fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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488 lines
18 KiB
488 lines
18 KiB
// Copyright (c) 2018-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "db/db_test_util.h"
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#include "port/stack_trace.h"
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#include "rocksdb/perf_context.h"
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#include "rocksdb/utilities/debug.h"
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#include "table/block_based/block_builder.h"
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#include "test_util/sync_point.h"
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#include "rocksdb/merge_operator.h"
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#include "utilities/fault_injection_env.h"
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#include "utilities/merge_operators.h"
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#include "utilities/merge_operators/sortlist.h"
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#include "utilities/merge_operators/string_append/stringappend2.h"
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namespace ROCKSDB_NAMESPACE {
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namespace {
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class LimitedStringAppendMergeOp : public StringAppendTESTOperator {
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public:
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LimitedStringAppendMergeOp(int limit, char delim)
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: StringAppendTESTOperator(delim), limit_(limit) {}
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const char* Name() const override {
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return "DBMergeOperatorTest::LimitedStringAppendMergeOp";
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}
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bool ShouldMerge(const std::vector<Slice>& operands) const override {
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if (operands.size() > 0 && limit_ > 0 && operands.size() >= limit_) {
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return true;
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}
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return false;
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}
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private:
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size_t limit_ = 0;
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};
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} // anonymous namespace
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class DBMergeOperandTest : public DBTestBase {
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public:
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DBMergeOperandTest()
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: DBTestBase("db_merge_operand_test", /*env_do_fsync=*/true) {}
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};
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TEST_F(DBMergeOperandTest, CacheEvictedMergeOperandReadAfterFreeBug) {
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// There was a bug of reading merge operands after they are mistakely freed
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// in DB::GetMergeOperands, which is surfaced by cache full.
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// See PR#9507 for more.
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Options options;
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options.create_if_missing = true;
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options.merge_operator = MergeOperators::CreateStringAppendOperator();
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options.env = env_;
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BlockBasedTableOptions table_options;
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// Small cache to simulate cache full
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table_options.block_cache = NewLRUCache(1);
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options.table_factory.reset(NewBlockBasedTableFactory(table_options));
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Reopen(options);
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int num_records = 4;
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int number_of_operands = 0;
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std::vector<PinnableSlice> values(num_records);
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GetMergeOperandsOptions merge_operands_info;
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merge_operands_info.expected_max_number_of_operands = num_records;
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ASSERT_OK(Merge("k1", "v1"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k1", "v2"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k1", "v3"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k1", "v4"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(number_of_operands, 4);
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ASSERT_EQ(values[0].ToString(), "v1");
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ASSERT_EQ(values[1].ToString(), "v2");
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ASSERT_EQ(values[2].ToString(), "v3");
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ASSERT_EQ(values[3].ToString(), "v4");
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}
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TEST_F(DBMergeOperandTest, FlushedMergeOperandReadAfterFreeBug) {
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// Repro for a bug where a memtable containing a merge operand could be
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// deleted before the merge operand was saved to the result.
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auto options = CurrentOptions();
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options.merge_operator = MergeOperators::CreateStringAppendOperator();
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Reopen(options);
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ASSERT_OK(Merge("key", "value"));
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ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
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{{"DBImpl::GetImpl:PostMemTableGet:0",
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"DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PreFlush"},
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{"DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PostFlush",
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"DBImpl::GetImpl:PostMemTableGet:1"}});
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ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
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auto flush_thread = port::Thread([&]() {
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TEST_SYNC_POINT(
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"DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PreFlush");
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ASSERT_OK(Flush());
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TEST_SYNC_POINT(
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"DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PostFlush");
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});
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PinnableSlice value;
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GetMergeOperandsOptions merge_operands_info;
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merge_operands_info.expected_max_number_of_operands = 1;
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int number_of_operands;
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"key", &value, &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(1, number_of_operands);
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flush_thread.join();
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}
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TEST_F(DBMergeOperandTest, GetMergeOperandsBasic) {
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Options options;
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options.create_if_missing = true;
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// Use only the latest two merge operands.
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options.merge_operator = std::make_shared<LimitedStringAppendMergeOp>(2, ',');
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options.env = env_;
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Reopen(options);
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int num_records = 4;
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int number_of_operands = 0;
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std::vector<PinnableSlice> values(num_records);
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GetMergeOperandsOptions merge_operands_info;
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merge_operands_info.expected_max_number_of_operands = num_records;
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// k0 value in memtable
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ASSERT_OK(Put("k0", "PutARock"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k0", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "PutARock");
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// k0.1 value in SST
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ASSERT_OK(Put("k0.1", "RockInSST"));
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ASSERT_OK(Flush());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k0.1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "RockInSST");
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// All k1 values are in memtable.
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ASSERT_OK(Merge("k1", "a"));
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ASSERT_OK(Put("k1", "x"));
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ASSERT_OK(Merge("k1", "b"));
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ASSERT_OK(Merge("k1", "c"));
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ASSERT_OK(Merge("k1", "d"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "x");
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ASSERT_EQ(values[1], "b");
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ASSERT_EQ(values[2], "c");
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ASSERT_EQ(values[3], "d");
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// expected_max_number_of_operands is less than number of merge operands so
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// status should be Incomplete.
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merge_operands_info.expected_max_number_of_operands = num_records - 1;
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Status status = db_->GetMergeOperands(
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ReadOptions(), db_->DefaultColumnFamily(), "k1", values.data(),
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&merge_operands_info, &number_of_operands);
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ASSERT_EQ(status.IsIncomplete(), true);
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merge_operands_info.expected_max_number_of_operands = num_records;
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// All k1.1 values are in memtable.
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ASSERT_OK(Merge("k1.1", "r"));
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ASSERT_OK(Delete("k1.1"));
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ASSERT_OK(Merge("k1.1", "c"));
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ASSERT_OK(Merge("k1.1", "k"));
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ASSERT_OK(Merge("k1.1", "s"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k1.1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "c");
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ASSERT_EQ(values[1], "k");
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ASSERT_EQ(values[2], "s");
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// All k2 values are flushed to L0 into a single file.
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ASSERT_OK(Merge("k2", "q"));
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ASSERT_OK(Merge("k2", "w"));
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ASSERT_OK(Merge("k2", "e"));
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ASSERT_OK(Merge("k2", "r"));
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ASSERT_OK(Flush());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k2", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "q");
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ASSERT_EQ(values[1], "w");
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ASSERT_EQ(values[2], "e");
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ASSERT_EQ(values[3], "r");
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// All k2.1 values are flushed to L0 into a single file.
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ASSERT_OK(Merge("k2.1", "m"));
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ASSERT_OK(Put("k2.1", "l"));
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ASSERT_OK(Merge("k2.1", "n"));
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ASSERT_OK(Merge("k2.1", "o"));
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ASSERT_OK(Flush());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k2.1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "l,n,o");
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// All k2.2 values are flushed to L0 into a single file.
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ASSERT_OK(Merge("k2.2", "g"));
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ASSERT_OK(Delete("k2.2"));
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ASSERT_OK(Merge("k2.2", "o"));
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ASSERT_OK(Merge("k2.2", "t"));
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ASSERT_OK(Flush());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k2.2", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "o,t");
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// Do some compaction that will make the following tests more predictable
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// Slice start("PutARock");
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// Slice end("t");
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ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
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// All k3 values are flushed and are in different files.
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ASSERT_OK(Merge("k3", "ab"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "bc"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "cd"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "de"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k3", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "ab");
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ASSERT_EQ(values[1], "bc");
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ASSERT_EQ(values[2], "cd");
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ASSERT_EQ(values[3], "de");
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// All k3.1 values are flushed and are in different files.
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ASSERT_OK(Merge("k3.1", "ab"));
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ASSERT_OK(Flush());
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ASSERT_OK(Put("k3.1", "bc"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3.1", "cd"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3.1", "de"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k3.1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "bc");
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ASSERT_EQ(values[1], "cd");
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ASSERT_EQ(values[2], "de");
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// All k3.2 values are flushed and are in different files.
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ASSERT_OK(Merge("k3.2", "ab"));
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ASSERT_OK(Flush());
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ASSERT_OK(Delete("k3.2"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3.2", "cd"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3.2", "de"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k3.2", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "cd");
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ASSERT_EQ(values[1], "de");
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// All K4 values are in different levels
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ASSERT_OK(Merge("k4", "ba"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(4);
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ASSERT_OK(Merge("k4", "cb"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(3);
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ASSERT_OK(Merge("k4", "dc"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(1);
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ASSERT_OK(Merge("k4", "ed"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k4", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "ba");
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ASSERT_EQ(values[1], "cb");
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ASSERT_EQ(values[2], "dc");
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ASSERT_EQ(values[3], "ed");
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// First 3 k5 values are in SST and next 4 k5 values are in Immutable
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// Memtable
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ASSERT_OK(Merge("k5", "who"));
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ASSERT_OK(Merge("k5", "am"));
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ASSERT_OK(Merge("k5", "i"));
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ASSERT_OK(Flush());
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ASSERT_OK(Put("k5", "remember"));
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ASSERT_OK(Merge("k5", "i"));
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ASSERT_OK(Merge("k5", "am"));
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ASSERT_OK(Merge("k5", "rocks"));
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ASSERT_OK(dbfull()->TEST_SwitchMemtable());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k5", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "remember");
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ASSERT_EQ(values[1], "i");
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ASSERT_EQ(values[2], "am");
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}
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TEST_F(DBMergeOperandTest, BlobDBGetMergeOperandsBasic) {
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Options options;
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options.create_if_missing = true;
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options.enable_blob_files = true;
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options.min_blob_size = 0;
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// Use only the latest two merge operands.
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options.merge_operator = std::make_shared<LimitedStringAppendMergeOp>(2, ',');
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options.env = env_;
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Reopen(options);
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int num_records = 4;
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int number_of_operands = 0;
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std::vector<PinnableSlice> values(num_records);
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GetMergeOperandsOptions merge_operands_info;
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merge_operands_info.expected_max_number_of_operands = num_records;
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// All k1 values are in memtable.
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ASSERT_OK(Put("k1", "x"));
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ASSERT_OK(Merge("k1", "b"));
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ASSERT_OK(Merge("k1", "c"));
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ASSERT_OK(Merge("k1", "d"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k1", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "x");
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ASSERT_EQ(values[1], "b");
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ASSERT_EQ(values[2], "c");
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ASSERT_EQ(values[3], "d");
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// expected_max_number_of_operands is less than number of merge operands so
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// status should be Incomplete.
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merge_operands_info.expected_max_number_of_operands = num_records - 1;
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Status status = db_->GetMergeOperands(
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ReadOptions(), db_->DefaultColumnFamily(), "k1", values.data(),
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&merge_operands_info, &number_of_operands);
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ASSERT_EQ(status.IsIncomplete(), true);
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merge_operands_info.expected_max_number_of_operands = num_records;
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// All k2 values are flushed to L0 into a single file.
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ASSERT_OK(Put("k2", "q"));
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ASSERT_OK(Merge("k2", "w"));
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ASSERT_OK(Merge("k2", "e"));
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ASSERT_OK(Merge("k2", "r"));
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ASSERT_OK(Flush());
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k2", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "q,w,e,r");
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// Do some compaction that will make the following tests more predictable
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ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
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// All k3 values are flushed and are in different files.
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ASSERT_OK(Put("k3", "ab"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "bc"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "cd"));
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ASSERT_OK(Flush());
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ASSERT_OK(Merge("k3", "de"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k3", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "ab");
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ASSERT_EQ(values[1], "bc");
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ASSERT_EQ(values[2], "cd");
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ASSERT_EQ(values[3], "de");
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// All K4 values are in different levels
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ASSERT_OK(Put("k4", "ba"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(4);
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ASSERT_OK(Merge("k4", "cb"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(3);
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ASSERT_OK(Merge("k4", "dc"));
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ASSERT_OK(Flush());
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MoveFilesToLevel(1);
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ASSERT_OK(Merge("k4", "ed"));
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"k4", values.data(), &merge_operands_info,
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&number_of_operands));
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ASSERT_EQ(values[0], "ba");
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ASSERT_EQ(values[1], "cb");
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ASSERT_EQ(values[2], "dc");
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ASSERT_EQ(values[3], "ed");
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}
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TEST_F(DBMergeOperandTest, GetMergeOperandsLargeResultOptimization) {
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// These constants are chosen to trigger the large result optimization
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// (pinning a bundle of `DBImpl` resources).
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const int kNumOperands = 1024;
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const int kOperandLen = 1024;
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Options options;
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options.create_if_missing = true;
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options.merge_operator = MergeOperators::CreateStringAppendOperator();
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DestroyAndReopen(options);
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Random rnd(301);
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std::vector<std::string> expected_merge_operands;
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expected_merge_operands.reserve(kNumOperands);
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for (int i = 0; i < kNumOperands; ++i) {
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expected_merge_operands.emplace_back(rnd.RandomString(kOperandLen));
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ASSERT_OK(Merge("key", expected_merge_operands.back()));
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}
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std::vector<PinnableSlice> merge_operands(kNumOperands);
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GetMergeOperandsOptions merge_operands_info;
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merge_operands_info.expected_max_number_of_operands = kNumOperands;
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int num_merge_operands = 0;
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ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
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"key", merge_operands.data(),
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&merge_operands_info, &num_merge_operands));
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ASSERT_EQ(num_merge_operands, kNumOperands);
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// Ensures the large result optimization was used.
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for (int i = 0; i < kNumOperands; ++i) {
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ASSERT_TRUE(merge_operands[i].IsPinned());
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}
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// Add a Flush() to change the `SuperVersion` to challenge the resource
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// pinning.
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ASSERT_OK(Flush());
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for (int i = 0; i < kNumOperands; ++i) {
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ASSERT_EQ(expected_merge_operands[i], merge_operands[i]);
|
|
}
|
|
}
|
|
|
|
TEST_F(DBMergeOperandTest, GetMergeOperandsBaseDeletionInImmMem) {
|
|
// In this test, "k1" has a MERGE in a mutable memtable on top of a base
|
|
// DELETE in an immutable memtable.
|
|
Options opts = CurrentOptions();
|
|
opts.max_write_buffer_number = 10;
|
|
opts.min_write_buffer_number_to_merge = 10;
|
|
opts.merge_operator = MergeOperators::CreateDeprecatedPutOperator();
|
|
Reopen(opts);
|
|
|
|
ASSERT_OK(Put("k1", "val"));
|
|
ASSERT_OK(Flush());
|
|
|
|
ASSERT_OK(Put("k0", "val"));
|
|
ASSERT_OK(Delete("k1"));
|
|
ASSERT_OK(Put("k2", "val"));
|
|
ASSERT_OK(dbfull()->TEST_SwitchMemtable());
|
|
ASSERT_OK(Merge("k1", "val"));
|
|
|
|
{
|
|
std::vector<PinnableSlice> values(2);
|
|
|
|
GetMergeOperandsOptions merge_operands_info;
|
|
merge_operands_info.expected_max_number_of_operands =
|
|
static_cast<int>(values.size());
|
|
|
|
std::string key = "k1", from_db;
|
|
int number_of_operands = 0;
|
|
ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
|
|
key, values.data(), &merge_operands_info,
|
|
&number_of_operands));
|
|
ASSERT_EQ(1, number_of_operands);
|
|
from_db = values[0].ToString();
|
|
ASSERT_EQ("val", from_db);
|
|
}
|
|
|
|
{
|
|
std::string val;
|
|
ASSERT_OK(db_->Get(ReadOptions(), "k1", &val));
|
|
ASSERT_EQ("val", val);
|
|
}
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
int main(int argc, char** argv) {
|
|
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|
|
|