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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
namespace leveldb {
class Comparator;
class Iterator;
// Return an iterator that provided the union of the data in
// children[0,n-1]. Takes ownership of the child iterators and
// will delete them when the result iterator is deleted.
// The result does no duplicate suppression. I.e., if a particular
// key is present in K child iterators, it will be yielded K times.
// REQUIRES: n >= 0
extern Iterator* NewMergingIterator(
const Comparator* comparator, Iterator** children, int n);