But you receive a NullPointerException, because the current row no longer exists - it was modified, and the changes aren't visible in the current cursor.
但是将会收到NullPointerException，因为当前行已不存在——它已被修改，并且更改在当前的游标中不可见。
The row set uses integrated indexes and there is no current index.
行集使用了集成索引，但没有当前索引。
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