Regular Expression for replacing Leading Spaces

I don't claim to be any expert on Regular Expressions and even after reading CD's introduction to Reg Exp, I still can't figure out this one which I'm sure must be very basic.
I want to replace all the leading spaces in a string with "." chrs. I could do this using the common replace/substr/instr functions, but I reckoned it would be possible in a single regular regexp_replace call.
So far I've got this...
SQL> select regexp_replace('      FRED BLOGS    WAS HERE    ', '^([:space:])*', '.')
2 as result
3 from dual;
RESULT
.      FRED BLOGS    WAS HERE
SQL>Which is replacing the start of line with a "." and not the spaces.
But I want my result to be:-
RESULT
......FRED BLOGS    WAS HERE
SQL>Cheers

That was very good solution .
Can you explain me the significance of "| " in the code, other things I could trace out.
I try to run the code with the 2 cases
when I give a space after | symbol it prints the * many times
SQL> SELECT col1, REGEXP_REPLACE(col1, ' ([^ ]+.*)|','*\1')
2 FROM (SELECT ' FRED BLOGS WAS HERE ' col1 FROM dual );
COL1
REGEXP_REPLACE(COL1,'([^]+.*)|','*\1')
FRED BLOGS WAS HERE
*FRED BLOGS WAS HERE
SQL> SELECT col1, REGEXP_REPLACE(col1, ' ([^ ]+.*)| ','*\1')
2 FROM (SELECT ' FRED BLOGS WAS HERE ' col1 FROM dual );
COL1
REGEXP_REPLACE(COL1,'([^]+.*)|','*\1')
FRED BLOGS WAS HERE
******FRED BLOGS WAS HERE

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Sander D
Thanks

possibility of some other ways too...
with rt as
(select 'Von K. Wright' str from dual union all
select 'Kalvin J. Rowling' from dual union all
select 'Debby J. Sanders' from dual)
select str,regexp_replace(str, '(.*) (.*) (.*)', '\3 \1') str from rt;
Row#     STR     STR_1
1     Von K. Wright     Wright Von
2     Kalvin J. Rowling     Rowling Kalvin
3     Debby J. Sanders     Sanders Debby
with rt as
(select 'Von K. Wright' str from dual union all
select 'Kalvin J. Rowling' from dual union all
select 'Debby J. Sanders' from dual)
select str,regexp_replace(str, '(.*) (.*) (.*)', '\3 ') || substr(regexp_replace(str, '(.*) (.*) (.*)', '\1'),1,1) str from rt;
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1     Von K. Wright     Wright V
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Hii
I have a data like this
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Terengganu
Luala Terengganu
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Luala Terengganu
Thanks In Advance
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http://kamranagayev.wordpress.com

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duplicate of Grouping & Back-references with regular expressions on Replace Text window

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BANNER
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Or use DML error logging:
create table t1
(col1 number);
exec dbms_errlog.create_error_log ('t1','t1_errors')
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   select '1e' col from dual
select col
from t
log errors into t1_errors
reject limit 20
col col1 for 999,999,999.99
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           1.00
           1.10
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            .11
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   1,000,000.00
col col1 for a30
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           1722 ORA-01722: invalid number                           I                       1,1
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Regular expression for BBcode list to html list

Hi,
we are migrating BBforum to Jive forum.
BBforums has data which contains BBcode Strings.i found the follwoing code after googled.
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String html = text;
Map<String, String> bbMap = new HashMap<String, String>();
bbMap.put("(\r\n|\r|\n|\n\r)", "<br/>");
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html =
html.replaceAll(entry.getKey().toString(), entry.getValue().toString());
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i have BBcode with format like
[list] [*]blue[*]red[*] green[list]
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Edited by: 875452 on Jul 31, 2011 8:03 AM

Moderator advice: Please read the announcement(s) at the top of the forum listings and the FAQ linked from every page. They are there for a purpose.
Then edit your post and format the code correctly.
Moderator action: Moved from Development Tools » General Questions
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What is the regular expression for the end of a story?

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You know you can use a keyboard shortcut to move your cursor to the end of any story, right? Ctrl + End on Windows, Cmd + End, I think, on Mac. Unless you want to do this to every single story in the document, I would think you might be just as well off to put your text on the clipboard, put the cursor in the story and hit the key combo followed by Ctrl/Cmd + V to paste.

Regular Expression For Dreamweaver

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{Click here to visit my website}{http://www.adobe.com/}
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{http://www.adobe.com/}{Click here to visit my website}
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So you have a string that starts { and goes until the first }. Then you have another string exactly the same. And you want to swap them. I'm not making any assumption that the second one has to look like a URL (that's a whole other minefield, but perhaps you could do something simple like it must start with http).
You don't specify how your text file is divided up, have you got this as a complete line to itself, or is it just a huge block of text? Preferably as individual lines.
I don't have Dreamweaver, but this worked for me in Notepad++
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{Click here to visit my website}{http://www.adobe.com/}
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{http://www.example.com/foo}{some other site}

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./myfile.txt
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/home/my-home/myFile.foo
etc.
Now, in a perfect world, it could also do Windows (or ANY OS for that matter) pathnames (though this is not terrbibly important for my case at least).
TIA,
/m

import java.util.regex.*;
* @author Ian Schneider
public class FileRegex {
    static Pattern pattern;
    /** Creates a new instance of FileRegex */
    public FileRegex() {
    public Pattern getPattern() {
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        return getPattern().matcher(path).matches();
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        String[] files = {
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            "/a/b/c/myfile.txt",
            "/a/../myfile.txt",
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I need a regular expression for recognizing all the tables bane in a geberic statement.
Unlikely i need a regular expression that manage also inner join .I 'm sorry but this matter is new for me and i cannot find any usefull help in the web.
Regards

If you insist it should be something like:
"SELECT ([A-Z0-9_]+)[.][A-Z0-9_]+(,([A-Z0-9_]+)[.][A-Z0-9_]+)* FROM (([A-Z0-9_]+)[.][A-Z0-9_]+) INNER JOIN (([A-Z0-9_]+)[.][A-Z0-9_]+) ON .+" plus spaces etc... Yes it's for this kind of statements only.
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Hi All,
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        Procedure works fine but it takes around 23 mins for processing 1mm of rows.
        Since this procedure would be used, parallely by different ETL processes, so append hint is not recommended.
        Is there any ways to improve its performance, or any suggestion if my approach is not optimized? Thanks for all help in advance.
CREATE OR REPLACE PROCEDURE SONARDBO.PRC_PROCESS_EXCEPTIONS_LOGS_TT
     P_PROCESS_ID       IN        NUMBER,
     P_FEED_ID          IN        NUMBER,
     P_TABLE_NAME       IN        VARCHAR2,
     P_FEED_RECORD      IN        VARCHAR2,
     P_EXCEPTION_RECORD IN        VARCHAR2
    IS
    PRAGMA AUTONOMOUS_TRANSACTION;
    V_EXCEPTION_LOG_ID     EXCEPTION_LOG.EXCEPTION_LOG_ID%TYPE;
    BEGIN
    V_EXCEPTION_LOG_ID :=EXCEPTION_LOG_SEQ.NEXTVAL;
         INSERT INTO SONARDBO.EXCEPTION_LOG
             EXCEPTION_LOG_ID, PROCESS_DATE, PROCESS_ID,EXCEPTION_CODE,FEED_ID,SP_NAME
            ,ATTRIBUTE_NAME,TABLE_NAME,EXCEPTION_RECORD
            ,DATA_STRUCTURE
            ,CREATED_BY,CREATED_TS
         VALUES
         (   V_EXCEPTION_LOG_ID
            ,TRUNC(SYSDATE)
            ,P_PROCESS_ID
            ,'N/A'
            ,P_FEED_ID
            ,NULL
            ,NULL
            ,P_TABLE_NAME
            ,P_FEED_RECORD
            ,NULL
            ,USER
            ,SYSDATE
        INSERT INTO EXCEPTION_ATTR_LOG
            EXCEPTION_ATTR_ID,EXCEPTION_LOG_ID,EXCEPTION_CODE,ATTRIBUTE_NAME,SP_NAME,TABLE_NAME,CREATED_BY,CREATED_TS,ATTRIBUTE_VALUE
        SELECT
            EXCEPTION_ATTR_LOG_SEQ.NEXTVAL          EXCEPTION_ATTR_ID
            ,V_EXCEPTION_LOG_ID                     EXCEPTION_LOG_ID
            ,REGEXP_SUBSTR(str,'[^|]*',1,1)         EXCEPTION_CODE
            ,REGEXP_SUBSTR(str,'[^|]+',1,2)         ATTRIBUTE_NAME
            ,'N/A'                                  SP_NAME
            ,p_table_name
            ,USER
            ,SYSDATE
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        FROM
            DUAL t1 CROSS JOIN
                    TABLE
                        CAST
                            MULTISET
                                SELECT LEVEL
                                FROM DUAL
                                CONNECT BY LEVEL <= REGEXP_COUNT(P_EXCEPTION_RECORD, '([^^])+')
                            AS SYS.odciNumberList
                    ) t2
        WHERE REGEXP_SUBSTR(str,'[^|]*',1,1) IS NOT NULL
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       EXCEPTION
         WHEN OTHERS THEN
         ROLLBACK;
         RAISE;
    END;
Many Thanks,
Arpit

Regex's are known to be CPU intensive specially when dealing with large number of rows.
If you have to reduce the processing time, you need to tune the Select statements.
One suggested change could be to change the following query
SELECT
             REGEXP_SUBSTR(P_EXCEPTION_RECORD, '([^^])+', 1,t2.COLUMN_VALUE) str
        FROM
            DUAL t1 CROSS JOIN
                    TABLE
                        CAST
                            MULTISET
                                SELECT LEVEL
                                FROM DUAL
                                CONNECT BY LEVEL <= REGEXP_COUNT(P_EXCEPTION_RECORD, '([^^])+')
                            AS SYS.odciNumberList
                    ) t2
to
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FROM DUAL
CONNECT BY LEVEL <= REGEXP_COUNT(P_EXCEPTION_RECORD, '([^^])+')
Before looking for any performance benefit, you need to ensure that this does not change your output.
How many substrings are you expecting in the P_EXCEPTION_RECORD? If less than 5, it will be better to opt for SUBSTR and INSTR combination as it might work well with the number of records you are working with. Only trouble is, you will have to write different SUBSTR and INSTR statements for each column to be fetched.
How are you calling this procedure? Is it not possible to work with Collections? Delimited strings are not a very good option as it requires splitting of the data every time you need to refer to.

Wat should be the regular expression for string MT940_UB_*.txt to be used in SFTP sender channel in PI 7.31 ??

Hi All,
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Hi All,
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Regular Expression for replacing Leading Spaces

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