rocksdb/utilities/column_aware_encoding_test.cc

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#ifndef ROCKSDB_LITE
#include <vector>
#include "util/testharness.h"
#include "util/testutil.h"
#include "utilities/col_buf_decoder.h"
#include "utilities/col_buf_encoder.h"
namespace rocksdb {
class ColumnAwareEncodingTest : public testing::Test {
public:
ColumnAwareEncodingTest() {}
~ColumnAwareEncodingTest() {}
};
class ColumnAwareEncodingTestWithSize
: public ColumnAwareEncodingTest,
public testing::WithParamInterface<size_t> {
public:
ColumnAwareEncodingTestWithSize() {}
~ColumnAwareEncodingTestWithSize() {}
static std::vector<size_t> GetValues() { return {4, 8}; }
};
INSTANTIATE_TEST_CASE_P(
ColumnAwareEncodingTestWithSize, ColumnAwareEncodingTestWithSize,
::testing::ValuesIn(ColumnAwareEncodingTestWithSize::GetValues()));
TEST_P(ColumnAwareEncodingTestWithSize, NoCompressionEncodeDecode) {
size_t col_size = GetParam();
std::unique_ptr<ColBufEncoder> col_buf_encoder(
new FixedLengthColBufEncoder(col_size, kColNoCompression, false, true));
std::string str_buf;
uint64_t base_val = 0x0102030405060708;
uint64_t val = 0;
memcpy(&val, &base_val, col_size);
const int row_count = 4;
for (int i = 0; i < row_count; ++i) {
str_buf.append(reinterpret_cast<char*>(&val), col_size);
}
const char* str_buf_ptr = str_buf.c_str();
for (int i = 0; i < row_count; ++i) {
col_buf_encoder->Append(str_buf_ptr);
}
col_buf_encoder->Finish();
const std::string& encoded_data = col_buf_encoder->GetData();
// Check correctness of encoded string length
ASSERT_EQ(row_count * col_size, encoded_data.size());
const char* encoded_data_ptr = encoded_data.c_str();
uint64_t expected_encoded_val;
if (col_size == 8) {
expected_encoded_val = port::kLittleEndian ? 0x0807060504030201 : 0x0102030405060708;
} else if (col_size == 4) {
expected_encoded_val = port::kLittleEndian ? 0x08070605 : 0x0102030400000000;
}
uint64_t encoded_val = 0;
for (int i = 0; i < row_count; ++i) {
memcpy(&encoded_val, encoded_data_ptr, col_size);
// Check correctness of encoded value
ASSERT_EQ(expected_encoded_val, encoded_val);
encoded_data_ptr += col_size;
}
std::unique_ptr<ColBufDecoder> col_buf_decoder(
new FixedLengthColBufDecoder(col_size, kColNoCompression, false, true));
encoded_data_ptr = encoded_data.c_str();
encoded_data_ptr += col_buf_decoder->Init(encoded_data_ptr);
char* decoded_data = new char[100];
char* decoded_data_base = decoded_data;
for (int i = 0; i < row_count; ++i) {
encoded_data_ptr +=
col_buf_decoder->Decode(encoded_data_ptr, &decoded_data);
}
// Check correctness of decoded string length
ASSERT_EQ(row_count * col_size, decoded_data - decoded_data_base);
decoded_data = decoded_data_base;
for (int i = 0; i < row_count; ++i) {
uint64_t decoded_val;
decoded_val = 0;
memcpy(&decoded_val, decoded_data, col_size);
// Check correctness of decoded value
ASSERT_EQ(val, decoded_val);
decoded_data += col_size;
}
delete[] decoded_data_base;
}
TEST_P(ColumnAwareEncodingTestWithSize, RleEncodeDecode) {
size_t col_size = GetParam();
std::unique_ptr<ColBufEncoder> col_buf_encoder(
new FixedLengthColBufEncoder(col_size, kColRle, false, true));
std::string str_buf;
uint64_t base_val = 0x0102030405060708;
uint64_t val = 0;
memcpy(&val, &base_val, col_size);
const int row_count = 4;
for (int i = 0; i < row_count; ++i) {
str_buf.append(reinterpret_cast<char*>(&val), col_size);
}
const char* str_buf_ptr = str_buf.c_str();
for (int i = 0; i < row_count; ++i) {
str_buf_ptr += col_buf_encoder->Append(str_buf_ptr);
}
col_buf_encoder->Finish();
const std::string& encoded_data = col_buf_encoder->GetData();
// Check correctness of encoded string length
ASSERT_EQ(col_size + 1, encoded_data.size());
const char* encoded_data_ptr = encoded_data.c_str();
uint64_t encoded_val = 0;
memcpy(&encoded_val, encoded_data_ptr, col_size);
uint64_t expected_encoded_val;
if (col_size == 8) {
expected_encoded_val = port::kLittleEndian ? 0x0807060504030201 : 0x0102030405060708;
} else if (col_size == 4) {
expected_encoded_val = port::kLittleEndian ? 0x08070605 : 0x0102030400000000;
}
// Check correctness of encoded value
ASSERT_EQ(expected_encoded_val, encoded_val);
std::unique_ptr<ColBufDecoder> col_buf_decoder(
new FixedLengthColBufDecoder(col_size, kColRle, false, true));
char* decoded_data = new char[100];
char* decoded_data_base = decoded_data;
encoded_data_ptr += col_buf_decoder->Init(encoded_data_ptr);
for (int i = 0; i < row_count; ++i) {
encoded_data_ptr +=
col_buf_decoder->Decode(encoded_data_ptr, &decoded_data);
}
// Check correctness of decoded string length
ASSERT_EQ(decoded_data - decoded_data_base, row_count * col_size);
decoded_data = decoded_data_base;
for (int i = 0; i < row_count; ++i) {
uint64_t decoded_val;
decoded_val = 0;
memcpy(&decoded_val, decoded_data, col_size);
// Check correctness of decoded value
ASSERT_EQ(val, decoded_val);
decoded_data += col_size;
}
delete[] decoded_data_base;
}
TEST_P(ColumnAwareEncodingTestWithSize, DeltaEncodeDecode) {
size_t col_size = GetParam();
int row_count = 4;
std::unique_ptr<ColBufEncoder> col_buf_encoder(
new FixedLengthColBufEncoder(col_size, kColDeltaVarint, false, true));
std::string str_buf;
uint64_t base_val1 = port::kLittleEndian ? 0x0102030405060708 : 0x0807060504030201;
uint64_t base_val2 = port::kLittleEndian ? 0x0202030405060708 : 0x0807060504030202;
uint64_t val1 = 0, val2 = 0;
memcpy(&val1, &base_val1, col_size);
memcpy(&val2, &base_val2, col_size);
const char* str_buf_ptr;
for (int i = 0; i < row_count / 2; ++i) {
str_buf = std::string(reinterpret_cast<char*>(&val1), col_size);
str_buf_ptr = str_buf.c_str();
col_buf_encoder->Append(str_buf_ptr);
str_buf = std::string(reinterpret_cast<char*>(&val2), col_size);
str_buf_ptr = str_buf.c_str();
col_buf_encoder->Append(str_buf_ptr);
}
col_buf_encoder->Finish();
const std::string& encoded_data = col_buf_encoder->GetData();
// Check encoded string length
int varint_len = 0;
if (col_size == 8) {
varint_len = 9;
} else if (col_size == 4) {
varint_len = port::kLittleEndian ? 5 : 9;
}
// Check encoded string length: first value is original one (val - 0), the
// coming three are encoded as 1, -1, 1, so they should take 1 byte in varint.
ASSERT_EQ(varint_len + 3 * 1, encoded_data.size());
std::unique_ptr<ColBufDecoder> col_buf_decoder(
new FixedLengthColBufDecoder(col_size, kColDeltaVarint, false, true));
char* decoded_data = new char[100];
char* decoded_data_base = decoded_data;
const char* encoded_data_ptr = encoded_data.c_str();
encoded_data_ptr += col_buf_decoder->Init(encoded_data_ptr);
for (int i = 0; i < row_count; ++i) {
encoded_data_ptr +=
col_buf_decoder->Decode(encoded_data_ptr, &decoded_data);
}
// Check correctness of decoded string length
ASSERT_EQ(row_count * col_size, decoded_data - decoded_data_base);
decoded_data = decoded_data_base;
// Check correctness of decoded data
for (int i = 0; i < row_count / 2; ++i) {
uint64_t decoded_val = 0;
memcpy(&decoded_val, decoded_data, col_size);
ASSERT_EQ(val1, decoded_val);
decoded_data += col_size;
memcpy(&decoded_val, decoded_data, col_size);
ASSERT_EQ(val2, decoded_val);
decoded_data += col_size;
}
delete[] decoded_data_base;
}
TEST_F(ColumnAwareEncodingTest, ChunkBufEncodeDecode) {
std::unique_ptr<ColBufEncoder> col_buf_encoder(
new VariableChunkColBufEncoder(kColDict));
std::string buf("12345678\377\1\0\0\0\0\0\0\0\376", 18);
col_buf_encoder->Append(buf.c_str());
col_buf_encoder->Finish();
const std::string& encoded_data = col_buf_encoder->GetData();
const char* str_ptr = encoded_data.c_str();
std::unique_ptr<ColBufDecoder> col_buf_decoder(
new VariableChunkColBufDecoder(kColDict));
str_ptr += col_buf_decoder->Init(str_ptr);
char* decoded_data = new char[100];
char* decoded_data_base = decoded_data;
col_buf_decoder->Decode(str_ptr, &decoded_data);
for (size_t i = 0; i < buf.size(); ++i) {
ASSERT_EQ(buf[i], decoded_data_base[i]);
}
delete[] decoded_data_base;
}
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
#else
#include <cstdio>
int main() {
fprintf(stderr,
"SKIPPED as column aware encoding experiment is not enabled in "
"ROCKSDB_LITE\n");
}
#endif // ROCKSDB_LITE