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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Isnumeric question
Regex is only part of the Perl story.
If you must do many complex string manipulations, Oracle cannot compete with Perl.
Jared
"Mercadante, Thomas F" <NDATFM_at_labor.state.ny.us>
Sent by: ml-errors_at_fatcity.com
09/23/2003 01:44 PM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
cc:
Subject: RE: Isnumeric question
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-----
Sent: Tuesday, September 23, 2003 4:25 PM
To: Multiple recipients of list ORACLE-L
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----- Sent: Tuesday, September 23, 2003 1:40 PM To: Multiple recipients of list ORACLE-L Or, how about: http://www.oreilly.com/catalog/oracleregexpr/ Mladen Gogala <mgogala_at_adelphia.net> Sent by: ml-errors_at_fatcity.com 09/22/2003 06:44 PM Please respond to ORACLE-L To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> 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:Received on Tue Sep 23 2003 - 17:04:41 CDT
> >-----Original Message-----
> >From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com]On 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: Jacques.Kilchoer_at_quest.com
>
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> San Diego, California -- Mailing list and web hosting services
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> -- Mladen Gogala Oracle DBA -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mladen Gogala INET: mgogala_at_adelphia.net Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Wang Trading LLC and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be the views of any such entity. -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: INET: Jared.Still_at_radisys.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
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