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我的目標是通過Oracle 10g創建一個xml文件，我使用庫dbms_xmldom來實現此目的。 當我嘗試檢索通過getClobVal功能的XMLType創建CLOB，服務器顯示ORA-06502: PL/SQL: numeric or value error.xmltype.getClobVal：ORA-06502：PL/SQL：數字或值錯誤
我的計劃：
DECLARE
l_xmltype XMLTYPE;
l_domdoc dbms_xmldom.DOMDocument;
l_root_node dbms_xmldom.DOMNode;
l_reunion_element dbms_xmldom.DOMElement;
l_reunions_node dbms_xmldom.DOMNode;
l_r_element dbms_xmldom.DOMElement;
l_r_node dbms_xmldom.DOMNode;
l_reunion_element dbms_xmldom.DOMElement;
l_reunion_node dbms_xmldom.DOMNode;
l_course_element dbms_xmldom.DOMElement;
l_course_node dbms_xmldom.DOMNode;
l_eng_element DBMS_XMLDOM.DOMELEMENT;
l_eng_node DBMS_XMLDOM.DOMNODE;
l_tp_element DBMS_XMLDOM.DOMELEMENT;
l_tp_node DBMS_XMLDOM.DOMNODE;
BEGIN
-- Create an empty XML document
l_domdoc := dbms_xmldom.newDomDocument;
-- Create a root node
l_root_node := dbms_xmldom.makeNode(l_domdoc);
-- Create a new node Departments and add it to the root node
--l_reunion_element :=
l_reunions_node := dbms_xmldom.appendChild(l_root_node,dbms_xmldom.makeNode(dbms_xmldom.createElement(l_domdoc, 'donnees_reference_externes')));
-- réunion
FOR re IN (select rc.identifiant, nvl(rc.date_report, RC.DATE_REUNION) date_reunion from reunion_course rc where date_reunion = '24/01/2014')
LOOP
l_r_element := dbms_xmldom.createElement(l_domdoc, 'grep');
dbms_xmldom.setAttribute(l_r_element, 'ID', re.identifiant);
dbms_xmldom.setAttribute(l_r_element, 'Date', re.date_reunion);
l_r_node := dbms_xmldom.appendChild(l_reunions_node,dbms_xmldom.makeNode(l_r_element));
-- course de la réunion selectionnée
FOR rc in (select * from course where id_reunion_course = re.identifiant)
LOOP
l_course_element := DBMS_XMLDOM.CREATEELEMENT(l_domdoc, 'ep');
DBMS_XMLDOM.SETATTRIBUTE(l_course_element, 'ID', rc.identifiant);
DBMS_XMLDOM.SETATTRIBUTE(l_course_element,'Prix', rc.nom_prix);
l_course_node := DBMS_XMLDOM.APPENDCHILD(l_r_node, DBMS_XMLDOM.MAKENODE(l_course_element));
FOR rg in (select SIT.NUMERO_PMU, CH.NOM nom_cheval from situation_engagement_course sit, cheval ch where SIT.ID_CHEVAL = ch.identifiant and sit.id_course = rc.identifiant and SIT.CODE_ETAT = 'PARPR')
LOOP
l_eng_element := DBMS_XMLDOM.CREATEELEMENT(l_domdoc, 'ap');
DBMS_XMLDOM.SETATTRIBUTE(l_eng_element, 'NomCheval', rg.nom_cheval);
DBMS_XMLDOM.SETATTRIBUTE(l_eng_element,'NPMU', rg.numero_pmu);
l_eng_node := DBMS_XMLDOM.APPENDCHILD(l_course_node, DBMS_XMLDOM.MAKENODE(l_eng_element));
END LOOP;
l_tp_element := DBMS_XMLDOM.CREATEELEMENT(l_domdoc, 'ofr');
DBMS_XMLDOM.SETATTRIBUTE(l_tp_element, 'av_pg', rc.code_type_evenement_pari);
DBMS_XMLDOM.SETATTRIBUTE(l_tp_element,'epba_ofr', 1);
l_tp_node := DBMS_XMLDOM.APPENDCHILD(l_course_node, DBMS_XMLDOM.MAKENODE(l_tp_element));
END LOOP;
END LOOP;
l_xmltype := dbms_xmldom.getXmlType(l_domdoc);
dbms_xmldom.freeDocument(l_domdoc);
dbms_output.put_line(l_xmltype.getClobVal); --------------> in this line ERROR Displays : ORA-06502: PL/SQL: numeric or value error **
END;
感謝。