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