Oracle Error ORA-18120: XUDY0021 – The result XDM instance violates XDM constraints

Oracle Error Message

ORA-18120: XUDY0021 – The result XDM instance violates XDM constraints

Reason for the Error

XDM instance resulting from applying all the updates in a query violated constraint specified in [XQuery/XPath Data Model (XDM)]. In this case, none of the updates in the query were made effective.

Solution

None

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