Error while selecting big size xml documetns

Question

Hi !
I'am querying a automatically generated table (by registerSchema) and I'm getting an error when executing the select, in either in sqlplus or odp.net, and it returns a lot of xml data. Do I have to configure something about it?
I'm using oracle 10.2.0.1 over a Suse Linux.
I tried using Oracle 9 as the oci client and it works fine ...
Regards,
Olman

Answer 1

Hi Raghu !
I have found out that the problem is not the xml size, all the problem is about circular references between types, I had to isolate five documents in more than a thousand to discover it.
I read the "Working with circular and Cyclical Dependencies" section of the developers guide, but I still have the problem when executing the query, I'm copying the schema and a sample file below.
Thanks in advance for your help!
Schema:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:prueba="http://www.artinsoft.com/2005/freedom/prueba" xmlns:xdb="http://xmlns.oracle.com/xdb" targetNamespace="http://www.artinsoft.com/2005/freedom/prueba" elementFormDefault="qualified" attributeFormDefault="unqualified">
     <xs:element name="AbstractField" type="prueba:AbstractFieldType"/>
     <xs:complexType name="AbstractFieldType">
          <xs:attribute name="name" type="xs:string"/>
     </xs:complexType>
     <xs:element name="SimpleField" type="prueba:SimpleFieldType" substitutionGroup="prueba:AbstractField"/>
     <xs:complexType name="SimpleFieldType">
          <xs:complexContent>
               <xs:extension base="prueba:AbstractFieldType">
                    <xs:attribute name="x" type="xs:string"/>
               </xs:extension>
          </xs:complexContent>
     </xs:complexType>
     <xs:element name="GroupField" type="prueba:GroupFieldType" substitutionGroup="prueba:AbstractField"/>
     <xs:element name="Record" type="prueba:RecordType" xdb:defaultTable="RECORD"/>
     <xs:complexType name="RecordType">
          <xs:sequence>
               <xs:element name="Fields" type="prueba:FieldsType"/>
          </xs:sequence>
     </xs:complexType>
     <xs:complexType name="MembersType">
          <xs:sequence>
               <xs:element ref="prueba:AbstractField" maxOccurs="unbounded" xdb:SQLInline="false" xdb:defaultTable="GROUP_MEMBER_FIELDS"/>
          </xs:sequence>
     </xs:complexType>
     <xs:complexType name="GroupFieldType">
          <xs:complexContent>
               <xs:extension base="prueba:AbstractFieldType">
                    <xs:sequence>
                         <xs:element name="Members" type="prueba:MembersType" xdb:SQLInline="false" xdb:defaultTable="GROUP_MEMBERS"/>
                    </xs:sequence>
               </xs:extension>
          </xs:complexContent>
     </xs:complexType>
     <xs:complexType name="FieldsType">
          <xs:sequence>
               <xs:element ref="prueba:AbstractField" maxOccurs="unbounded" xdb:SQLInline="false" xdb:defaultTable="RECORD_FIELDS"/>
          </xs:sequence>
     </xs:complexType>
</xs:schema>
Sample document:
<?xml version="1.0" encoding="UTF-8"?>
<Record xmlns="http://www.artinsoft.com/2005/freedom/prueba" xmlns:xdb="http://xmlns.oracle.com/xdb" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.artinsoft.com/2005/freedom/prueba
http://repository:8085/public/schemas/prueba.xsd">
     <Fields>
          <GroupField name="3">
               <Members>
                    <SimpleField name="2"/>
               </Members>
          </GroupField>
     </Fields>
</Record>
Using the sqlplus to query the data (by setting long to a value greater than 430) it just crash, showing a windows dialog box to report the error to Microsoft.
If I use c# to query the table I get this stack trace as soon as I try to create de dom document:
System.Xml.XmlException was unhandled
Message="Data at the root level is invalid. Line 1, position 1."
Source="System.Xml"
LineNumber=1
LinePosition=1
SourceUri=""
StackTrace:
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlTextReaderImpl.Read()
at System.Xml.XmlTextReader.Read()
at test.Class2.sql() in D:\projects\arch\test\test\Class2.cs:line 67
at test.Class2.Main() in D:\projects\arch\test\test\Class2.cs:line 25
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()