rocksdb/utilities/column_aware_encoding_util.h

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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.
#pragma once
#ifndef ROCKSDB_LITE
#include <string>
#include <vector>
#include "db/dbformat.h"
#include "include/rocksdb/env.h"
#include "include/rocksdb/immutable_options.h"
#include "include/rocksdb/listener.h"
#include "include/rocksdb/options.h"
#include "include/rocksdb/status.h"
#include "table/block_based_table_reader.h"
namespace rocksdb {
struct ColDeclaration;
struct KVPairColDeclarations;
class ColumnAwareEncodingReader {
public:
explicit ColumnAwareEncodingReader(const std::string& file_name);
void GetKVPairsFromDataBlocks(std::vector<KVPairBlock>* kv_pair_blocks);
void EncodeBlocksToRowFormat(WritableFile* out_file,
CompressionType compression_type,
const std::vector<KVPairBlock>& kv_pair_blocks,
std::vector<std::string>* blocks);
void DecodeBlocksFromRowFormat(WritableFile* out_file,
const std::vector<std::string>* blocks);
void DumpDataColumns(const std::string& filename,
const KVPairColDeclarations& kvp_col_declarations,
const std::vector<KVPairBlock>& kv_pair_blocks);
Status EncodeBlocks(const KVPairColDeclarations& kvp_col_declarations,
WritableFile* out_file, CompressionType compression_type,
const std::vector<KVPairBlock>& kv_pair_blocks,
std::vector<std::string>* blocks, bool print_column_stat);
void DecodeBlocks(const KVPairColDeclarations& kvp_col_declarations,
WritableFile* out_file,
const std::vector<std::string>* blocks);
static void GetColDeclarationsPrimary(
std::vector<ColDeclaration>** key_col_declarations,
std::vector<ColDeclaration>** value_col_declarations,
ColDeclaration** value_checksum_declaration);
static void GetColDeclarationsSecondary(
std::vector<ColDeclaration>** key_col_declarations,
std::vector<ColDeclaration>** value_col_declarations,
ColDeclaration** value_checksum_declaration);
private:
// Init the TableReader for the sst file
void InitTableReader(const std::string& file_path);
std::string file_name_;
EnvOptions soptions_;
Options options_;
Status init_result_;
std::unique_ptr<BlockBasedTable> table_reader_;
std::unique_ptr<RandomAccessFileReader> file_;
const ImmutableCFOptions ioptions_;
InternalKeyComparator internal_comparator_;
std::unique_ptr<TableProperties> table_properties_;
};
} // namespace rocksdb
#endif // ROCKSDB_LITE