution which can be used
to make this list drool:
http://technet.oracle.com/oramag/webcolumns/2003/techarticles/rischert_regexp_pt1.html
On 2003.09.22 21:24, Jacques Kilchoer wrote:
> >-----Original Message-----
> >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of
> Teresita Castro
> >
> >I want to made something like this ina query
> >
> >select decode( isnumeric(line_comment), to_number(line_comment),0)
> >
> >how can I do this in Oracle?
>
> First you need to define what "isnumeric" means to you.
> Does it mean
> a) this string only contains ASCII characters 0 through 9
> b) this string only contains ASCII characters 0 through 9 with maybe one
> decimal point (as determined by my NLS settings)'
> c) this string only contains ASCII characters 0 through 9 with maybe one
> decimal point and group separators (as determined by my NLS settings)
> d) 'this string contains a valid ORACLE number constant' e.g. -2.3e+10 is a
> valid number?
> e) something else (minus signs, etc.)
>
> If the answer is d), then (from an old idea by Jared Still) create your own
> function
> create function is_number (str in varchar2)
> return number
> is
> x number ;
> begin
> x := to_number (str) ;
> return 1 ;
> exception
> when value_error
> then
> return 0 ;
> when others
> then
> raise ;
> end ;
> /
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Jacques Kilchoer
> INET: [EMAIL PROTECTED]
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
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--
Mladen Gogala
Oracle DBA
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Mladen Gogala
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