#pragma once #include "config.h" #if USE_AWS_S3 #include #include #include #include #include #include #include #include #include #include #include #include #include #include namespace Aws::S3 { class Client; } namespace DB { class PullingPipelineExecutor; class StorageS3SequentialSource; class NamedCollection; class StorageS3Source : public ISource, WithContext { public: struct KeyWithInfo { KeyWithInfo() = default; KeyWithInfo(String key_, std::optional info_) : key(std::move(key_)), info(std::move(info_)) { } String key; std::optional info; }; using KeysWithInfo = std::vector; using ObjectInfos = std::unordered_map; class IIterator { public: virtual ~IIterator() = default; virtual KeyWithInfo next() = 0; virtual size_t getTotalSize() const = 0; KeyWithInfo operator ()() { return next(); } }; class DisclosedGlobIterator : public IIterator { public: DisclosedGlobIterator( const S3::Client & client_, const S3::URI & globbed_uri_, ASTPtr query, const Block & virtual_header, ContextPtr context, ObjectInfos * object_infos = nullptr, Strings * read_keys_ = nullptr, const S3Settings::RequestSettings & request_settings_ = {}); KeyWithInfo next() override; size_t getTotalSize() const override; private: class Impl; /// shared_ptr to have copy constructor std::shared_ptr pimpl; }; class KeysIterator : public IIterator { public: explicit KeysIterator( const S3::Client & client_, const std::string & version_id_, const std::vector & keys_, const String & bucket_, const S3Settings::RequestSettings & request_settings_, ASTPtr query, const Block & virtual_header, ContextPtr context, ObjectInfos * object_infos = nullptr, Strings * read_keys = nullptr); KeyWithInfo next() override; size_t getTotalSize() const override; private: class Impl; /// shared_ptr to have copy constructor std::shared_ptr pimpl; }; class ReadTaskIterator : public IIterator { public: explicit ReadTaskIterator(const ReadTaskCallback & callback_) : callback(callback_) {} KeyWithInfo next() override { return {callback(), {}}; } size_t getTotalSize() const override { return 0; } private: ReadTaskCallback callback; }; static Block getHeader(Block sample_block, const std::vector & requested_virtual_columns); StorageS3Source( const std::vector & requested_virtual_columns_, const String & format, String name_, const Block & sample_block, ContextPtr context_, std::optional format_settings_, const ColumnsDescription & columns_, UInt64 max_block_size_, const S3Settings::RequestSettings & request_settings_, String compression_hint_, const std::shared_ptr & client_, const String & bucket, const String & version_id, std::shared_ptr file_iterator_, size_t download_thread_num); ~StorageS3Source() override; String getName() const override; Chunk generate() override; private: String name; String bucket; String version_id; String format; ColumnsDescription columns_desc; UInt64 max_block_size; S3Settings::RequestSettings request_settings; String compression_hint; std::shared_ptr client; Block sample_block; std::optional format_settings; struct ReaderHolder { public: ReaderHolder( String path_, std::unique_ptr read_buf_, std::unique_ptr pipeline_, std::unique_ptr reader_) : path(std::move(path_)) , read_buf(std::move(read_buf_)) , pipeline(std::move(pipeline_)) , reader(std::move(reader_)) { } ReaderHolder() = default; ReaderHolder(const ReaderHolder & other) = delete; ReaderHolder & operator=(const ReaderHolder & other) = delete; ReaderHolder(ReaderHolder && other) noexcept { *this = std::move(other); } ReaderHolder & operator=(ReaderHolder && other) noexcept { /// The order of destruction is important. /// reader uses pipeline, pipeline uses read_buf. reader = std::move(other.reader); pipeline = std::move(other.pipeline); read_buf = std::move(other.read_buf); path = std::move(other.path); return *this; } explicit operator bool() const { return reader != nullptr; } PullingPipelineExecutor * operator->() { return reader.get(); } const PullingPipelineExecutor * operator->() const { return reader.get(); } const String & getPath() const { return path; } private: String path; std::unique_ptr read_buf; std::unique_ptr pipeline; std::unique_ptr reader; }; ReaderHolder reader; std::vector requested_virtual_columns; std::shared_ptr file_iterator; size_t download_thread_num = 1; Poco::Logger * log = &Poco::Logger::get("StorageS3Source"); ThreadPool create_reader_pool; ThreadPoolCallbackRunner create_reader_scheduler; std::future reader_future; UInt64 total_rows_approx_max = 0; size_t total_rows_count_times = 0; UInt64 total_rows_approx_accumulated = 0; /// Recreate ReadBuffer and Pipeline for each file. ReaderHolder createReader(); std::future createReaderAsync(); std::unique_ptr createS3ReadBuffer(const String & key, size_t object_size); std::unique_ptr createAsyncS3ReadBuffer(const String & key, const ReadSettings & read_settings, size_t object_size); }; /** * This class represents table engine for external S3 urls. * It sends HTTP GET to server when select is called and * HTTP PUT when insert is called. */ class StorageS3 : public IStorage, WithContext { public: struct Configuration : public StatelessTableEngineConfiguration { S3::URI url; std::shared_ptr client; S3::AuthSettings auth_settings; S3Settings::RequestSettings request_settings; /// If s3 configuration was passed from ast, then it is static. /// If from config - it can be changed with config reload. bool static_configuration = true; /// Headers from ast is a part of static configuration. HTTPHeaderEntries headers_from_ast; void appendToPath(const String & suffix) { url = S3::URI{std::filesystem::path(url.uri.toString()) / suffix}; } String getPath() const { return url.uri.toString(); } /// For logging }; StorageS3( const StorageS3::Configuration & configuration_, const StorageID & table_id_, const ColumnsDescription & columns_, const ConstraintsDescription & constraints_, const String & comment, ContextPtr context_, std::optional format_settings_, bool distributed_processing_ = false, ASTPtr partition_by_ = nullptr); String getName() const override { return name; } Pipe read( const Names & column_names, const StorageSnapshotPtr & storage_snapshot, SelectQueryInfo & query_info, ContextPtr context, QueryProcessingStage::Enum processed_stage, size_t max_block_size, size_t num_streams) override; SinkToStoragePtr write(const ASTPtr & query, const StorageMetadataPtr & /*metadata_snapshot*/, ContextPtr context) override; void truncate(const ASTPtr & query, const StorageMetadataPtr & metadata_snapshot, ContextPtr local_context, TableExclusiveLockHolder &) override; NamesAndTypesList getVirtuals() const override; bool supportsPartitionBy() const override; using ObjectInfos = StorageS3Source::ObjectInfos; static void processNamedCollectionResult(StorageS3::Configuration & configuration, const NamedCollection & collection); static SchemaCache & getSchemaCache(const ContextPtr & ctx); static StorageS3::Configuration getConfiguration(ASTs & engine_args, ContextPtr local_context, bool get_format_from_file = true); static ColumnsDescription getTableStructureFromData( StorageS3::Configuration & configuration, const std::optional & format_settings, ContextPtr ctx, ObjectInfos * object_infos = nullptr); protected: static StorageS3::Configuration updateConfiguration(ContextPtr local_context, const Configuration & configuration); static void updateConfiguration(ContextPtr local_context, Configuration & configuration); private: friend class StorageS3Cluster; friend class TableFunctionS3Cluster; Configuration s3_configuration; std::vector keys; NamesAndTypesList virtual_columns; Block virtual_block; String format_name; String compression_method; String name; const bool distributed_processing; std::optional format_settings; ASTPtr partition_by; bool is_key_with_globs = false; ObjectInfos object_infos; static void updateS3Configuration(ContextPtr, Configuration &); static std::shared_ptr createFileIterator( const Configuration & s3_configuration, const std::vector & keys, bool is_key_with_globs, bool distributed_processing, ContextPtr local_context, ASTPtr query, const Block & virtual_block, ObjectInfos * object_infos = nullptr, Strings * read_keys = nullptr); static ColumnsDescription getTableStructureFromDataImpl( const String & format, const Configuration & s3_configuration, const String & compression_method, bool is_key_with_globs, const std::optional & format_settings, ContextPtr ctx, ObjectInfos * object_infos = nullptr); bool supportsSubcolumns() const override; bool supportsSubsetOfColumns() const override; static std::optional tryGetColumnsFromCache( const Strings::const_iterator & begin, const Strings::const_iterator & end, const Configuration & s3_configuration, ObjectInfos * object_infos, const String & format_name, const std::optional & format_settings, const ContextPtr & ctx); static void addColumnsToCache( const Strings & keys, const Configuration & s3_configuration, const ColumnsDescription & columns, const String & format_name, const std::optional & format_settings, const ContextPtr & ctx); }; } #endif