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rocksdb/db/db_iter_test.cc
Mikhail Antonov 7fe3b32896 Added support for differential snapshots 
Summary:
The motivation for this PR is to add to RocksDB support for differential (incremental) snapshots, as snapshot of the DB changes between two points in time (one can think of it as diff between to sequence numbers, or the diff D which can be thought of as an SST file or just set of KVs that can be applied to sequence number S1 to get the database to the state at sequence number S2).

This feature would be useful for various distributed storages layers built on top of RocksDB, as it should help reduce resources (time and network bandwidth) needed to recover and rebuilt DB instances as replicas in the context of distributed storages.

From the API standpoint that would like client app requesting iterator between (start seqnum) and current DB state, and reading the "diff".

This is a very draft PR for initial review in the discussion on the approach, i'm going to rework some parts and keep updating the PR.

For now, what's done here according to initial discussions:

Preserving deletes:
 - We want to be able to optionally preserve recent deletes for some defined period of time, so that if a delete came in recently and might need to be included in the next incremental snapshot it would't get dropped by a compaction. This is done by adding new param to Options (preserve deletes flag) and new variable to DB Impl where we keep track of the sequence number after which we don't want to drop tombstones, even if they are otherwise eligible for deletion.
 - I also added a new API call for clients to be able to advance this cutoff seqnum after which we drop deletes; i assume it's more flexible to let clients control this, since otherwise we'd need to keep some kind of timestamp < -- > seqnum mapping inside the DB, which sounds messy and painful to support. Clients could make use of it by periodically calling GetLatestSequenceNumber(), noting the timestamp, doing some calculation and figuring out by how much we need to advance the cutoff seqnum.
 - Compaction codepath in compaction_iterator.cc has been modified to avoid dropping tombstones with seqnum > cutoff seqnum.

Iterator changes:
 - couple params added to ReadOptions, to optionally allow client to request internal keys instead of user keys (so that client can get the latest value of a key, be it delete marker or a put), as well as min timestamp and min seqnum.

TableCache changes:
 - I modified table_cache code to be able to quickly exclude SST files from iterators heep if creation_time on the file is less then iter_start_ts as passed in ReadOptions. That would help a lot in some DB settings (like reading very recent data only or using FIFO compactions), but not so much for universal compaction with more or less long iterator time span.

What's left:

 - Still looking at how to best plug that inside DBIter codepath. So far it seems that FindNextUserKeyInternal only parses values as UserKeys, and iter->key() call generally returns user key. Can we add new API to DBIter as internal_key(), and modify this internal method to optionally set saved_key_ to point to the full internal key? I don't need to store actual seqnum there, but I do need to store type.
Closes https://github.com/facebook/rocksdb/pull/2999

Differential Revision: D6175602

Pulled By: mikhail-antonov

fbshipit-source-id: c779a6696ee2d574d86c69cec866a3ae095aa900
2017-11-01 18:56:43 -07:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include "db/db_iter.h"
#include "db/dbformat.h"
#include "rocksdb/comparator.h"
#include "rocksdb/options.h"
#include "rocksdb/perf_context.h"
#include "rocksdb/slice.h"
#include "rocksdb/statistics.h"
#include "table/iterator_wrapper.h"
#include "table/merging_iterator.h"
#include "util/string_util.h"
#include "util/sync_point.h"
#include "util/testharness.h"
#include "utilities/merge_operators.h"
namespace rocksdb {
static uint64_t TestGetTickerCount(const Options& options,
Tickers ticker_type) {
return options.statistics->getTickerCount(ticker_type);
}
class TestIterator : public InternalIterator {
public:
explicit TestIterator(const Comparator* comparator)
: initialized_(false),
valid_(false),
sequence_number_(0),
iter_(0),
cmp(comparator) {}
void AddPut(std::string argkey, std::string argvalue) {
Add(argkey, kTypeValue, argvalue);
}
void AddDeletion(std::string argkey) {
Add(argkey, kTypeDeletion, std::string());
}
void AddSingleDeletion(std::string argkey) {
Add(argkey, kTypeSingleDeletion, std::string());
}
void AddMerge(std::string argkey, std::string argvalue) {
Add(argkey, kTypeMerge, argvalue);
}
void Add(std::string argkey, ValueType type, std::string argvalue) {
Add(argkey, type, argvalue, sequence_number_++);
}
void Add(std::string argkey, ValueType type, std::string argvalue,
size_t seq_num, bool update_iter = false) {
valid_ = true;
ParsedInternalKey internal_key(argkey, seq_num, type);
data_.push_back(
std::pair<std::string, std::string>(std::string(), argvalue));
AppendInternalKey(&data_.back().first, internal_key);
if (update_iter && valid_ && cmp.Compare(data_.back().first, key()) < 0) {
// insert a key smaller than current key
Finish();
// data_[iter_] is not anymore the current element of the iterator.
// Increment it to reposition it to the right position.
iter_++;
}
}
// should be called before operations with iterator
void Finish() {
initialized_ = true;
std::sort(data_.begin(), data_.end(),
[this](std::pair<std::string, std::string> a,
std::pair<std::string, std::string> b) {
return (cmp.Compare(a.first, b.first) < 0);
});
}
virtual bool Valid() const override {
assert(initialized_);
return valid_;
}
virtual void SeekToFirst() override {
assert(initialized_);
valid_ = (data_.size() > 0);
iter_ = 0;
}
virtual void SeekToLast() override {
assert(initialized_);
valid_ = (data_.size() > 0);
iter_ = data_.size() - 1;
}
virtual void Seek(const Slice& target) override {
assert(initialized_);
SeekToFirst();
if (!valid_) {
return;
}
while (iter_ < data_.size() &&
(cmp.Compare(data_[iter_].first, target) < 0)) {
++iter_;
}
if (iter_ == data_.size()) {
valid_ = false;
}
}
virtual void SeekForPrev(const Slice& target) override {
assert(initialized_);
SeekForPrevImpl(target, &cmp);
}
virtual void Next() override {
assert(initialized_);
if (data_.empty() || (iter_ == data_.size() - 1)) {
valid_ = false;
} else {
++iter_;
}
}
virtual void Prev() override {
assert(initialized_);
if (iter_ == 0) {
valid_ = false;
} else {
--iter_;
}
}
virtual Slice key() const override {
assert(initialized_);
return data_[iter_].first;
}
virtual Slice value() const override {
assert(initialized_);
return data_[iter_].second;
}
virtual Status status() const override {
assert(initialized_);
return Status::OK();
}
virtual bool IsKeyPinned() const override { return true; }
virtual bool IsValuePinned() const override { return true; }
private:
bool initialized_;
bool valid_;
size_t sequence_number_;
size_t iter_;
InternalKeyComparator cmp;
std::vector<std::pair<std::string, std::string>> data_;
};
class DBIteratorTest : public testing::Test {
public:
Env* env_;
DBIteratorTest() : env_(Env::Default()) {}
};
TEST_F(DBIteratorTest, DBIteratorPrevNext) {
Options options;
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->Finish();
ReadOptions ro;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
}
// Test to check the SeekToLast() with iterate_upper_bound not set
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
ReadOptions ro;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
}
// Test to check the SeekToLast() with iterate_upper_bound set
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("d", "val_d");
internal_iter->AddPut("e", "val_e");
internal_iter->AddPut("f", "val_f");
internal_iter->Finish();
Slice prefix("d");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
}
// Test to check the SeekToLast() iterate_upper_bound set to a key that
// is not Put yet
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("d", "val_d");
internal_iter->Finish();
Slice prefix("z");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
}
// Test to check the SeekToLast() with iterate_upper_bound set to the
// first key
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("b", "val_b");
internal_iter->Finish();
Slice prefix("a");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(!db_iter->Valid());
}
// Test case to check SeekToLast with iterate_upper_bound set
// (same key put may times - SeekToLast should start with the
// maximum sequence id of the upper bound)
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
Slice prefix("c");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 7,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
SetPerfLevel(kEnableCount);
ASSERT_TRUE(GetPerfLevel() == kEnableCount);
get_perf_context()->Reset();
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(static_cast<int>(get_perf_context()->internal_key_skipped_count), 7);
ASSERT_EQ(db_iter->key().ToString(), "b");
SetPerfLevel(kDisable);
}
// Test to check the SeekToLast() with the iterate_upper_bound set
// (Checking the value of the key which has sequence ids greater than
// and less that the iterator's sequence id)
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a1");
internal_iter->AddPut("a", "val_a2");
internal_iter->AddPut("b", "val_b1");
internal_iter->AddPut("c", "val_c1");
internal_iter->AddPut("c", "val_c2");
internal_iter->AddPut("c", "val_c3");
internal_iter->AddPut("b", "val_b2");
internal_iter->AddPut("d", "val_d1");
internal_iter->Finish();
Slice prefix("c");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 4,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b1");
}
// Test to check the SeekToLast() with the iterate_upper_bound set to the
// key that is deleted
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
Slice prefix("a");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(!db_iter->Valid());
}
// Test to check the SeekToLast() with the iterate_upper_bound set
// (Deletion cases)
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
Slice prefix("c");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
}
// Test to check the SeekToLast() with iterate_upper_bound set
// (Deletion cases - Lot of internal keys after the upper_bound
// is deleted)
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddDeletion("c");
internal_iter->AddDeletion("d");
internal_iter->AddDeletion("e");
internal_iter->AddDeletion("f");
internal_iter->AddDeletion("g");
internal_iter->AddDeletion("h");
internal_iter->Finish();
Slice prefix("c");
ReadOptions ro;
ro.iterate_upper_bound = &prefix;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 7,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
SetPerfLevel(kEnableCount);
ASSERT_TRUE(GetPerfLevel() == kEnableCount);
get_perf_context()->Reset();
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(static_cast<int>(get_perf_context()->internal_delete_skipped_count), 1);
ASSERT_EQ(db_iter->key().ToString(), "b");
SetPerfLevel(kDisable);
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddDeletion("a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->Finish();
ReadOptions ro;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->Finish();
ReadOptions ro;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
ReadOptions ro;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val_b");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
}
}
TEST_F(DBIteratorTest, DBIteratorEmpty) {
Options options;
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
ReadOptions ro;
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 0,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 0,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(!db_iter->Valid());
}
}
TEST_F(DBIteratorTest, DBIteratorUseSkipCountSkips) {
ReadOptions ro;
Options options;
options.statistics = rocksdb::CreateDBStatistics();
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (size_t i = 0; i < 200; ++i) {
internal_iter->AddPut("a", "a");
internal_iter->AddPut("b", "b");
internal_iter->AddPut("c", "c");
}
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 2, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "c");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 1u);
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "b");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 2u);
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "a");
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 3u);
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_EQ(TestGetTickerCount(options, NUMBER_OF_RESEEKS_IN_ITERATION), 3u);
}
TEST_F(DBIteratorTest, DBIteratorUseSkip) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
{
for (size_t i = 0; i < 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("b", "merge_1");
internal_iter->AddMerge("a", "merge_2");
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddPut("c", ToString(k));
}
internal_iter->Finish();
options.statistics = rocksdb::CreateDBStatistics();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, i + 2,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), ToString(i));
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
{
for (size_t i = 0; i < 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("b", "merge_1");
internal_iter->AddMerge("a", "merge_2");
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddDeletion("c");
}
internal_iter->AddPut("c", "200");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, i + 2,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("b", "merge_1");
internal_iter->AddMerge("a", "merge_2");
for (size_t i = 0; i < 200; ++i) {
internal_iter->AddDeletion("c");
}
internal_iter->AddPut("c", "200");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 202,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "200");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
{
for (size_t i = 0; i < 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddDeletion("c");
}
internal_iter->AddPut("c", "200");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, i,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToFirst();
ASSERT_TRUE(!db_iter->Valid());
}
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (size_t i = 0; i < 200; ++i) {
internal_iter->AddDeletion("c");
}
internal_iter->AddPut("c", "200");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 200,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "200");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "200");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
}
{
for (size_t i = 0; i < 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("b", "merge_1");
internal_iter->AddMerge("a", "merge_2");
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddPut("d", ToString(k));
}
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddPut("c", ToString(k));
}
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, i + 2,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), ToString(i));
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
{
for (size_t i = 0; i < 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("b", "b");
internal_iter->AddMerge("a", "a");
for (size_t k = 0; k < 200; ++k) {
internal_iter->AddMerge("c", ToString(k));
}
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, i + 2,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
std::string merge_result = "0";
for (size_t j = 1; j <= i; ++j) {
merge_result += "," + ToString(j);
}
ASSERT_EQ(db_iter->value().ToString(), merge_result);
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "b");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "a");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
}
TEST_F(DBIteratorTest, DBIteratorSkipInternalKeys) {
Options options;
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
ReadOptions ro;
// Basic test case ... Make sure explicityly passing the default value works.
// Skipping internal keys is disabled by default, when the value is 0.
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddPut("c", "val_c");
internal_iter->AddDeletion("c");
internal_iter->AddPut("d", "val_d");
internal_iter->Finish();
ro.max_skippable_internal_keys = 0;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "val_d");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().ok());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "val_d");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().ok());
}
// Test to make sure that the request will *not* fail as incomplete if
// num_internal_keys_skipped is *equal* to max_skippable_internal_keys
// threshold. (It will fail as incomplete only when the threshold is
// exceeded.)
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().ok());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev();
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().ok());
}
// Fail the request as incomplete when num_internal_keys_skipped >
// max_skippable_internal_keys
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
// Test that the num_internal_keys_skipped counter resets after a successful
// read.
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddDeletion("d");
internal_iter->AddDeletion("d");
internal_iter->AddDeletion("d");
internal_iter->AddPut("e", "val_e");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Next(); // num_internal_keys_skipped counter resets here.
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
// Test that the num_internal_keys_skipped counter resets after a successful
// read.
// Reverse direction
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddDeletion("d");
internal_iter->AddDeletion("d");
internal_iter->AddPut("e", "val_e");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "e");
ASSERT_EQ(db_iter->value().ToString(), "val_e");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev(); // num_internal_keys_skipped counter resets here.
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
// Test that skipping separate keys is handled
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("c");
internal_iter->AddDeletion("d");
internal_iter->AddPut("e", "val_e");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "e");
ASSERT_EQ(db_iter->value().ToString(), "val_e");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
// Test if alternating puts and deletes of the same key are handled correctly.
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddPut("b", "val_b");
internal_iter->AddDeletion("b");
internal_iter->AddPut("c", "val_c");
internal_iter->AddDeletion("c");
internal_iter->AddPut("d", "val_d");
internal_iter->AddDeletion("d");
internal_iter->AddPut("e", "val_e");
internal_iter->Finish();
ro.max_skippable_internal_keys = 2;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "e");
ASSERT_EQ(db_iter->value().ToString(), "val_e");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
// Test for large number of skippable internal keys with *default*
// max_sequential_skip_in_iterations.
{
for (size_t i = 1; i <= 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
for (size_t j = 1; j <= i; ++j) {
internal_iter->AddPut("b", "val_b");
internal_iter->AddDeletion("b");
}
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
ro.max_skippable_internal_keys = i;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2 * i + 1,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
if ((options.max_sequential_skip_in_iterations + 1) >=
ro.max_skippable_internal_keys) {
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
} else {
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
}
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev();
if ((options.max_sequential_skip_in_iterations + 1) >=
ro.max_skippable_internal_keys) {
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
} else {
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
}
}
}
// Test for large number of skippable internal keys with a *non-default*
// max_sequential_skip_in_iterations.
{
for (size_t i = 1; i <= 200; ++i) {
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
for (size_t j = 1; j <= i; ++j) {
internal_iter->AddPut("b", "val_b");
internal_iter->AddDeletion("b");
}
internal_iter->AddPut("c", "val_c");
internal_iter->Finish();
options.max_sequential_skip_in_iterations = 1000;
ro.max_skippable_internal_keys = i;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2 * i + 1,
options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "val_a");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "val_c");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
ASSERT_TRUE(db_iter->status().IsIncomplete());
}
}
}
TEST_F(DBIteratorTest, DBIterator1) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("a", "1");
internal_iter->AddMerge("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 1, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
db_iter->Next();
ASSERT_FALSE(db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator2) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("a", "1");
internal_iter->AddMerge("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 0, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator3) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("a", "1");
internal_iter->AddMerge("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 2, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator4) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("a", "1");
internal_iter->AddMerge("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 4, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0,1");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "2");
db_iter->Next();
ASSERT_TRUE(!db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator5) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 0,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 1,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1,merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1,merge_2,merge_3");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 3,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "put_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 4,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "put_1,merge_4");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 5,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "put_1,merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddPut("a", "put_1");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 6,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "put_1,merge_4,merge_5,merge_6");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
// put, singledelete, merge
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "val_a");
internal_iter->AddSingleDeletion("a");
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddPut("b", "val_b");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 10,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->Seek("b");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
}
}
TEST_F(DBIteratorTest, DBIterator6) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 0,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 1,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1,merge_2");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1,merge_2,merge_3");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 3,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 4,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_4");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 5,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("a", "merge_3");
internal_iter->AddDeletion("a");
internal_iter->AddMerge("a", "merge_4");
internal_iter->AddMerge("a", "merge_5");
internal_iter->AddMerge("a", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 6,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5,merge_6");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
TEST_F(DBIteratorTest, DBIterator7) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
ImmutableCFOptions cf_options = ImmutableCFOptions(options);
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 0,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 2,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "val,merge_2");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 4,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 5,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "merge_4");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 6,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 7,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 9,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_6,merge_7");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 13,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "merge_4,merge_5");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(),
"merge_6,merge_7,merge_8,merge_9,merge_10,merge_11");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddPut("b", "val");
internal_iter->AddMerge("b", "merge_2");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("c", "merge_4");
internal_iter->AddMerge("c", "merge_5");
internal_iter->AddDeletion("b");
internal_iter->AddMerge("b", "merge_6");
internal_iter->AddMerge("b", "merge_7");
internal_iter->AddMerge("b", "merge_8");
internal_iter->AddMerge("b", "merge_9");
internal_iter->AddMerge("b", "merge_10");
internal_iter->AddMerge("b", "merge_11");
internal_iter->AddDeletion("c");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, cf_options, BytewiseComparator(), internal_iter, 14,
options.max_sequential_skip_in_iterations, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(),
"merge_6,merge_7,merge_8,merge_9,merge_10,merge_11");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1");
db_iter->Prev();
ASSERT_TRUE(!db_iter->Valid());
}
}
TEST_F(DBIteratorTest, DBIterator8) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddDeletion("a");
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "0");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0");
}
// TODO(3.13): fix the issue of Seek() then Prev() which might not necessary
// return the biggest element smaller than the seek key.
TEST_F(DBIteratorTest, DBIterator9) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
{
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddMerge("a", "merge_1");
internal_iter->AddMerge("a", "merge_2");
internal_iter->AddMerge("b", "merge_3");
internal_iter->AddMerge("b", "merge_4");
internal_iter->AddMerge("d", "merge_5");
internal_iter->AddMerge("d", "merge_6");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3,merge_4");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "merge_5,merge_6");
db_iter->Seek("b");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3,merge_4");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "merge_1,merge_2");
db_iter->SeekForPrev("b");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3,merge_4");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "merge_5,merge_6");
db_iter->Seek("c");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "merge_5,merge_6");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3,merge_4");
db_iter->SeekForPrev("c");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "merge_3,merge_4");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "merge_5,merge_6");
}
}
// TODO(3.13): fix the issue of Seek() then Prev() which might not necessary
// return the biggest element smaller than the seek key.
TEST_F(DBIteratorTest, DBIterator10) {
ReadOptions ro;
Options options;
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "1");
internal_iter->AddPut("b", "2");
internal_iter->AddPut("c", "3");
internal_iter->AddPut("d", "4");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->Seek("c");
ASSERT_TRUE(db_iter->Valid());
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "2");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "3");
db_iter->SeekForPrev("c");
ASSERT_TRUE(db_iter->Valid());
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "d");
ASSERT_EQ(db_iter->value().ToString(), "4");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "3");
}
TEST_F(DBIteratorTest, SeekToLastOccurrenceSeq0) {
ReadOptions ro;
Options options;
options.merge_operator = nullptr;
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "1");
internal_iter->AddPut("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, 0 /* force seek */, nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "1");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "2");
db_iter->Next();
ASSERT_FALSE(db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator11) {
ReadOptions ro;
Options options;
options.merge_operator = MergeOperators::CreateFromStringId("stringappend");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "0");
internal_iter->AddPut("b", "0");
internal_iter->AddSingleDeletion("b");
internal_iter->AddMerge("a", "1");
internal_iter->AddMerge("b", "2");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 1, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
db_iter->SeekToFirst();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "0");
db_iter->Next();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
db_iter->Next();
ASSERT_FALSE(db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator12) {
ReadOptions ro;
Options options;
options.merge_operator = nullptr;
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("a", "1");
internal_iter->AddPut("b", "2");
internal_iter->AddPut("c", "3");
internal_iter->AddSingleDeletion("b");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, 0, nullptr /*read_callback*/));
db_iter->SeekToLast();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "c");
ASSERT_EQ(db_iter->value().ToString(), "3");
db_iter->Prev();
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "1");
db_iter->Prev();
ASSERT_FALSE(db_iter->Valid());
}
TEST_F(DBIteratorTest, DBIterator13) {
ReadOptions ro;
Options options;
options.merge_operator = nullptr;
std::string key;
key.resize(9);
key.assign(9, static_cast<char>(0));
key[0] = 'b';
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut(key, "0");
internal_iter->AddPut(key, "1");
internal_iter->AddPut(key, "2");
internal_iter->AddPut(key, "3");
internal_iter->AddPut(key, "4");
internal_iter->AddPut(key, "5");
internal_iter->AddPut(key, "6");
internal_iter->AddPut(key, "7");
internal_iter->AddPut(key, "8");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 2, 3, nullptr /*read_callback*/));
db_iter->Seek("b");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), key);
ASSERT_EQ(db_iter->value().ToString(), "2");
}
TEST_F(DBIteratorTest, DBIterator14) {
ReadOptions ro;
Options options;
options.merge_operator = nullptr;
std::string key("b");
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddPut("b", "0");
internal_iter->AddPut("b", "1");
internal_iter->AddPut("b", "2");
internal_iter->AddPut("b", "3");
internal_iter->AddPut("a", "4");
internal_iter->AddPut("a", "5");
internal_iter->AddPut("a", "6");
internal_iter->AddPut("c", "7");
internal_iter->AddPut("c", "8");
internal_iter->AddPut("c", "9");
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 4, 1, nullptr /*read_callback*/));
db_iter->Seek("b");
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(db_iter->key().ToString(), "b");
ASSERT_EQ(db_iter->value().ToString(), "3");
db_iter->SeekToFirst();
ASSERT_EQ(db_iter->key().ToString(), "a");
ASSERT_EQ(db_iter->value().ToString(), "4");
}
TEST_F(DBIteratorTest, DBIteratorTestDifferentialSnapshots) {
{ // test that KVs earlier that iter_start_seqnum are filtered out
ReadOptions ro;
ro.iter_start_seqnum=5;
Options options;
options.statistics = rocksdb::CreateDBStatistics();
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (size_t i = 0; i < 10; ++i) {
internal_iter->AddPut(std::to_string(i), std::to_string(i) + "a");
internal_iter->AddPut(std::to_string(i), std::to_string(i) + "b");
internal_iter->AddPut(std::to_string(i), std::to_string(i) + "c");
}
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 13,
options.max_sequential_skip_in_iterations, nullptr));
// Expecting InternalKeys in [5,8] range with correct type
int seqnums[4] = {5,8,11,13};
std::string user_keys[4] = {"1","2","3","4"};
std::string values[4] = {"1c", "2c", "3c", "4b"};
int i = 0;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
FullKey fkey;
ParseFullKey(db_iter->key(), &fkey);
ASSERT_EQ(user_keys[i], fkey.user_key.ToString());
ASSERT_EQ(EntryType::kEntryPut, fkey.type);
ASSERT_EQ(seqnums[i], fkey.sequence);
ASSERT_EQ(values[i], db_iter->value().ToString());
i++;
}
ASSERT_EQ(i, 4);
}
{ // Test that deletes are returned correctly as internal KVs
ReadOptions ro;
ro.iter_start_seqnum=5;
Options options;
options.statistics = rocksdb::CreateDBStatistics();
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (size_t i = 0; i < 10; ++i) {
internal_iter->AddPut(std::to_string(i), std::to_string(i) + "a");
internal_iter->AddPut(std::to_string(i), std::to_string(i) + "b");
internal_iter->AddDeletion(std::to_string(i));
}
internal_iter->Finish();
std::unique_ptr<Iterator> db_iter(
NewDBIterator(env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 13,
options.max_sequential_skip_in_iterations, nullptr));
// Expecting InternalKeys in [5,8] range with correct type
int seqnums[4] = {5,8,11,13};
EntryType key_types[4] = {EntryType::kEntryDelete,EntryType::kEntryDelete,
EntryType::kEntryDelete,EntryType::kEntryPut};
std::string user_keys[4] = {"1","2","3","4"};
std::string values[4] = {"", "", "", "4b"};
int i = 0;
for (db_iter->SeekToFirst(); db_iter->Valid(); db_iter->Next()) {
FullKey fkey;
ParseFullKey(db_iter->key(), &fkey);
ASSERT_EQ(user_keys[i], fkey.user_key.ToString());
ASSERT_EQ(key_types[i], fkey.type);
ASSERT_EQ(seqnums[i], fkey.sequence);
ASSERT_EQ(values[i], db_iter->value().ToString());
i++;
}
ASSERT_EQ(i, 4);
}
}
class DBIterWithMergeIterTest : public testing::Test {
public:
DBIterWithMergeIterTest()
: env_(Env::Default()), icomp_(BytewiseComparator()) {
options_.merge_operator = nullptr;
internal_iter1_ = new TestIterator(BytewiseComparator());
internal_iter1_->Add("a", kTypeValue, "1", 3u);
internal_iter1_->Add("f", kTypeValue, "2", 5u);
internal_iter1_->Add("g", kTypeValue, "3", 7u);
internal_iter1_->Finish();
internal_iter2_ = new TestIterator(BytewiseComparator());
internal_iter2_->Add("a", kTypeValue, "4", 6u);
internal_iter2_->Add("b", kTypeValue, "5", 1u);
internal_iter2_->Add("c", kTypeValue, "6", 2u);
internal_iter2_->Add("d", kTypeValue, "7", 3u);
internal_iter2_->Finish();
std::vector<InternalIterator*> child_iters;
child_iters.push_back(internal_iter1_);
child_iters.push_back(internal_iter2_);
InternalKeyComparator icomp(BytewiseComparator());
InternalIterator* merge_iter =
NewMergingIterator(&icomp_, &child_iters[0], 2u);
db_iter_.reset(NewDBIterator(
env_, ro_, ImmutableCFOptions(options_), BytewiseComparator(),
merge_iter, 8 /* read data earlier than seqId 8 */,
3 /* max iterators before reseek */, nullptr /*read_callback*/));
}
Env* env_;
ReadOptions ro_;
Options options_;
TestIterator* internal_iter1_;
TestIterator* internal_iter2_;
InternalKeyComparator icomp_;
Iterator* merge_iter_;
std::unique_ptr<Iterator> db_iter_;
};
TEST_F(DBIterWithMergeIterTest, InnerMergeIterator1) {
db_iter_->SeekToFirst();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
db_iter_->Next();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Next();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Next();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Next();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Next();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
db_iter_->Next();
ASSERT_FALSE(db_iter_->Valid());
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIterator2) {
// Test Prev() when one child iterator is at its end.
db_iter_->SeekForPrev("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace1) {
// Test Prev() when one child iterator is at its end but more rows
// are added.
db_iter_->Seek("f");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
// Test call back inserts a key in the end of the mem table after
// MergeIterator::Prev() realized the mem table iterator is at its end
// and before an SeekToLast() is called.
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforeSeekToLast",
[&](void* arg) { internal_iter2_->Add("z", kTypeValue, "7", 12u); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace2) {
// Test Prev() when one child iterator is at its end but more rows
// are added.
db_iter_->Seek("f");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
// Test call back inserts entries for update a key in the end of the
// mem table after MergeIterator::Prev() realized the mem tableiterator is at
// its end and before an SeekToLast() is called.
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforeSeekToLast", [&](void* arg) {
internal_iter2_->Add("z", kTypeValue, "7", 12u);
internal_iter2_->Add("z", kTypeValue, "7", 11u);
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace3) {
// Test Prev() when one child iterator is at its end but more rows
// are added and max_skipped is triggered.
db_iter_->Seek("f");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
// Test call back inserts entries for update a key in the end of the
// mem table after MergeIterator::Prev() realized the mem table iterator is at
// its end and before an SeekToLast() is called.
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforeSeekToLast", [&](void* arg) {
internal_iter2_->Add("z", kTypeValue, "7", 16u, true);
internal_iter2_->Add("z", kTypeValue, "7", 15u, true);
internal_iter2_->Add("z", kTypeValue, "7", 14u, true);
internal_iter2_->Add("z", kTypeValue, "7", 13u, true);
internal_iter2_->Add("z", kTypeValue, "7", 12u, true);
internal_iter2_->Add("z", kTypeValue, "7", 11u, true);
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace4) {
// Test Prev() when one child iterator has more rows inserted
// between Seek() and Prev() when changing directions.
internal_iter2_->Add("z", kTypeValue, "9", 4u);
db_iter_->Seek("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
// Test call back inserts entries for update a key before "z" in
// mem table after MergeIterator::Prev() calls mem table iterator's
// Seek() and before calling Prev()
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforePrev", [&](void* arg) {
IteratorWrapper* it = reinterpret_cast<IteratorWrapper*>(arg);
if (it->key().starts_with("z")) {
internal_iter2_->Add("x", kTypeValue, "7", 16u, true);
internal_iter2_->Add("x", kTypeValue, "7", 15u, true);
internal_iter2_->Add("x", kTypeValue, "7", 14u, true);
internal_iter2_->Add("x", kTypeValue, "7", 13u, true);
internal_iter2_->Add("x", kTypeValue, "7", 12u, true);
internal_iter2_->Add("x", kTypeValue, "7", 11u, true);
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace5) {
internal_iter2_->Add("z", kTypeValue, "9", 4u);
// Test Prev() when one child iterator has more rows inserted
// between Seek() and Prev() when changing directions.
db_iter_->Seek("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
// Test call back inserts entries for update a key before "z" in
// mem table after MergeIterator::Prev() calls mem table iterator's
// Seek() and before calling Prev()
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforePrev", [&](void* arg) {
IteratorWrapper* it = reinterpret_cast<IteratorWrapper*>(arg);
if (it->key().starts_with("z")) {
internal_iter2_->Add("x", kTypeValue, "7", 16u, true);
internal_iter2_->Add("x", kTypeValue, "7", 15u, true);
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace6) {
internal_iter2_->Add("z", kTypeValue, "9", 4u);
// Test Prev() when one child iterator has more rows inserted
// between Seek() and Prev() when changing directions.
db_iter_->Seek("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
// Test call back inserts an entry for update a key before "z" in
// mem table after MergeIterator::Prev() calls mem table iterator's
// Seek() and before calling Prev()
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforePrev", [&](void* arg) {
IteratorWrapper* it = reinterpret_cast<IteratorWrapper*>(arg);
if (it->key().starts_with("z")) {
internal_iter2_->Add("x", kTypeValue, "7", 16u, true);
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace7) {
internal_iter1_->Add("u", kTypeValue, "10", 4u);
internal_iter1_->Add("v", kTypeValue, "11", 4u);
internal_iter1_->Add("w", kTypeValue, "12", 4u);
internal_iter2_->Add("z", kTypeValue, "9", 4u);
// Test Prev() when one child iterator has more rows inserted
// between Seek() and Prev() when changing directions.
db_iter_->Seek("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
// Test call back inserts entries for update a key before "z" in
// mem table after MergeIterator::Prev() calls mem table iterator's
// Seek() and before calling Prev()
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforePrev", [&](void* arg) {
IteratorWrapper* it = reinterpret_cast<IteratorWrapper*>(arg);
if (it->key().starts_with("z")) {
internal_iter2_->Add("x", kTypeValue, "7", 16u, true);
internal_iter2_->Add("x", kTypeValue, "7", 15u, true);
internal_iter2_->Add("x", kTypeValue, "7", 14u, true);
internal_iter2_->Add("x", kTypeValue, "7", 13u, true);
internal_iter2_->Add("x", kTypeValue, "7", 12u, true);
internal_iter2_->Add("x", kTypeValue, "7", 11u, true);
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "c");
ASSERT_EQ(db_iter_->value().ToString(), "6");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "b");
ASSERT_EQ(db_iter_->value().ToString(), "5");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "a");
ASSERT_EQ(db_iter_->value().ToString(), "4");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIterWithMergeIterTest, InnerMergeIteratorDataRace8) {
// internal_iter1_: a, f, g
// internal_iter2_: a, b, c, d, adding (z)
internal_iter2_->Add("z", kTypeValue, "9", 4u);
// Test Prev() when one child iterator has more rows inserted
// between Seek() and Prev() when changing directions.
db_iter_->Seek("g");
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "g");
ASSERT_EQ(db_iter_->value().ToString(), "3");
// Test call back inserts two keys before "z" in mem table after
// MergeIterator::Prev() calls mem table iterator's Seek() and
// before calling Prev()
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"MergeIterator::Prev:BeforePrev", [&](void* arg) {
IteratorWrapper* it = reinterpret_cast<IteratorWrapper*>(arg);
if (it->key().starts_with("z")) {
internal_iter2_->Add("x", kTypeValue, "7", 16u, true);
internal_iter2_->Add("y", kTypeValue, "7", 17u, true);
}
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "f");
ASSERT_EQ(db_iter_->value().ToString(), "2");
db_iter_->Prev();
ASSERT_TRUE(db_iter_->Valid());
ASSERT_EQ(db_iter_->key().ToString(), "d");
ASSERT_EQ(db_iter_->value().ToString(), "7");
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
}
TEST_F(DBIteratorTest, SeekPrefixTombstones) {
ReadOptions ro;
Options options;
options.prefix_extractor.reset(NewNoopTransform());
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
internal_iter->AddDeletion("b");
internal_iter->AddDeletion("c");
internal_iter->AddDeletion("d");
internal_iter->AddDeletion("e");
internal_iter->AddDeletion("f");
internal_iter->AddDeletion("g");
internal_iter->Finish();
ro.prefix_same_as_start = true;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10, options.max_sequential_skip_in_iterations,
nullptr /*read_callback*/));
int skipped_keys = 0;
get_perf_context()->Reset();
db_iter->SeekForPrev("z");
skipped_keys =
static_cast<int>(get_perf_context()->internal_key_skipped_count);
ASSERT_EQ(skipped_keys, 0);
get_perf_context()->Reset();
db_iter->Seek("a");
skipped_keys =
static_cast<int>(get_perf_context()->internal_key_skipped_count);
ASSERT_EQ(skipped_keys, 0);
}
TEST_F(DBIteratorTest, SeekToFirstLowerBound) {
const int kNumKeys = 3;
for (int i = 0; i < kNumKeys + 2; ++i) {
// + 2 for two special cases: lower bound before and lower bound after the
// internal iterator's keys
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (int j = 1; j <= kNumKeys; ++j) {
internal_iter->AddPut(std::to_string(j), "val");
}
internal_iter->Finish();
ReadOptions ro;
auto lower_bound_str = std::to_string(i);
Slice lower_bound(lower_bound_str);
ro.iterate_lower_bound = &lower_bound;
Options options;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10 /* sequence */,
options.max_sequential_skip_in_iterations, nullptr /* read_callback */));
db_iter->SeekToFirst();
if (i == kNumKeys + 1) {
// lower bound was beyond the last key
ASSERT_FALSE(db_iter->Valid());
} else {
ASSERT_TRUE(db_iter->Valid());
int expected;
if (i == 0) {
// lower bound was before the first key
expected = 1;
} else {
// lower bound was at the ith key
expected = i;
}
ASSERT_EQ(std::to_string(expected), db_iter->key().ToString());
}
}
}
TEST_F(DBIteratorTest, PrevLowerBound) {
const int kNumKeys = 3;
const int kLowerBound = 2;
TestIterator* internal_iter = new TestIterator(BytewiseComparator());
for (int j = 1; j <= kNumKeys; ++j) {
internal_iter->AddPut(std::to_string(j), "val");
}
internal_iter->Finish();
ReadOptions ro;
auto lower_bound_str = std::to_string(kLowerBound);
Slice lower_bound(lower_bound_str);
ro.iterate_lower_bound = &lower_bound;
Options options;
std::unique_ptr<Iterator> db_iter(NewDBIterator(
env_, ro, ImmutableCFOptions(options), BytewiseComparator(),
internal_iter, 10 /* sequence */,
options.max_sequential_skip_in_iterations, nullptr /* read_callback */));
db_iter->SeekToLast();
for (int i = kNumKeys; i >= kLowerBound; --i) {
ASSERT_TRUE(db_iter->Valid());
ASSERT_EQ(std::to_string(i), db_iter->key().ToString());
db_iter->Prev();
}
ASSERT_FALSE(db_iter->Valid());
}
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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