Issue with extracting node values of an XMLElement with multiple namespaces

Question

I have created a Table with XMLType Column
CREATE TABLE xmlNode
( ID numeric(10) primary key,
DATA XMLType);
Then inserted one row
INSERT INTO xmlNode(ID, DATA) VALUES(1, '<lineItemElement orderLineItemID="12323" transactionType="New" xmlns="http://rcss.bell.ca/schema/lineitemmessages">
<rcss:catalogeID xmlns:rcss="http://rcss.bell.ca/schema/PartnerBatch">3234</rcss:catalogeID>
<rcss:venueID xmlns:rcss="http://rcss.bell.ca/schema/PartnerBatch">345345</rcss:venueID>
<rcss:startDate xmlns:rcss="http://rcss.bell.ca/schema/PartnerBatch">2007-09-10T00:00:00Z</rcss:startDate>
<rcss:endDate xmlns:rcss="http://rcss.bell.ca/schema/PartnerBatch">2007-09-10T00:00:00Z</rcss:endDate>
<rcss:contact contactID="234234" xmlns:rcss="http://rcss.bell.ca/schema/PartnerBatch">
<rcss:address>
<rcss:streetAddress1>?asdsd</rcss:streetAddress1>
<rcss:streetAddress2>?sdss</rcss:streetAddress2>
<rcss:city>?ddf</rcss:city>
<rcss:province>?sdcfsdcf</rcss:province>
<rcss:country>sds</rcss:country>
<rcss:postalCode>1121332</rcss:postalCode>
</rcss:address>
</rcss:contact>
</lineItemElement>')
Then i ran:
SELECT
extractValue(data,'/lineItemElement/rcss:catalogeID','xmlns=http://rcss.bell.ca/schema/lineitemmessages, xmlns:rcss=http://rcss.bell.ca/schema/PartnerBatch')
from xml where id=1
There is nothing returned.
Please advise how could I get the node value when there is namespace?
I know how to extract values if there is one namespace but i'm not able to extract values if there are two namespaces.
Any help is appreciable!!
Thanks in Advance.

Answer 1

I fixed that problem too. What I thought was a singleton was actually a repeating element. I needed to be able to "multiply" the repeating node for the main node, but I couldn't find a concise way of doing this in SQL. So instead I did it in with two loops.
FOR rec IN (
SELECT
     extractvalue(value(e), 'surchargeEntry/company',p_namespace) company
     ,extractvalue(value(e), 'surchargeEntry/surchargeType',p_namespace) surcharge_type
     ,extractvalue(value(e), 'surchargeEntry/shortDescription',p_namespace) short_description
     ,extractvalue(value(e), 'surchargeEntry/longDescription',p_namespace) long_description
     ,e.column_value surcharge_entry_xml
     FROM TABLE(xmlsequence(extract(p_xml, 'surchargeInquiryResponse' ||
     '/surchargeAttributes/surchargeEntry'
                                                                                ,p_namespace))) e
) LOOP
FOR rec_country IN (
SELECT
     extractvalue(value(c), 'country/originationCountry',p_namespace) origination_country
     ,extractvalue(value(c), 'country/destinationCountry',p_namespace) destination_country
     FROM TABLE(xmlsequence(extract(rec.surcharge_entry_xml, 'surchargeEntry/country',p_namespace))) c
LOOP
nafta_fee_obj.append_surcharge_entry_data(
          v_arr
          ,r_surcharge_entry(
          rec.company
          ,rec.surcharge_type
          ,rec.short_description
          ,rec.long_description
          ,rec_country.origination_country
          ,rec_country.destination_country
END LOOP;
END LOOP;
I populate a collection, which is easy to pass around between routines. I can easily convert the collection to a ref cursor, and index-by array, comma-delimited string, etc.
Apparently, the namespace is required in SQL, but not in staright PL/SQL.
I've also noticed that the docs say xmltype() has all these member functions, but when I try to use some of them, I get an error that it's undefined. Like getNumVal(). There are some functions I can use in SQL, or PL/SQL, but not vice-versa.
- Dan Clamage