RE: Isnumeric question

[Mercadante, Thomas F]

Title: Message

Mladen,

 

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 question

Let'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 full

strength of the regular expressions to 8.1.7. Visit the following URL: http://www.smashing.org/extproc_perl and you'll get the

idea 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]
>
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--
Mladen Gogala
Oracle DBA
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Mladen Gogala
 INET: [EMAIL PROTECTED]

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