ORA-22809 when executing sample source code for purchaseOrder.xsd

Question

Hello,
i was trying to execute the sample code given in chapter 5 of Oracle XML DB User's Guide for version 10GR2 (on an Oracle XE db) and i got:
Error starting at line 1 in command:
CREATE TABLE purchaseorder_as_column (
id NUMBER,
xml_document XMLType,
UNIQUE (xml_document."XMLDATA"."Reference"))
XMLTYPE COLUMN xml_document
XMLSCHEMA "http://xmlns.oracle.com/xdb/documentation/purchaseOrder.xsd"
ELEMENT "PurchaseOrder"
VARRAY xml_document."XMLDATA"."Actions"."Action"
STORE AS TABLE action_table2
((PRIMARY KEY (NESTED_TABLE_ID, SYS_NC_ARRAY_INDEX$))
ORGANIZATION INDEX OVERFLOW)
VARRAY xml_document."XMLDATA"."LineItems"."LineItem"
STORE AS TABLE lineitem_table2
((PRIMARY KEY (NESTED_TABLE_ID, SYS_NC_ARRAY_INDEX$))
ORGANIZATION INDEX OVERFLOW)
LOB (xml_document."XMLDATA"."Notes")
STORE AS (TABLESPACE USERS ENABLE STORAGE IN ROW
STORAGE(INITIAL 4K NEXT 32K))
Error at Command Line:12 Column:32
Error report:
SQL Error: ORA-22809: nonexistent attribute
22809. 00000 - "nonexistent attribute"
*Cause:    An attempt was made to access a non-existent attribute of an
object type.
*Action:   Check the attribute reference to see if it is valid. Then retry
the operation.
The purchaseOrder.xsd schema document has been built by cutting and pasting the various fragments contained in the documentation and can be found at:
http://www.yocoya.com/temp/purchaseOrder.xsd
The schema was registered using the following command:
BEGIN
DBMS_XMLSCHEMA.registerSchema(
SCHEMAURL => 'http://xmlns.oracle.com/xdb/documentation/purchaseOrder.xsd',
SCHEMADOC => bfilename('XMLDIR','purchaseOrder.xsd'),
CSID => nls_charset_id('AL32UTF8'),
LOCAL => TRUE,
GENTYPES => TRUE,
GENTABLES => TRUE);
END;
Can someone explain what i am doing wrong or tell if the sample code is flawed?
Thank you,
Flavio
http://www.oraclequirks.com

Answer 1

Just to close this thread, in the sample xml schema document i linked in my original post, there were some xdb:SQLName annotations against elements LineItems, LineItem, Actions and Action. When such annotations are present, column names and object attributes that would otherwise carry the same name as the xml elements/attributes are completely replaced by the specified strings. This is necessary if, for some reason, the element name contain reserved oracle words (i also hit this problem 15 minutes after resolving my original issue...) or simply because we don't like having case sensitive names.
In my original CREATE TABLE statement i was attempting to refer to nested elements using the original case sensitive names, but these names had been replaced by LINEITEMS, LINEITEM, ACTIONS and ACTION (in uppercase), hence ORA-22809.
This was not the only problem afflicting my custom purchaseOrder.xsd, but it was the reason of ORA-22809.
Eventually I managed to get the custom purchaseOrder schema to work.
May be i'll come up with some tongue-in-cheek tutorial on my blog one day or another.
Bye,
Flavio
http://www.oraclequirks.com