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Hi,
There is an existing approach to get this to work. You do NOT need to change the data model in order to support XMLTABLE, but rather modify the XMLTABLE invocation.
Wrap the CLOB with an XMLPARSE function as shown in the following side by side comparisons below.
set schema slrxmlsamp;
CALL QSYS.CREATE_XML_SAMPLE ('SLRXMLSAMP');
SELECT U."PO ID", U."Part #", U."Product Name",
U."Quantity", U."Price", U."Order Date"
FROM PURCHASEORDER P,
XMLTABLE('$po/PurchaseOrder/item' PASSING P.PORDER AS "po"
COLUMNS "PO ID" INTEGER PATH '../@PoNum',
"Part #" CHAR(10) PATH 'partid',
"Product Name" VARCHAR(50) PATH 'name',
"Quantity" INTEGER PATH 'quantity',
"Price" DECIMAL(9,2) PATH 'price',
"Order Date" DATE PATH '../@OrderDate'
) AS U
WHERE P.STATUS = 'Unshipped';
create table qtemp.newtab(porder) as (
select xmlserialize(porder as clob(1000)) from purchaseorder) with data; -- clob version of the xml document
-- Note the use of XMLPARSE...
SELECT *
FROM qtemp.newtab P,
XMLTABLE('$po/PurchaseOrder/item' PASSING xmlparse(document P.PORDER) AS "po"
COLUMNS "PO ID" INTEGER PATH '../@PoNum',
"Part #" CHAR(10) PATH 'partid',
"Product Name" VARCHAR(50) PATH 'name',
"Quantity" INTEGER PATH 'quantity',
"Price" DECIMAL(9,2) PATH 'price',
"Order Date" DATE PATH '../@OrderDate'
) AS U
;