mirror of
https://github.com/facebook/rocksdb.git
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f515d9d203
Summary:
This reverts commit f02c708aa3 since it introduced several bugs (see https://github.com/facebook/rocksdb/issues/11078 and https://github.com/facebook/rocksdb/issues/11067 for attempts to fix them) and that I do not have a high confidence to fix all of them and ensure no further ones before the next release branch cut. There are also come existing issue found during bug fixing. We will work on it and try to merge it to the release after.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/11089
Test Plan: existing CI.
Reviewed By: ajkr
Differential Revision: D42505972
Pulled By: cbi42
fbshipit-source-id: 2f66dcde6b85dc94977b317c2ce513872cfbc153
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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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 "rocksdb/iterator.h"
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#include "rocksdb/slice.h"
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#include "table/internal_iterator.h"
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namespace ROCKSDB_NAMESPACE {
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class HistoryTrimmingIterator : public InternalIterator {
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public:
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explicit HistoryTrimmingIterator(InternalIterator* input,
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const Comparator* cmp, const std::string& ts)
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: input_(input), filter_ts_(ts), cmp_(cmp) {
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assert(cmp_->timestamp_size() > 0 && !ts.empty());
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}
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bool filter() const {
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if (!input_->Valid()) {
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return true;
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}
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Slice current_ts = ExtractTimestampFromKey(key(), cmp_->timestamp_size());
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return cmp_->CompareTimestamp(current_ts, Slice(filter_ts_)) <= 0;
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}
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bool Valid() const override { return input_->Valid(); }
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void SeekToFirst() override {
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input_->SeekToFirst();
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while (!filter()) {
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input_->Next();
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}
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}
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void SeekToLast() override {
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input_->SeekToLast();
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while (!filter()) {
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input_->Prev();
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}
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}
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void Seek(const Slice& target) override {
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input_->Seek(target);
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while (!filter()) {
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input_->Next();
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}
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}
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void SeekForPrev(const Slice& target) override {
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input_->SeekForPrev(target);
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while (!filter()) {
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input_->Prev();
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}
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}
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void Next() override {
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do {
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input_->Next();
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} while (!filter());
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}
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void Prev() override {
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do {
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input_->Prev();
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} while (!filter());
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}
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Slice key() const override { return input_->key(); }
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Slice value() const override { return input_->value(); }
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Status status() const override { return input_->status(); }
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bool IsKeyPinned() const override { return input_->IsKeyPinned(); }
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bool IsValuePinned() const override { return input_->IsValuePinned(); }
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private:
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InternalIterator* input_;
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const std::string filter_ts_;
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const Comparator* const cmp_;
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};
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} // namespace ROCKSDB_NAMESPACE
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