ORA-02015：cannot select FOR UPDATE from remote table
错误码
错误描述：cannot select FOR UPDATE from remote table
错误原因：An attempt was made to select FOR UPDATE on a remote table (directly, or via a view) that had abstract data type columns, and the view or select list contained abstract data type columns or non-column items.
解决方法：To attempt a select FOR UPDATE, use a view or select list that consists only of base columns from the remote table, none of which may be abstract data type columns.
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