"The MERGE INTO syntax does not support the security policy."
*Cause: The MERGE INTO syntax did not support a security policy on the
destination table, because the policy's statement_types did
not include each of INSERT, UPDATE and DELETE.
*Action: If you do not have the privilege to modify the security policy,
then instead of MERGE INTO, use the INSERT, UPDATE and DELETE DML
statements on the table that has a security policy defined on it.
If you have the privilege to modify the security policy, then
redefine it in such a way that statement_types includes all of
the DML statement types (INSERT, UPDATE and DELETE).