Re: pattern search

From: <Jared.Still_at_radisys.com>
Date: Fri, 07 Nov 2003 10:54:26 -0800
Message-ID: <F001.005D5FD5.20031107105426@fatcity.com>

Here are a number of examples using the OWA_PATTERN package:

declare

        tstr varchar2(100) := 'this contains tabs               multiple 
spaces      and single spaces';
begin
        dbms_output.put_line( tstr);
        owa_pattern.change( tstr, '\s', '', 'g');
        dbms_output.put_line( tstr);

end;
/

declare

        tstr varchar2(100) := 'this c34ontains s0239everal 2340 numeric 882 dig2its';
begin

        dbms_output.put_line( tstr);
        -- remove the digits
        owa_pattern.change( tstr, '\d', '', 'g');
        dbms_output.put_line( tstr);
        -- remove the extra spaces
        owa_pattern.change( tstr, '\s+', ' ', 'g');
        dbms_output.put_line( tstr);

end;
/

drop table owatest;

create table owatest (

        test varchar2(20)
)
/

insert into owatest values('non numeric row'); insert into owatest values('numeric 23423 row');

commit;

select *
from owatest
where owa_pattern.amatch(test,1,'^.*\d') > 0
/

drop table regex;

create table regex (

        test varchar2(20)
);

create or replace function strip_str (

        data_in varchar2
        --, regex_in varchar2

)
return varchar2
is

        test_str varchar2(4000);
begin

        test_str := data_in;
        --owa_pattern.change(test_str, regex_in, '', 'g');
        owa_pattern.change(test_str, '\x0a', '', 'g');
        owa_pattern.change(test_str, '\x0c', '', 'g');
        owa_pattern.change(test_str, '\x0d', '', 'g');
        return test_str;

end;
/

show error function strip_str

insert into regex values( 'carriage' || chr(13) || 'return');
insert into regex values( 'line' || chr(10) || 'feeds' || chr(10));
insert into regex values( 'form feed' || chr(12));

commit;

select test
from regex;

select strip_str(test) test
from regex
/

"Shiva Maran" <Shivam_at_talisma.com>
Sent by: ml-errors_at_fatcity.com
 11/06/2003 11:19 PM
 Please respond to ORACLE-L  

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
        cc: 
        Subject:        pattern search

Hi All,

  I need a means to search for a pattern (With basic wildcard characters like %, _, ^, []). How do I do this in oracle. I also need to get back the string that matches the pattern. Is there any predefined function or procedure that does this. Would like to avoid implementing this on my own.

TIA,
ShivaM

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Please see the official ORACLE-L FAQ: http://www.orafaq.net
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Author: 
  INET: Jared.Still_at_radisys.com

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Received on Fri Nov 07 2003 - 12:54:26 CST