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bool is_rmw() const
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< p > Get DB_RMW setting. < / p >
< p > Return true if the iterator's cursor has DB_RMW flag set, false otherwise. DB_RMW flag causes a write lock to be acquired when reading a key/data pair, so that the transaction won't block later when writing back the updated value in a read-modify-write operation cycle. < / p >
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