Oracle 10g R2 - Metadata Issue With Version Controlled Resources

Question

We are trying to utilize the Oracle 10g R2 feature that allows user-defined metadata to be attached to XML DB resources. However, we are encountering errors when we try to append/attach metadata to a version-controlled resource (VCR). The following steps were followed:
1. Register a new schema to be used for metadata (XMLSCHEMA.registerSchema).
2. Add a new resource to to the XML DB and make it version controlled (DBMS_XDB.createResource and DBMS_XDB_VERSION.makeVersioned).
3. Checkout the newly created version-controlled resource (DBMS_XDB_VERSION.checkout)
4. Add metadata to the version-controlled resource (DBMS_XDB.appendResourceMetadata)
However, after step 4, the errors shown below are encountered:
========================================================
begin
ERROR at line 1:
ORA-00600: internal error code, arguments: [qmxStrCopy: INLOB 2], [], [], [],
ORA-06512: at "XDB.DBMS_XDB", line 890
ORA-06512: at line 2
========================================================
The steps followed for adding metadata to a resource were taken from Chapter 26 of the "Oracle XML DB Developer's Guide 10G Release 2" (http://download-east.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb_repos_meta.htm#sthref2302).
Is is possible to append and maintain metadata to an XML DB version controlled resource (VCR)? If so, what are the correct steps to do this? Note that if this is tried with a resource that is not version controlled, then no errors are encountered.
Thanks,
Steve

Answer 1

It appears that this issue has been solved in the next release of the database
QL> spool testcase.log
SQL> --
SQL> connect &1/&2
Connected.
SQL> --
SQL> var schemaURL varchar2(256)
SQL> var schemaPath varchar2(256)
SQL> var resourcePath varchar2(256)
SQL> --
SQL> begin
  2    :schemaURL := 'metadata.xsd';
  3    :schemaPath := '/public/metadata.xsd';
  4    :resourcePath := '/public/metadataTest.txt';
  5  end;
  6  /
PL/SQL procedure successfully completed.
SQL> call dbms_xmlSchema.deleteSchema(:schemaURL,4)
  2  /
Call completed.
SQL> declare
  2    res boolean;
  3    xmlSchema xmlType := xmlType(
  4  '<?xml version="1.0" encoding="UTF-8"?>
  5  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xdb="http://xmlns.oracle.com/xdb" elementFormDefault="qualified" attributeFormDefault="unqualified" xdb:storeVarrayAsTable="true">
  6          <xs:element name="root" type="rootType" xdb:defaultTable="METADATA_TABLE"/>
  7          <xs:complexType name="rootType" xdb:SQLType="METADATA_ROOT_T">
  8                  <xs:sequence>
  9                          <xs:element name="child" type="childType"/>
10                  </xs:sequence>
11          </xs:complexType>
12          <xs:complexType name="childType" xdb:SQLType="METADATA_CHILD_T">
13                                  <xs:sequence>
14                                          <xs:element name="Child1" type="xs:string"/>
15                                          <xs:element name="Child2" type="xs:string"/>
16                                  </xs:sequence>
17          </xs:complexType>
18  </xs:schema>
19  ');
20  begin
21    if (dbms_xdb.existsResource(:schemaPath)) then
22      dbms_xdb.deleteResource(:schemaPath);
23    end if;
24    res := dbms_xdb.createResource(:schemaPath,xmlSchema);
25  end;
26  /
PL/SQL procedure successfully completed.
SQL> begin
  2    dbms_xmlschema.registerSchema
  3    (
  4      :schemaURL,
  5      xdbURIType(:schemaPath).getClob(),
  6      TRUE,TRUE,FALSE,TRUE,
  7      enableHierarchy=>DBMS_XMLSCHEMA.ENABLE_HIERARCHY_RESMETADATA
  8    );
  9  end;
10  /
PL/SQL procedure successfully completed.
SQL> declare
  2    res boolean;
  3  begin
  4    if dbms_xdb.existsResource(:resourcePath) then
  5      dbms_xdb.deleteResource(:resourcePath,4);
  6    end if;
  7    res := dbms_xdb.createResource(:resourcePath,'Mary Had a Little Lamb');
  8  end;
  9  /
PL/SQL procedure successfully completed.
SQL> commit
  2  /
Commit complete.
SQL> select xdbUriType(:resourcePath).getClob()
  2  from dual
  3  /
XDBURITYPE(:RESOURCEPATH).GETCLOB()
Mary Had a Little Lamb
SQL> declare
  2    resid raw(16);
  3  begin
  4    resid := dbms_xdb_version.makeVersioned(:resourcePath);
  5  end;
  6  /
PL/SQL procedure successfully completed.
SQL> commit
  2  /
Commit complete.
SQL> begin
  2    dbms_xdb_version.checkout(:resourcePath);
  3  end;
  4  /
PL/SQL procedure successfully completed.
SQL> commit
  2  /
Commit complete.
SQL> set long 10000 pages 0 lines 150
SQL> --
SQL> select r.res.getClobVal()
  2    from resource_view r
  3   where equals_path(res,:resourcePath) = 1
  4  /
<Resource xmlns="http://xmlns.oracle.com/xdb/XDBResource.xsd" Hidden="false" Inv
alid="false" VersionID="1" ActivityID="0" Container="false" CustomRslv="false" V
ersionHistory="false" StickyRef="true">
  <CreationDate>2006-06-10T05:01:25.355009</CreationDate>
  <ModificationDate>2006-06-10T05:01:25.355009</ModificationDate>
  <DisplayName>metadataTest.txt</DisplayName>
  <Language>en-US</Language>
  <CharacterSet>UTF-8</CharacterSet>
  <ContentType>text/plain</ContentType>
  <RefCount>1</RefCount>
  <ACL>
    <acl description="Public:All privileges to PUBLIC" xmlns="http://xmlns.oracl
e.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:sch
emaLocation="http://xmlns.oracle.com/xdb/acl.xsd                           http:
//xmlns.oracle.com/xdb/acl.xsd">
      <ace>
        <grant>true</grant>
        <principal>PUBLIC</principal>
        <privilege>
          <all/>
        </privilege>
      </ace>
    </acl>
  </ACL>
  <Owner>SCOTT</Owner>
  <Creator>SCOTT</Creator>
  <LastModifier>SCOTT</LastModifier>
  <SchemaElement>http://xmlns.oracle.com/xdb/XDBSchema.xsd#binary</SchemaElement
>
  <Contents>
    <text>Mary Had a Little Lamb</text>
  </Contents>
  <VCRUID>15DE79F263F7CC00E040578C2A0656F8</VCRUID>
</Resource>
SQL> begin
  2    dbms_xdb.appendResourceMetadata(:resourcePath,xmltype(
  3  '<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4         xsi:noNamespaceSchemaLocation="metadata.xsd">
  5      <child>
  6        <Child1>AAA</Child1>
  7        <Child2>BBB</Child2>
  8      </child>
  9  </root>'));
10  end;
11  /
PL/SQL procedure successfully completed.
SQL> commit
  2  /
Commit complete.
SQL> select r.res.getClobVal()
  2    from resource_view r
  3   where equals_path(res,:resourcePath) = 1
  4  /
<Resource xmlns="http://xmlns.oracle.com/xdb/XDBResource.xsd" Hidden="false" Inv
alid="false" VersionID="0" ActivityID="0" Container="false" CustomRslv="false" V
ersionHistory="false" StickyRef="true">
  <CreationDate>2006-06-10T05:01:25.355009</CreationDate>
  <ModificationDate>2006-06-10T05:01:25.558913</ModificationDate>
  <DisplayName>metadataTest.txt</DisplayName>
  <Language>en-US</Language>
  <CharacterSet>UTF-8</CharacterSet>
  <ContentType>text/plain</ContentType>
  <RefCount>1</RefCount>
  <ACL>
    <acl description="Public:All privileges to PUBLIC" xmlns="http://xmlns.oracl
e.com/xdb/acl.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:sch
emaLocation="http://xmlns.oracle.com/xdb/acl.xsd                           http:
//xmlns.oracle.com/xdb/acl.xsd">
      <ace>
        <grant>true</grant>
        <principal>PUBLIC</principal>
        <privilege>
          <all/>
        </privilege>
      </ace>
    </acl>
  </ACL>
  <Owner>SCOTT</Owner>
  <Creator>SCOTT</Creator>
  <LastModifier>SCOTT</LastModifier>
  <SchemaElement>http://xmlns.oracle.com/xdb/XDBSchema.xsd#text</SchemaElement>
  <Contents>
    <text>Mary Had a Little Lamb</text>
  </Contents>
  <VCRUID>15DE79F263F7CC00E040578C2A0656F8</VCRUID>
  <Parents>15DE79F263F8CC00E040578C2A0656F8</Parents>
  <root xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNam
espaceSchemaLocation="metadata.xsd">
    <child>
      <Child1>AAA</Child1>
      <Child2>BBB</Child2>
    </child>
  </root>
</Resource>
SQL> quit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.1.0.0.0 - Alpha
With the Partitioning and Data Mining options
I've filed bug 5313655 for the 10.2.x behavoir. If this is important to you you might want to consider signing up for the forthcoming beta program for the next release of the database