mirror of https://github.com/facebook/rocksdb.git
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
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// Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#pragma once
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#include <map>
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#include <string>
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#include <vector>
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#include "db/dbformat.h"
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#include "db/pinned_iterators_manager.h"
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#include "db/version_edit.h"
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#include "include/rocksdb/comparator.h"
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#include "include/rocksdb/types.h"
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#include "table/internal_iterator.h"
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#include "table/scoped_arena_iterator.h"
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#include "table/table_builder.h"
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#include "util/kv_map.h"
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namespace rocksdb {
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class RangeDelAggregator {
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public:
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RangeDelAggregator(const InternalKeyComparator& icmp,
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const std::vector<SequenceNumber>& snapshots);
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bool ShouldDelete(const Slice& internal_key, bool for_compaction = false);
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bool ShouldAddTombstones(bool bottommost_level = false);
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void AddTombstones(ScopedArenaIterator input);
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void AddTombstones(std::unique_ptr<InternalIterator> input);
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// write tombstones covering a range to a table builder
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// usually don't add to a max-level table builder
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void AddToBuilder(TableBuilder* builder, bool extend_before_min_key,
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const Slice* next_table_min_key, FileMetaData* meta,
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bool bottommost_level = false);
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private:
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// Maps tombstone start key -> tombstone object
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typedef std::map<std::string, RangeTombstone, stl_wrappers::LessOfComparator>
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TombstoneMap;
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// Maps snapshot seqnum -> map of tombstones that fall in that stripe, i.e.,
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// their seqnums are greater than the next smaller snapshot's seqnum.
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typedef std::map<SequenceNumber, TombstoneMap> StripeMap;
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void AddTombstones(InternalIterator* input, bool arena);
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StripeMap::iterator GetStripeMapIter(SequenceNumber seq);
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PinnedIteratorsManager pinned_iters_mgr_;
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StripeMap stripe_map_;
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const InternalKeyComparator icmp_;
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};
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} // namespace rocksdb
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