CLOB problem

Question

I'm having the following problem processing a CLOB:
num := dbms_lob.getLength(result);
Num gives me a null value, is from type NUMBER
the following prints the content of the clob
xmlstr := dbms_lob.SUBSTR(result,32767);
loop
exit when xmlstr is null;
line := substr(xmlstr,1,instr(xmlstr,chr(10))-1);
dbms_output.put_line('| '||line);
xmlstr := substr(xmlstr,instr(xmlstr,chr(10))+1);
end loop;
What may be the explaination of this? I'm using Oracle 9i
Thank you for attention
Best Regards
João Lopes

Answer 1

Ok thank you for your posts, i'm starting to think that it is a bug... follows my code:
procedure testeXML(idSP in NUMBER)
is
parserXML xmlparser.parser;
dadosAvaria dbms_xmlgen.ctxHandle;
result CLOB;
v_numCons varchar2(10);
xmlstr varchar2(32767);
CURSOR C_numConsorcio is
SELECT num_cons FROM r_identi where num_cons = IdSP;
CURSOR C_equipas is
select ID_equipa from r_eqitec where
substr(to_char(id_tecnico), 0, length(to_char(v_numcons))) = to_char(v_numcons);
v_outra C_numconsorcio%rowtype;
i number :=0;
line varchar2(2000);
doc xmldom.domdocument;
nl xmldom.DOMNodeList;
numeroOcorrencias number;
begin
open C_numConsorcio;
FETCH C_numConsorcio INTO v_outra;
v_numCons := v_outra.num_cons;
close C_numConsorcio;
FOR equipa IN C_equipas LOOP
dadosAvaria := dbms_xmlgen.newContext('SELECT
Id_Avaria,
num_posto,
ps,
CCO_1,
CCO_2,
Operacao,
Sub_Operacao,
sub_esp from r_avari1 where id_equipa = ' || equipa.Id_equipa);
DBMS_XMLGen.setRowTag(dadosAvaria, 'R_Acti_API_SP');
DBMS_XMLGen.SETROWSETTAG(dadosAvaria, 'ListagemAvarias');
result := DBMS_XMLgen.getXML(dadosAvaria);
insert into R_BD_SS_XML_SP(MENSAGEMXML, IDSP, DATAHORA) values (result,v_outra.num_cons,sysdate);
parserXML := xmlparser.newparser;
numeroOcorrencias := -1;
xmlstr := dbms_lob.SUBSTR(result,32767);
end loop;
if result is not null then
xmlparser.parseclob(parserXML, result);
doc := xmlparser.getdocument(parserXML);
xmlparser.freeparser(parserXML);
nl := xmldom.getElementsByTagName(doc, 'ListagemAvarias');
numeroOcorrencias := xmldom.getLength(nl);
end if;
numeroOcorrencias := dbms_lob.getLength(result);
dbms_output.put_line('Existe um total de '||numeroOcorrencias|| ' actividades.');
end testeXML;
This is my code, as in your answer i tried to put my CLOB in a table and then read it from there, but the insert statement tell me that RESULT as a null value, but then it can print the content of result if i make dbms_lob.SUBSTR(result,32767).
This is a very strange situation, do you think that the SUBSTR handles de variable in some way that it can fetch it's content?
Best Regards
João Lopes