Replace a character/string

hi all,
i have string like c:\data\product, i wanted to get c:\\data\\product as output( "\" is replaced as "\\").how to do this.i tried replace string function but iam not the required output.
thanks
ravi

You need to understand regex.
http://www.regular-expressions.info/
Even then, the way you need to escape the backslashes is not exactly intuitive:
str = str.replaceAll("\\\\", "\\\\\\\\");\ is special to regex, so if you want a literal \ in your regex, you have to escape it with another \, but it's also special to the Java compiler. So to get a \ in the regex, you need to give it \\, but you also have to escape each of those for the compiler, so you get \\\\ to get a single literal \ in the regex.

Similar Messages

Replacing a character in a string to another character

hi,
i need to write a function or procedure to replace the character of a string value suppose:
l_error:= 'abcdefghijklmnop' is a string
i need write a function or procedure to replace the character "c" to "z"
that data in l_error is not in any table.
thanks,
AJ

I want to Replace all the Existence of the word - "Test" in a string with "Test1" whereever a space exits before the word Test and someother alphabet after "Test" i.e. Test will be replaced with Test1 if a word starts with Test and contains more alphabets also. For example - TestName should be replaced with Test1Name while MyTest should not be updated to MyTest1.
I have tried to use below query which uses oracle regular expressions -
SELECT REGEXP_REPLACE('MYCOMPANY TEST TESTGEET INDIA PVT LTD TEST','\s(TEST)\w',' TEST1') FROM DUAL
Output -
"MYCOMPANY TEST *TEST1EET* INDIA PVT LTD TEST"
Here, it has also replaced the G also from TESTGEET and resulted in TEST1EET while i want TEST1GEET.
Can someone please suggest how can i do this..... may b m doing some silly mistake but sorry m a newbie to regular expression...
Thanks in advance..

How to replace a character in a string with blank space.

Hi,
How to replace a character in a string with blank space.
Note:
I have to change string CL_DS_1===========CM01 to CL_DS_1               CM01.
i.e) I have to replace '=' with ' '.
I have already tried with <b>REPLACE ALL OCCURRENCES OF '=' IN temp_fill_string WITH ' '</b>
Its not working.

Hi,
Try with this..
call method textedit- >replace_all
exporting
    case_sensitive_mode = case_sensitive_mode
    replace_string = replace_string
    search_string = search_string
    whole_word_mode = whole_word_mode
changing
    counter = counter
exceptions
    error_cntl_call_method = 1
    invalid_parameter = 2.
<b>Parameters</b>      <b> Description</b>    <b> Possible values</b>
case_sensitive_mode    Upper-/lowercase       false Do not observe (default value)
                                                                   true Observe
replace_string                Text to replace the
                                     occurrences of
                                     SEARCH_STRING
search_string                 Text to be replaced
whole_word_mode          Only replace whole words   false Find whole words and
parts of words (default
value)
                                                                           true Only find whole words
counter                         Return value specifying how
                                    many times the search string
                                    was replaced
Regards,
Jayaram...

Replace a character in a String array

I have an array of strings and am trying to replace the ' character with a space. I keep getting either a cannot be applied or cannot resolve symbol error. Can anyone help?
String arrayList = request.getParameter("field");
String newList = arrayList.replace("\'", " ");

the replace method of the String class takes two parameters and both of them are characters not strings use it like this
arrayList.replace('\'', ' ');that should fix it

Replacing a character in a String

Hi All,
How can I replace a character ' which appears in a String into \'

There is a method in String that replaces all
occurrences of one character with anothercharacter.
It's called, hold your breath now, "replace".But tho OP wants to replace one character with two
characters :)You're right, I missed that. Well, serves me right for being sarcastic. :-)

Report error:ORA-06502: PL/SQL: numeric or value error: character string bu

We face the above error in HTMLDB (APEX) application Ver 3.1.0. This occurs when we try to display more number of rows/records in drop-down list (LOV in tabular forms). We are able to display 200 records in LOV. When the list of records exceeds 230, we face the below error
report error:ORA-06502: PL/SQL: numeric or value error: character string buffer too small
the values listed in LOV are from tables (one of the columns in table)
Could anyone give us a solution?

Hi
As you are using a tabular form, you could actually do the following:
1 - In the tabular form column's attributes, set the following:
Display as: Select List (query based on LOV)
Display extra values: Yes
List of values definition: SELECT null d, null r FROM DUAL
2 - Add a new page item and set it to generate your select list
3 - Create an HTML region with no template and use the following for its source:
<script type="text/javascript">
function loadList(c, l)
var s = document.getElementsByName(c);
var lItem = document.getElementById(l);
var lLength = lItem.options.length;
var k;
var j;
var x = lItem.innerHTML;
var v;
var o;
var z;
for (k = 0; k < s.length; k++)
z = s[k];
v = z.value;
z.options.length = 0;
for (j = 0; j < lLength; j++)
o = new Option()
o.value = lItem[j].value;
o.text = lItem[j].text;
z.options[j] = o;
z.value = v;
if (z.selectedIndex == -1)
z.selectedIndex = 0;
loadList("f05", "P1_MGR");
</script>
(Change "f05" and "P1_MGR" as appropriate to your column and your new page item respectively)
Now, when you load the page, the select list contains a null entry plus the entry already on the database. The javascript kicks in automatically, loops through every entry in the "f05" column, copies the existing value, replaces the select list with the new page item version and sets its value to the copied value.
Your new page item could be in a DIV tag that has a style of "display:none" to hide it from view.
Andy

Error PL/SQL: numeric or value error: character string buffer too small

HI oracle gurus,
I am new to PL/SQL,
my oracle version is oracle 11g.
i have create a procedure to insert data from flat file to a table using UTL_FILE.
Table is
CREATE TABLE EXT_PERSON_INFO
ID_PERSON              NUMBER(38),
ID_BATCH             NUMBER(38),
ID_PERSON_NBR        VARCHAR2(3 BYTE),
ID_AREA              VARCHAR2(5 BYTE),
NM_FINAL              VARCHAR2(20 BYTE),
NM_START             VARCHAR2(20 BYTE),
DT_DOB             DATE,
ID_SERIAL               VARCHAR2(9 BYTE),
DT_RESPONSE          DATE,
TRANS_TYPE VARCHAR2(2 BYTE),
REG_RESPONSE VARCHAR2(1 BYTE),
TM_RX          TIMESTAMP(6)
my procedure is
CREATE OR REPLACE PROCEDURE PROC_PERSON
IS
f_line VARCHAR2(2000);
f utl_file.file_type;
f_dir VARCHAR2(250);
fname VARCHAR2(50);
F_ID_PERSON EXT_PERSON_INFO.ID_PERSON%type :=1;
F_ID_BATCH EXT_PERSON_INFO.ID_BATCH%type :=1;
F_ID_PERSON_NBR EXT_PERSON_INFO.ID_PERSON_NBR%type;
F_ID_AREA EXT_PERSON_INFO.ID_AREA%type;
F_NM_FINAL EXT_PERSON_INFO.NM_FINAL%type;
F_NM_START EXT_PERSON_INFO.NM_START%type;
F_DT_DOB EXT_PERSON_INFO.DT_DOB%type;
F_ID_SERIAL EXT_PERSON_INFO.ID_SERIAL%type;
F_DT_RESPONSE EXT_PERSON_INFO.DT_RESPONSE%type;
F_TRANS_TYPE EXT_PERSON_INFO.TRANS_TYPE%type;
F_REG_RESPONSE EXT_PERSON_INFO.REG_RESPONSE%type;
BEGIN
fname := 'D:\raj\raj.txt';
f:= utl_file.fopen('RAJ',fname,'r');
loop
begin
utl_file.get_line(f,f_line);
exception
when no_data_found then
exit;
end;
F_ID_PERSON := 1;
F_ID_BATCH := 1;
F_ID_PERSON_NBR :=substr(f_line,1,3);
F_NM_FINAL := substr(f_line,4,22);
F_NM_START := substr(f_line,23,34);
F_DT_DOB := substr(f_line,35,44);
F_ID_SERIAL := substr(f_line,45,48);
F_DT_RESPONSE := substr(f_line,49,58);
F_TRANS_TYPE := substr(f_line,59,60);
F_REG_RESPONSE := substr(f_line,61,61);
F_ID_AREA := substr(f_line,62,64);
insert into EXT_PERSON_INFO VALUES (F_ID_PERSON,F_ID_BATCH,F_ID_PERSON_NBR,F_ID_AREA,F_NM_FINAL,F_NM_START,F_DT_DOB,F_ID_SERIAL,F_DT_RESPONSE,F_TRANS_TYPE,F_REG_RESPONSE);
end loop;
utl_file.fclose(f);
commit;
end;
am getting error
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
please help me in this regard. unable to trace the issue.
Thanks in advance
Regards,
raj

The error message should have included a line number for you to reference back to your code to know what line the error was occurring on.
That said, look at the documentation for SUBSTR as you are using the third parm incorrectly. It is length, not end position. That's your issue.

Replace " from the string

Hi, I am not able to remove " (double quotes) from a sting.
I am using replace function in webi but getting error.
example sting: Yellow stone"discovery"
i have tried like this: =replace([varible];""";"") but getting error. can anybody help me in removing the " from sting.
Thanks.

Description
Replaces part of a string with another string
Function Group
Character
Syntax
string Replace(string input_string; string string_to_replace; string replace_with)
EX:=Replace ([[variable]]; Char(34) ;"")
Input
input_string                     The input string
string_to_replace             The string within input_string to be replaced
replace_with                    The string to replace string_to_replace with.
Output
The string with the part replaced
Example
Replace ("New YORK";"ORK";"ork") returns "New York"
All the best,
Praveen

ASCII character/string processing and performance - char[] versus String?

Hello everyone
I am relative novice to Java, I have procedural C programming background.
I am reading many very large (many GB) comma/double-quote separated ASCII CSV text files and performing various kinds of pre-processing on them, prior to loading into the database.
I am using Java7 (the latest) and using NIO.2.
The IO performance is fine.
My question is regarding performance of using char[i] arrays versus Strings and StringBuilder classes using charAt() methods.
I read a file, one line/record at a time and then I process it. The regex is not an option (too slow and can not handle all cases I need to cover).
I noticed that accessing a single character of a given String (or StringBuilder too) class using String.charAt(i) methods is several times (5 times+?) slower than referring to a char of an array with index.
My question: is this correct observation re charAt() versus char[i] performance difference or am I doing something wrong in case of a String class?
What is the best way (performance) to process character strings inside Java if I need to process them one character at a time ?
Is there another approach that I should consider?
Many thanks in advance

>
Once I took that String.length() method out of the 'for loop' and used integer length local variable, as you have in your code, the performance is very close between array of char and String charAt() approaches.
>
You are still worrying about something that is irrevelant in the greater scheme of things.
It doesn't matter how fast the CPU processing of the data is if it is faster than you can write the data to the sink. The process is:
1. read data into memory
2. manipulate that data
3. write data to a sink (database, file, network)
The reading and writing of the data are going to be tens of thousands of times slower than any CPU you will be using. That read/write part of the process is the limiting factor of your throughput; not the CPU manipulation of step #2.
Step #2 can only go as fast as steps #1 and #3 permit.
Like I said above:
>
The best 'file to database' performance you could hope to achieve would be loading simple, 'known to be clean', record of a file into ONE table column defined, perhaps, as VARCHAR2(1000); that is, with NO processing of the record at all to determine column boundaries.
That performance would be the standard you would measure all others against and would typically be in the hundreds of thousands or millions of records per minute.
What you would find is that you can perform one heck of a lot of processing on each record without slowing that 'read and load' process down at all.
>
Regardless of the sink (DB, file, network) when you are designing data transport services you need to identify the 'slowest' parts. Those are the 'weak links' in the data chain. Once you have identified and tuned those parts the performance of any other step merely needs to be 'slightly' better to avoid becoming a bottleneck.
That CPU part for step #2 is only rarely, if every the problem. Don't even consider it for specialized tuning until you demonstrate that it is needed.
Besides, if your code is properly designed and modularized you should be able to 'plug n play' different parse and transform components after the framework is complete and in the performance test stage.
>
The only thing that is fixed is that all input files are ASCII (not Unicode) characters in range of 'space' to '~' (decimal 32-126) or common control characters like CR,LF,etc.
>
Then you could use byte arrays and byte processing to determine the record boundaries even if you then use String processing for the rest of the manipulation.
That is what my framework does. You define the character set of the file and a 'set' of allowable record delimiters as Strings in that character set. There can be multiple possible record delimiters and each one can be multi-character (e.g. you can use 'XyZ' if you want.
The delimiter set is converted to byte arrays and the file is read using RandomAccessFile and double-buffering and a multiple mark/reset functionality. The buffers are then searched for one of the delimiter byte arrays and the location of the delimiter is saved. The resulting byte array is then saved as a 'physical record'.
Those 'physical records' are then processed to create 'logical records'. The distinction is due to possible embedded record delimiters as you mentioned. One logical record might appear as two physical records if a field has an embedded record delimiter. That is resolved easily since each logical record in the file MUST have the same number of fields.
So a record with an embedded delimiter will have few fields than required meaning it needs to be combined with one, or more of the following records.
>
My files have no metadata, some are comma delimited and some comma and double quote delimited together, to protect the embedded commas inside columns.
>
I didn't mean the files themselves needed to contain metadata. I just meant that YOU need to know what metadata to use. For example you need to know that there should ultimately be 10 fields for each record. The file itself may have fewer physical fields due to TRAILING NULLCOS whereby all consecutive NULL fields at the of a record do not need to be present.
>
The number of columns in a file is variable and each line in any one file can have a different number of columns. Ragged columns.
There may be repeated null columns in any like ,,, or "","","" or any combination of the above.
There may also be spaces between delimiters.
The files may be UNIX/Linux terminated or Windows Server terminated (CR/LF or CR or LF).
>
All of those are basic requirements and none of them present any real issue or problem.
>
To make it even harder, there may be embedded LF characters inside the double quoted columns too, which need to be caught and weeded out.
>
That only makes it 'harder' in the sense that virtually NONE of the standard software available for processing delimited files take that into account. There have been some attempts (you can find them on the net) for using various 'escaping' techniques to escape those characters where they occur but none of them ever caught on and I have never found any in widespread use.
The main reason for that is that the software used to create the files to begin with isn't written to ADD the escape characters but is written on the assumption that they won't be needed.
That read/write for 'escaped' files has to be done in pairs. You need a writer that can write escapes and a matching reader to read them.
Even the latest version of Informatica and DataStage cannot export a simple one column table that contains an embedded record delimiter and read it back properly. Those tools simply have NO functionality to let you even TRY to detect that embedded delimiters exist let alone do any about it by escaping those characters. I gave up back in the '90s trying to convince the Informatica folk to add that functionality to their tool. It would be simple to do.
>
Some numeric columns will also need processing to handle currency signs and numeric formats that are not valid for the database inpu.
It does not feel like a job for RegEx (I want to be able to maintain the code and complex Regex is often 'write-only' code that a 9200bpm modem would be proud of!) and I don't think PL/SQL will be any faster or easier than Java for this sort of character based work.
>
Actually for 'validating' that a string of characters conforms (or not) to a particular format is an excellent application of regular expressions. Though, as you suggest, the actual parsing of a valid string to extract the data is not well-suited for RegEx. That is more appropriate for a custom format class that implements the proper business rules.
You are correct that PL/SQL is NOT the language to use for such string parsing. However, Oracle does support Java stored procedures so that could be done in the database. I would only recommend pursuing that approach if you were already needing to perform some substantial data validation or processing the DB to begin with.
>
I have no control over format of the incoming files, they are coming from all sorts of legacy systems, many from IBM mainframes or AS/400 series, for example. Others from Solaris and Windows.
>
Not a problem. You just need to know what the format is so you can parse it properly.
>
Some files will be small, some many GB in size.
>
Not really relevant except as it relates to the need to SINK the data at some point. The larger the amount of SOURCE data the sooner you need to SINK it to make room for the rest.
Unfortunately, the very nature of delimited data with varying record lengths and possible embedded delimiters means that you can't really chunk the file to support parallel read operations effectively.
You need to focus on designing the proper architecture to create a modular framework of readers, writers, parsers, formatters, etc. Your concern with details about String versus Array are way premature at best.
My framework has been doing what you are proposing and has been in use for over 20 years by three different major nternational clients. I have never had any issues with the level of detail you have asked about in this thread.
Throughout is limited by the performance of the SOURCE and the SINK. The processing in-between has NEVER been an issu.
A modular framework allows you to fine-tune or even replace a component at any time with just 'plug n play'. That is what Interfaces are all about. Any code you write for a parser should be based on an interface contract. That allows you to write the initial code using the simplest possible method and then later if, and ONLY if, that particular module becomes a bottlenect, replace that module with one that is more performant.
Your intital code should ONLY use standard well-established constructs until there is a demonstrated need for something else. For your use case that means String processing, not byte arrays (except for detecting record boundaries).

Find/Replace Extended Character Set characters in filenames in one pipeline

Hello all,
I have to work with some very bored people. Instead of putting a dash (hex 2d) into a filename, they opt for something from this
set of extended characters, which makes my regular expressions fail. IS there a way I can efficiently find & replace anything outside the standard character set
in one pipelinewithout finding and replacing a character at a time?
So,I'd like something like:
get-childitem * | where-object $_.name -match '\x99' | rename-item -newname { $_.name -replace '\x99','='}
from hex 80 to hex FF rather than a for-each.
Thanks.

Answer would depend on the way you want to replace... Easier if you want replace any char in set with selected char:
$Name = -join (180..190|%{[char]$_})
New-Item -ItemType File -Name $Name
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
} -WhatIf
But if you want it more complicated, you may do that too. E.g. defining hashtable that can be used to replace individual elements:
$Replacer = @{}
foreach ($Char in (180..190 | % { [char]$_ })) {
$Replacer.Add(
[string]$Char,
(echo _, -, =, . | Get-Random)
$Replacer
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
$Replacer[$args[0].Value]
} -WhatIf
Using this syntax make it possible to include some logic in replace. E.g. you could easily use switch to decide what to do with given string:
Get-ChildItem * | Rename-Item -NewName {
[regex]::Replace(
$_.Name,
'[\xB4-\xBE]',
switch ($args[0].Value) {
º { "0" }
µ { "u" }
¹ { "1" }
¸ { "," }
Default { "_" }
} -WhatIf

Replacing chars in strings

Here is the situation:
int x=4
char letter1='Z'
String word1="blah blah"
/code]
I was wonering if the was an easy way of replacing a character in a string with another at a ceratin point in the string. In this case, I want a string that would say "blahZblah". Thanks.

Sure
int x=4
char letter1='Z'
String word1="blah blah"
[String word2 = word1.substring(0,x) + letter1 + word.substring(x + 1)[/b]

Wrong forum!!! character string buffer too small problem

Hi,
I'm using a pl/sql procedure which builds a string held by a VARCHAR2 variable, however i've just discovered that in certain situations this string exceeds 2000 characters and i get this error:-
ORA-20500: ORA-06502: PL/SQL: numeric or value error: character string buffer too small
How can i stop this from happening. Do i need to use another datatype??
PROCEDURE p_build_string(p_string_to_build IN OUT VARCHAR2
,p_string_to_add IN VARCHAR2
,p_delimiter IN VARCHAR2) IS
BEGIN
/* initialise string */
IF INSTR(p_string_to_add,'''') <> 0 THEN
IF p_string_to_build IS NULL THEN
p_string_to_build := ''''||REPLACE(p_string_to_add,'''','''''')||'''';
l_number_of_string_items := 1;
ELSE
p_string_to_build := p_string_to_build||p_delimiter||''''||REPLACE(p_string_to_add,'''','''''')||'''';
l_number_of_string_items := l_number_of_string_items + 1;
END IF;
ELSE
IF p_string_to_build IS NULL THEN
p_string_to_build := ''''||p_string_to_add||'''';
l_number_of_string_items := 1;
ELSE
p_string_to_build := p_string_to_build||p_delimiter||''''||p_string_to_add||'''';
l_number_of_string_items := l_number_of_string_items + 1;
END IF;
END IF;
dbms_output.put_line(l_number_of_string_items || ' ' ||p_string_to_build);
END;
Message was edited by:
david_wood

I'm not suggesting this is your problem, but
select status
into v_status,
from registration_offender_xref But you have declared
v_status varchar2(10);Much better to declare things like this
v_status registration_offender_xref.status%type;That way you know your variable is declared with a proper length, if the column length ever changes ... your code doesn't go kaboom.
Cheers,

Listener Error - character string buffer too small (ORA-06502)

I am running into a very strange problem with the APEX listener on seemingly random pages. I can hit every page in my application just fine, but as soon as I hit this specific one, Glassfish throws an HTTP 500 error. If I click Debug, the page seems to load fine with no indications of trouble, but as soon as I turn debug back off, it goes back to the HTTP 500 error. I don't see anything special about the page that makes this happen. It is pretty simple and has 4 regions. I have noticed that if I set any 1 of the 4 regions to "Never display", the page loads fine. It's like having all 4 of them enabled at once are causing some overload, even though it's actually a smaller amount of data than most of my other pages.
**Update: I just discovered this only happens if I'm logged into the workspace first and then try to run the page! If I log out of APEX and then hit the application as a normal user, page loads error-free. This is still an annoying problem, but at least it seems I have a decent workaround since regular users never see it.
After a couple days, I noticed the exact same problem on a second APEX application I'm using. Again, it is on some random page whereas all the other pages work fine.
Both applications and pages in question worked without issue in APEX 3.x. I am trying to get an APEX application up and running on the latest version.
I have tried both Glassfish server and simply downloading the latest listener (version 1.1.1) and running it in standalone mode. I get the problem both ways, which is why it seems it's a listener issue.
I have seen a few other threads of people having this problem, but I never did find anyone with a solution, and most of the posts stopped back in December.
Some details on my environment:
Database version: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
APEX version: 4.0.2
Webserver: Glassfish 3.1
Here is the log entry from Glassfish when the HTTP 500 error displays as I try to load one of the bugged pages.
[#|2011-05-10T21:14:22.967-0500|INFO|oracle-glassfish3.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=111;_ThreadName=Thread-1;|MaxConnectionReuseCount=50000|#]
[#|2011-05-10T21:14:46.431-0500|SEVERE|oracle-glassfish3.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=112;_ThreadName=Thread-1;|
***********ERROR***********
init: # headers=46
declare nm owa.vc_arr := ?;
vl owa.vc_arr := ?;
begin
owa.init_cgi_env( ?, nm, vl );
htp.init; htp.HTBUF_LEN := 63;
? := sys_context('USERENV','SID');
end;
SID:1242
CALL:
begin
f(p=>?);
commit;
end;
BINDS
p:100:2:220529248574492::NOPAGE CALL:
declare
nlns number := 999999;
l_clob CLOB;
lines htp.htbuf_arr;
l_buff varchar2(32767);
l_clob_init boolean:= false;
l_file varchar2(5);
l_doc_info varchar2(1000);
begin
OWA.GET_PAGE(lines, nlns);
if (nlns > 1) then
for i in 1..nlns loop
if ( length(lines(i)) > 0 ) then
if ( ( lengthb(l_buff) + lengthb(lines(i))) > 32767) then
if (NOT l_clob_init) then
dbms_lob.createtemporary(l_clob, TRUE);
dbms_lob.open(l_clob, dbms_lob.lob_readwrite);
l_clob_init:=true;
end if;
dbms_lob.writeappend(l_clob,length(l_buff),l_buff);
l_buff := lines(i);
else
l_buff := l_buff || lines(i);
end if;
end if;
end loop;
end if;
if (l_clob_init) then
dbms_lob.writeappend(l_clob,length(l_buff),l_buff);
l_buff := '';
end if;
? := l_clob;
? := l_buff;
if (wpg_docload.is_file_download) then l_file:='TRUE'; wpg_docload.get_download_file(l_doc_info); else l_file := 'FALSE'; end if; ? := l_file;
? := l_doc_info;
end;
get_page FAILED:ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 33
Edited by: BrianB on May 11, 2011 7:50 AM
Edited by: BrianB on May 11, 2011 8:01 AM

Brian,
this post is going to get a bit longer, so the summary comes first.
h6. Summary
1. I could reproduce the problem on my system using the APEX Listener in standalone mode.
2. I don't think the problem is content-related in the sense that you have any issue in your page or database contents.
3. I have a workaround for your problem.
h6. Error message
Having that error in my environment made me start to think. I not only disabled some item and got it work, but I could also add something to achieve this effect.
So I came to think, this really is somewhere deep down. The error message doesn't seem very helpful on first sight, but when starting to follow on what's happening there, things get clearer:
APEX generates pages dynamically, replacing substitution strings and other tokens to get the actual page definition. This has to be read by a requesting client. The use of VARCHAR2 as buffer introduces a limit of 32767 bytes, after which the contents is handled as CLOB instead.
h6. Analysis
Obviously, there are cases where the "estimation" fails. Of course, this is may only be relevant in rare cases, because:
1. If a page would exceed the maximum without some charset interpretation problem, the buffer would be switched to clob.
2. If a page stays small enough to stay below 32767 even with some characters that are acutally larger then expected, the buffer isn't busted.
To find out, if your could be one of these rare cases, I investigated the HTTP headers, focussing on X-DB-Content-length and made an odd observation.
Test case 1: "Go" button disabled, so the page runs fine with APEX Listener
1. It has *31968 bytes* when coming from APEX Listener with a Go button disabled.
2. It has *31938 bytes* according to the header set by EPG - for exactly the same page.
That makes a difference of 30 bytes for what is expected to be the same contents.
Test case 2: The button is enabled again
1. This causes the page load to crash in APEX Listener.
2. EPG transports *32341 bytes* according to that header.
So we are pretty close to the hard limit for the VARCHAR2 buffer.
For some reason, APEX Listener seems to cause a false calculation of the actual page size. Whether this is due to some charset problem or due to some other problem with response handling, I don't know. The 30 bytes difference may result from the odd header "X-ORACLE-IGNORE" with value "IGNORE, IGNORE, IGNORE, IGNORE" sent by the APEX Listener. This value has exactly 30 bytes in length, but this could be coincidence, as there are more differences in headers. If I add the size of all headers, we are even closer to the buffer limit and probably exceed it when some items need more bytes than expected.
This could even be as simple as a line break, as your page has about 424 lines when I disabled the button... Adding 1 byte per line to the 32341 bytes of the EPG, I get 32765 bytes. Now add that button (403 bytes difference on EPG) and you exceeed the limit. Reduce that value by the line count again and you are still below.
Could be coincidence as well, but makes me wonder.
h6. Workaround
To make sure that we were actually hitting that limit, I now introduce my suggestion for a workaround.
Test case 3: Add a hidden item
1. APEX Listener loads the page, stating the size to be *32876 bytes*
2. EPG sees 30 bytes less and transmits the header with *32846 bytes*
h6. Conclusion
I can't give you a real solution for that problem, nor do I have a definitive answer on what is the root cause for it. It seems, only one of the developers may find it. But I can offer you a workaround, which is to just add some hidden item to your page so it exceeds the limit for the VARCHAR2 buffer and gets handled as clob.
Note that this may occur outside the app builder as well. The app builder just renders some additional items when starting that page, so it has a different size from its productive representation. On the other hand, I may start counting the size of that additional page section - I wouldn't wonder if that results in a value around 400 bytes, and this is the forgotten part...
Unfortunately, if it actually is happening outside of the app builder, this workaround isn't very handy: Dynamic contents can't be calculated that easy all the time, so you may have cases where you just don't know in advance if you are close to the limit and have to add some item to exceed it or if you've already exceeded it or if you are far below, or close enough to actually hit it when adding just one byte...
-Udo

Replace single character and leave the ones in expressions

Hi,
I'm looking for nice and elegant solution to my problem. Let's say I have a string "e+exp(e)". I want to replace all "e" with "1", excepts the one in "exp". I was trying to use regular expressions but I've failed after an hour... The solution should be able to solve things like replace "a" in "rand(a)" without changing rand. Basically I need to replace single character without replacing the ones in words/expressions.
Any ideas?
Certified LabVIEW Developer, Certified TestStand Developer
Solved!
Go to Solution.

No time for elegance right now, just brute force. I would pad the string with spaces on each end to remove end cases and then search for the character surrounded by non-word characters.
Message Edited by Darin.K on 04-14-2010 04:06 PM
Attachments:
VariableParsingRegex.png ‏18 KB

ORA- 06502: PL/SQL: numeric or value error: character string buffer too sma

Hi Everybody,
Please, I Need of Your Help.
We have a table with the following characteristics:
PS_NAMES ( EMPLID VARCHAR2(33), NAME VARCHAR2(150), ... )
In this table a Trigger exists...
CREATE OR REPLACE TRIGGER TG_NAMES
BEFORE UPDATE ON PS_NAMES
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
Declare
vemplid ps_names.emplid%type;
vname ps_names.name%type;
Begin
vname := substr(:new.name,1,45);
end;
When the register is updated and the field PS_NAMES.NAMES has a bigger or equal content that 45 characters and with a character special, happen the error: "ORA- 06502: PL/SQL: numeric or value error: character string buffer too small".
This happens for any bigger or equal name the 45 characters and that it contains a character special.
Thanks,
MÃ¡rcio Ap. Silveira

paddy wrote:
Hi,
I have check that part. The out parameter is getting populated correctly. I tried even removing the out parameter. Still it failed.And still you haven't provided all the details.
What about col1, col2, and the actual definition/declaration for ot_MY_OBJECT_TYPE?
How can we see any of the datatypes and where the issue could be if you don't bother to supply us with the information. Our crystal balls are broken and in the shop for fixing at the minute.

Replace a character/string

Similar Messages

Maybe you are looking for