XML Syntax - DELETE Statement
The DELETE statement in XML syntax deletes an XML element and all
sub-elements from the in-memory representation of an XML document.
Format

Syntax Rules:
- File-name-1 is the filename as declared in the SELECT statement
with ORGANIZATION IS XML.
- Data-name-1 can be qualified, and references a data item whose
declaration includes an IDENTIFIED BY clause and is included in the XD record
declarations for file-name-1.
General Rules:
- When you specify DELETE KEY IS, this deletes the internal
representation of the elements and child elements associated with data-name-1.
All other elements represented in the record remain unchanged.
- No stream I/O is actually performed by the DELETE statement.
- If the internal representation of the XML document is modified
through the use of WRITE KEY, REWRITE KEY, or DELETE KEY, and the internal
representation is cleared with either a CLOSE or READ (no key) statement, then
the CLOSE or READ statement will return a status of -10, indicating the
operation succeeded but no write was done.