Report error:ORA-06502:character string buffer too small. urgent!!

Hi guys,
My APEX version is 3.0.1.00.08, my application run on my test environment, but on PROD environment, it raised the error:
report error:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
In this page, on the left is a tree, the right side is a tabular form, when I click one tree node, it will pass the current node id to the form and the form will display the children data. When I click some tree node, it will raise the ORA-06502 error, but when click some other nodes, it is correct. I don't know why. And on my test environment, it has no this error, the test environment has same version with prod environment, only has less data in database. Could you help me???
I searched in forum, someone says it's LOV problem, if it's LOV problem, all the nodes should have error, why click some nodes are ok?
Thanks !
Jessica

I don't think it is related only to the number of rows but also to the content of the rows. So, counting only the number of rows doesn't say anything about if it is going to work or not. My question: can't you filter those entries? Making a choice between 250 entries in a tabular form isn't a simple task. Using popup-key LOV instead would also be a solution. However, if you use popup-key LOV be aware of the fact that you need two index numbers for those.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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Edited by: OracleNoob on Feb 17, 2009 10:58 AM

Hi,
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If you need mnore help, post
(1) The version of Oracle (and any other relevant software) you're using
(2) A little sample data (just enough to show what the problem is) from all the relevant tables
(3) The results you want from that data
(4) Your formatted code
(5) The full error message(s), including line number
Executable SQL statements (like "CREATE TABLE AS ..." or "INSERT ..." statements) are best for (2).
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...ui types
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ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at line 3
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bit Production
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Thanks,
Message was edited by:
venkatraman.L

Tx for ur Response
I didnt get any log when i excute this..... But it is woking fine in pl/sql Block .. But when i call from PHP page it Gives the Error
Re: ORA 06512: Character String Buffer Too Small.
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open v_p for v_stmt ;
v_pmResult:=1;
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Hi All,
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Also please let me if this is good solution :- Have the report status in excel sheet and attach to the email.
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ORA-06502: PL/SQL: numeric or value error: character string buffer too small
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ORA-06512: at line 2
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</style>
<center><b><font face="Arial">Summary Report '
            || '<br><br></font></b></center>'
            || ' <div align="center"><table width="90%" border="1" cellspacing="0" cellpadding="1"'
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            || 'Report</b></td><td align="center"><font size="3"> <b>'
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                FOR curr_refresh IN (SELECT
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                                     ROUND(((ARH.RUN_END_TIME-ARH.RUN_START_TIME)*24*60),2) RUN_TIME,
                                     ARH.JOB_STATUS STATUS
                                     FROM
                                     REPORT_HISTORY ARH,REPORT AN
                                     WHERE
                                     ARH.RUN_START_TIME>TO_DATE(SYSDATE-93)
                                     AND AN.report_ID=ARH.report_ID
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          '<tr><td align="center">'|| curr_refresh.report_name|| '</td><td align="center">'|| curr_refresh.RUN_TIME ||
          '</td><td align="center">'|| curr_refresh.STATUS ||
           '</td><td align="center">' || UTL_TCP.CRLF;
            exit when length (l_an_report) > 32767;
      END LOOP;
       l_an_report := l_an_report || '</table><br><br>';
            FOR curr_email IN (SELECT global_name instance_name,
            REU.EMAIL_USER_LAST_NAME last_name,
            REU.EMAIL_USER_FIRST_NAME first_name,
            REU.EMAIL_USER_EMAIL_ID,
            '[email protected]' mail_from
                             FROM EMAIL_USER REU, EMAIL_GROUP REG,GLOBAL_NAME
                                         WHERE REU.EMAIL_GROUP_ID = REG.EMAIL_GROUP_ID
                                               AND REG.EMAIL_GROUP_NAME ='IT') LOOP
            cnxn := UTL_SMTP.open_connection('smtprelay.ats.com', 25);
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            UTL_SMTP.mail(cnxn, '[email protected]');
            UTL_SMTP.rcpt(cnxn, curr_email.EMAIL_USER_EMAIL_ID);
               l_header := 'MIME-Version: 1.0'||'
               To: ' || curr_email.last_name || ' <' || curr_email.EMAIL_USER_EMAIL_ID || '>
               From: ' || curr_email.mail_from || '
               Subject: Summary Report for ' || curr_email.instance_name || ' on ' || to_char(sysdate, 'DD-MON-YYYY') || '
               Reply-To: [email protected]
               Content-Type: text/html;' || UTL_TCP.CRLF || UTL_TCP.CRLF;
            UTL_SMTP.data(cnxn, l_header || l_an_report);
            UTL_SMTP.quit(cnxn);
      END LOOP;
END PRC_SUMMARY;Please share your thoughts.
Regards,
Sunny

>
It worked fine from last six months but today it failed because of the length of characters (more reports are added).
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
>
The error is because you don't check the length of 'l_an_report' until it is already too long.
This code checks the length AFTER adding to it.
>
l_an_report := l_an_report ||
'<tr><td align="center">'|| curr_refresh.report_name|| '</td><td align="center">'|| curr_refresh.RUN_TIME ||
'</td><td align="center">'|| curr_refresh.STATUS ||
'</td><td align="center">' || UTL_TCP.CRLF;
exit when length (l_an_report) > 32767;
>
You need to test the length of the new string to be added to make sure it won't cause 'l_an_report' to be too long
-- add a new variable in the declare section
v_new_string VARCHAR2(2000);
-- in loop do calc
v_new_string := '<tr><td align="center">'|| curr_refresh.report_name|| '</td><td align="center">'|| curr_refresh.RUN_TIME ||
          '</td><td align="center">'|| curr_refresh.STATUS ||
           '</td><td align="center">' || UTL_TCP.CRLF;
-- test length
IF (length(v_new_string) + length (l_an_report) > 32767 THEN EXIT;But as others have said if you need to handle lengths > 32767 then use an attachment as shown in the links provided.

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            Class.forName("oracle.jdbc.driver.OracleDriver");
            // create connection
            c=DriverManager.getConnection(UI.jTxtConStr.getText(),UI.jTxtUsr.getText(),UI.jTxtPsw.getText());
            //create statement
            Statement stmt=c.createStatement();
            ResultSet rs=stmt.executeQuery(UI.jTxtAreaSQL.getText());//resulset pe baza a ceea ce e in TextArea din UI
            //get the result
            while(rs.next()){
                is=rs.getClob(1).getAsciiStream();
            }I need the ascii stream in order to do a transform provided by apache xalan...
what can I do about it? how can I get the ascii stream of the xmldata(xmltype)?

Maybe a possibility would be to let the query return an XMLType instead of a CLOB or VARCHAR2 and then you can do the transformation on the server in Java instead of on the database. We tried something similar for a PL/SQL procedure:
public Document getXML() {
try {
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
java.sql.Connection connecton =
DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL",
"scott", "tiger");
oracle.jdbc.OracleCallableStatement statement =
(oracle.jdbc.OracleCallableStatement)connecton.prepareCall("BEGIN \"WEBSERVICE\".TEST_XML(:1 ); END;");
statement.registerOutParameter(1, OracleTypes.OPAQUE,
"SYS.XMLTYPE");
statement.executeUpdate();
//Object out = statement.getObject(1);
XMLType xml = XMLType.createXML(statement.getOPAQUE(1));
statement.close();
System.out.println("out: " + xml);
return xml.getDOM();
} catch (Exception e) {
e.printStackTrace();
return null;
The WEBSERVICE.TEST_XML procedure returns data as an XMLType object.
Regards,
Ronald

Character string buffer too small

ORA-19011: Character string buffer too small
My query is regarding the above error. I have a requirement to concatenate two XMLType columns in the result set and am running into the above issue. Can you please let me know how I can workaround the above problem.
Thanks,
YM

Error:     ORA-19011 (ORA-19011)
Text:     Character string buffer too small
Cause:     The string result asked for is too big to return back
Action:     Get the result as a lob instead

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

Hi there...
I'm sugin 9Iasv2 Portal.
When i clik on the "approbations" tab in the parameters of a page, i always get this error :
Erreur : ORA-06502: PL/SQL: numeric or value error: character string buffer too small
Could you please help me ?
regards
Arnaud

Please report this problem to Oracle Support.

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

Report error:ORA-06502:character string buffer too small. urgent!!

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