Duplicate Records in Out-Of-Line Tables

Question

Hi,
I am using the following XML Schema:
<?xml version="1.0"?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified"
xmlns:t="http://www.informatik.hu-berlin.de/~vitt/stud/studienarbeit/test-duplicates"
xmlns:xdb="http://xmlns.oracle.com/xdb"
targetNamespace="http://www.informatik.hu-berlin.de/~vitt/stud/studienarbeit/test-duplicates"
>
<xs:complexType name="eltype" xdb:SQLType="ELTYPE">
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="nid" xdb:SQLName="NID" type="xs:ID"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:element name="outerElement" xdb:defaultTable="OUTER_ELEMENT">
<xs:complexType>
<xs:sequence>
<xs:element name="innerElement" type="t:eltype" maxOccurs="unbounded"
xdb:SQLInline="false" xdb:defaultTable="INNER_ELEMENT"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
When inserting the XML document:
<?xml version="1.0"?>
<t:outerElement
xmlns:t="http://www.informatik.hu-berlin.de/~vitt/stud/studienarbeit/test-duplicates"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.informatik.hu-berlin.de/~vitt/stud/studienarbeit/test-duplicates
http://www.informatik.hu-berlin.de/~vitt/stud/studienarbeit/schemas/test-duplicates.xsd">
<t:innerElement nid="one">Eins</t:innerElement>
<t:innerElement nid="two">Zwei</t:innerElement>
</t:outerElement>
once into the previously empty OUTER_TABLE table, the innerElements appear twice:
SQL> select * from inner_element;
SYS_NC_ROWINFO$
<t:innerElement nid="one">Eins</t:innerElement>
<t:innerElement nid="two">Zwei</t:innerElement>
<t:innerElement nid="one">Eins</t:innerElement>
<t:innerElement nid="two">Zwei</t:innerElement>
SQL>
Is there a way to avoid this? Or is this an issue which has been fixed in an Oracle newer than my 9.2.0.1?
Kind Regards,
Thorsten

Answer 1

Mark,
thanks for your reply.
You must upgradeThis is in progress, I hope ...
BTW Did you export and import the content of the
table I cannot get importing to work. Appearently, the INNER_ELEMENT's root element name,
innerElement, does not make it to the import utility:
IMP-00017: following statement failed with ORACLE error 1741:
"CREATE TABLE "VITT"."INNER_ELEMENT" OF "SYS"."XMLTYPE" XMLSCHEMA "http://w"
"ww.informatik.hu-berlin.de/~vitt/stud/studienarbeit/schemas/test-duplicates"
".xsd" ELEMENT "" PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS L"
"OGGING STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 214748364"
"5 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPA"
"CE "VITT" "
IMP-00003: ORACLE error 1741 encountered
ORA-01741: illegal zero-length identifier
grep finds it in the dump file, though.
and does the table use nested table storage.No. But the problem persists if I do so.
Kind regards,
Thorsten