27 lines
867 B
C
27 lines
867 B
C
|
// 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.
|
||
|
|
|
||
|
|
#ifndef STORAGE_LEVELDB_TABLE_MERGER_H_
|
||
|
|
#define STORAGE_LEVELDB_TABLE_MERGER_H_
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
} // namespace leveldb
|
||
|
|
|
||
|
|
#endif // STORAGE_LEVELDB_TABLE_MERGER_H_
|