mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 16:50:48 +00:00
176 lines
7.3 KiB
C++
176 lines
7.3 KiB
C++
#include "SharedLibraryHandler.h"
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#include <boost/algorithm/string/split.hpp>
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#include <ext/scope_guard.h>
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#include <IO/ReadHelpers.h>
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namespace DB
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{
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SharedLibraryHandler::SharedLibraryHandler(const SharedLibraryHandler & other)
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: library_path{other.library_path}
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, library{other.library}
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, settings_holder{other.settings_holder}
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{
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if (auto lib_clone = library->tryGet<decltype(lib_data) (*)(decltype(other.lib_data))>("ClickHouseDictionary_v3_libClone"))
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lib_data = lib_clone(other.lib_data);
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else if (auto lib_new = library->tryGet<decltype(lib_data) (*)(decltype(&settings_holder->strings), decltype(&ClickHouseLibrary::log))>("ClickHouseDictionary_v3_libNew"))
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lib_data = lib_new(&settings_holder->strings, ClickHouseLibrary::log);
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}
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SharedLibraryHandler::~SharedLibraryHandler()
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{
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auto lib_delete = library->tryGet<void (*)(decltype(lib_data))>("ClickHouseDictionary_v3_libDelete");
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if (lib_delete)
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lib_delete(lib_data);
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}
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void SharedLibraryHandler::libNew(const std::string & path, const std::string & settings)
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{
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library_path = path;
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library = std::make_shared<SharedLibrary>(library_path, RTLD_LAZY
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#if defined(RTLD_DEEPBIND) && !defined(ADDRESS_SANITIZER) // Does not exists in FreeBSD. Cannot work with Address Sanitizer.
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| RTLD_DEEPBIND
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#endif
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);
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std::vector<std::string> lib_settings;
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boost::split(lib_settings, settings, [](char c) { return c == ' '; });
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settings_holder = std::make_shared<CStringsHolder>(CStringsHolder(lib_settings));
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auto lib_new = library->tryGet<decltype(lib_data) (*)(
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decltype(&settings_holder->strings), decltype(&ClickHouseLibrary::log))>("ClickHouseDictionary_v3_libNew");
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if (lib_new)
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lib_data = lib_new(&settings_holder->strings, ClickHouseLibrary::log);
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}
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bool SharedLibraryHandler::isModified()
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{
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if (auto func_is_modified = library->tryGet<bool (*)(
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decltype(lib_data), decltype(&settings_holder->strings))>("ClickHouseDictionary_v3_isModified"))
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return func_is_modified(lib_data, &settings_holder->strings);
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return true;
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}
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bool SharedLibraryHandler::supportsSelectiveLoad()
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{
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if (auto func_supports_selective_load = library->tryGet<bool (*)(
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decltype(lib_data), decltype(&settings_holder->strings))>("ClickHouseDictionary_v3_supportsSelectiveLoad"))
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return func_supports_selective_load(lib_data, &settings_holder->strings);
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return true;
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}
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BlockInputStreamPtr SharedLibraryHandler::loadAll(const std::string & attributes_string, const Block & sample_block)
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{
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std::vector<std::string> dict_attributes;
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boost::split(dict_attributes, attributes_string, [](char c) { return c == ' '; });
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auto columns_holder = std::make_unique<ClickHouseLibrary::CString[]>(dict_attributes.size());
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ClickHouseLibrary::CStrings columns{static_cast<decltype(ClickHouseLibrary::CStrings::data)>(columns_holder.get()), dict_attributes.size()};
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size_t i = 0;
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for (const auto & attr : dict_attributes)
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columns.data[i++] = attr.c_str();
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void * data_ptr = nullptr;
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/// Get function pointer before dataNew call because library->get may throw.
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auto func_load_all = library->get<void * (*)(
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decltype(data_ptr), decltype(&settings_holder->strings), decltype(&columns))>("ClickHouseDictionary_v3_loadAll");
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data_ptr = library->get<decltype(data_ptr) (*)(decltype(lib_data))>("ClickHouseDictionary_v3_dataNew")(lib_data);
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auto * data = func_load_all(data_ptr, &settings_holder->strings, &columns);
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auto block = dataToBlock(sample_block, data);
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SCOPE_EXIT(library->get<void (*)(decltype(lib_data), decltype(data_ptr))>("ClickHouseDictionary_v3_dataDelete")(lib_data, data_ptr));
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return std::make_shared<OneBlockInputStream>(block);
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}
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BlockInputStreamPtr SharedLibraryHandler::loadIds(const std::string & attributes_string, const std::string & ids_string, const Block & sample_block)
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{
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std::vector<std::string> dict_string_ids;
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boost::split(dict_string_ids, ids_string, [](char c) { return c == ' '; });
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std::vector<UInt64> dict_ids;
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for (const auto & id : dict_string_ids)
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dict_ids.push_back(parseFromString<UInt64>(id));
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std::vector<std::string> dict_attributes;
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boost::split(dict_attributes, attributes_string, [](char c) { return c == ','; });
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const ClickHouseLibrary::VectorUInt64 ids_data{ext::bit_cast<decltype(ClickHouseLibrary::VectorUInt64::data)>(dict_ids.data()), dict_ids.size()};
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auto columns_holder = std::make_unique<ClickHouseLibrary::CString[]>(dict_attributes.size());
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ClickHouseLibrary::CStrings columns_pass{static_cast<decltype(ClickHouseLibrary::CStrings::data)>(columns_holder.get()), dict_attributes.size()};
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void * data_ptr = nullptr;
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/// Get function pointer before dataNew call because library->get may throw.
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auto func_load_ids = library->get<void * (*)(
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decltype(data_ptr), decltype(&settings_holder->strings), decltype(&columns_pass), decltype(&ids_data))>("ClickHouseDictionary_v3_loadIds");
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data_ptr = library->get<decltype(data_ptr) (*)(decltype(lib_data))>("ClickHouseDictionary_v3_dataNew")(lib_data);
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auto * data = func_load_ids(data_ptr, &settings_holder->strings, &columns_pass, &ids_data);
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auto block = dataToBlock(sample_block, data);
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SCOPE_EXIT(library->get<void (*)(decltype(lib_data), decltype(data_ptr))>("ClickHouseDictionary_v3_dataDelete")(lib_data, data_ptr));
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return std::make_shared<OneBlockInputStream>(block);
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}
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Block SharedLibraryHandler::dataToBlock(const Block & sample_block, const void * data)
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{
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if (!data)
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throw Exception("LibraryDictionarySource: No data returned", ErrorCodes::EXTERNAL_LIBRARY_ERROR);
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const auto * columns_received = static_cast<const ClickHouseLibrary::Table *>(data);
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if (columns_received->error_code)
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throw Exception(
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"LibraryDictionarySource: Returned error: " + std::to_string(columns_received->error_code) + " " + (columns_received->error_string ? columns_received->error_string : ""),
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ErrorCodes::EXTERNAL_LIBRARY_ERROR);
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MutableColumns columns(sample_block.columns());
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for (const auto i : ext::range(0, columns.size()))
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columns[i] = sample_block.getByPosition(i).column->cloneEmpty();
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for (size_t col_n = 0; col_n < columns_received->size; ++col_n)
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{
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if (columns.size() != columns_received->data[col_n].size)
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throw Exception(
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"LibraryDictionarySource: Returned unexpected number of columns: " + std::to_string(columns_received->data[col_n].size) + ", must be " + std::to_string(columns.size()),
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ErrorCodes::SIZES_OF_COLUMNS_DOESNT_MATCH);
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for (size_t row_n = 0; row_n < columns_received->data[col_n].size; ++row_n)
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{
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const auto & field = columns_received->data[col_n].data[row_n];
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if (!field.data)
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{
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/// sample_block contains null_value (from config) inside corresponding column
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const auto & col = sample_block.getByPosition(row_n);
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columns[row_n]->insertFrom(*(col.column), 0);
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}
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else
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{
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const auto & size = field.size;
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columns[row_n]->insertData(static_cast<const char *>(field.data), size);
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}
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}
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}
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return sample_block.cloneWithColumns(std::move(columns));
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}
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}
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