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https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 01:41:59 +00:00
221 lines
8.6 KiB
C++
221 lines
8.6 KiB
C++
#include "SharedLibraryHandler.h"
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#include <base/scope_guard.h>
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#include <base/bit_cast.h>
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#include <base/find_symbols.h>
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#include <IO/ReadHelpers.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int EXTERNAL_LIBRARY_ERROR;
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extern const int SIZES_OF_COLUMNS_DOESNT_MATCH;
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}
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SharedLibraryHandler::SharedLibraryHandler(
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const std::string & library_path_,
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const std::vector<std::string> & library_settings,
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const Block & sample_block_,
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const std::vector<std::string> & attributes_names_)
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: library_path(library_path_)
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, sample_block(sample_block_)
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, attributes_names(attributes_names_)
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{
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library = std::make_shared<SharedLibrary>(library_path, RTLD_LAZY);
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settings_holder = std::make_shared<CStringsHolder>(CStringsHolder(library_settings));
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auto lib_new = library->tryGet<ClickHouseLibrary::LibraryNewFunc>(ClickHouseLibrary::LIBRARY_CREATE_NEW_FUNC_NAME);
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if (lib_new)
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lib_data = lib_new(&settings_holder->strings, ClickHouseLibrary::log);
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else
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throw Exception("Method libNew failed", ErrorCodes::EXTERNAL_LIBRARY_ERROR);
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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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, sample_block{other.sample_block}
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, attributes_names{other.attributes_names}
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, library{other.library}
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, settings_holder{other.settings_holder}
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{
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auto lib_clone = library->tryGet<ClickHouseLibrary::LibraryCloneFunc>(ClickHouseLibrary::LIBRARY_CLONE_FUNC_NAME);
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if (lib_clone)
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{
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lib_data = lib_clone(other.lib_data);
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}
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else
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{
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auto lib_new = library->tryGet<ClickHouseLibrary::LibraryNewFunc>(ClickHouseLibrary::LIBRARY_CREATE_NEW_FUNC_NAME);
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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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}
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SharedLibraryHandler::~SharedLibraryHandler()
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{
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auto lib_delete = library->tryGet<ClickHouseLibrary::LibraryDeleteFunc>(ClickHouseLibrary::LIBRARY_DELETE_FUNC_NAME);
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if (lib_delete)
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lib_delete(lib_data);
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}
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bool SharedLibraryHandler::isModified()
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{
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auto func_is_modified = library->tryGet<ClickHouseLibrary::LibraryIsModifiedFunc>(ClickHouseLibrary::LIBRARY_IS_MODIFIED_FUNC_NAME);
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if (func_is_modified)
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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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auto func_supports_selective_load = library->tryGet<ClickHouseLibrary::LibrarySupportsSelectiveLoadFunc>(ClickHouseLibrary::LIBRARY_SUPPORTS_SELECTIVE_LOAD_FUNC_NAME);
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if (func_supports_selective_load)
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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()
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{
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auto columns_holder = std::make_unique<ClickHouseLibrary::CString[]>(attributes_names.size());
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ClickHouseLibrary::CStrings columns{static_cast<decltype(ClickHouseLibrary::CStrings::data)>(columns_holder.get()), attributes_names.size()};
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for (size_t i = 0; i < attributes_names.size(); ++i)
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columns.data[i] = attributes_names[i].c_str();
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auto load_all_func = library->get<ClickHouseLibrary::LibraryLoadAllFunc>(ClickHouseLibrary::LIBRARY_LOAD_ALL_FUNC_NAME);
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auto data_new_func = library->get<ClickHouseLibrary::LibraryDataNewFunc>(ClickHouseLibrary::LIBRARY_DATA_NEW_FUNC_NAME);
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auto data_delete_func = library->get<ClickHouseLibrary::LibraryDataDeleteFunc>(ClickHouseLibrary::LIBRARY_DATA_DELETE_FUNC_NAME);
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ClickHouseLibrary::LibraryData data_ptr = data_new_func(lib_data);
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SCOPE_EXIT(data_delete_func(lib_data, data_ptr));
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ClickHouseLibrary::RawClickHouseLibraryTable data = load_all_func(data_ptr, &settings_holder->strings, &columns);
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auto block = dataToBlock(data);
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return std::make_shared<OneBlockInputStream>(block);
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}
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BlockInputStreamPtr SharedLibraryHandler::loadIds(const std::vector<uint64_t> & ids)
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{
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const ClickHouseLibrary::VectorUInt64 ids_data{bit_cast<decltype(ClickHouseLibrary::VectorUInt64::data)>(ids.data()), ids.size()};
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auto columns_holder = std::make_unique<ClickHouseLibrary::CString[]>(attributes_names.size());
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ClickHouseLibrary::CStrings columns_pass{static_cast<decltype(ClickHouseLibrary::CStrings::data)>(columns_holder.get()), attributes_names.size()};
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auto load_ids_func = library->get<ClickHouseLibrary::LibraryLoadIdsFunc>(ClickHouseLibrary::LIBRARY_LOAD_IDS_FUNC_NAME);
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auto data_new_func = library->get<ClickHouseLibrary::LibraryDataNewFunc>(ClickHouseLibrary::LIBRARY_DATA_NEW_FUNC_NAME);
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auto data_delete_func = library->get<ClickHouseLibrary::LibraryDataDeleteFunc>(ClickHouseLibrary::LIBRARY_DATA_DELETE_FUNC_NAME);
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ClickHouseLibrary::LibraryData data_ptr = data_new_func(lib_data);
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SCOPE_EXIT(data_delete_func(lib_data, data_ptr));
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ClickHouseLibrary::RawClickHouseLibraryTable data = load_ids_func(data_ptr, &settings_holder->strings, &columns_pass, &ids_data);
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auto block = dataToBlock(data);
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return std::make_shared<OneBlockInputStream>(block);
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}
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BlockInputStreamPtr SharedLibraryHandler::loadKeys(const Columns & key_columns)
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{
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auto holder = std::make_unique<ClickHouseLibrary::Row[]>(key_columns.size());
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std::vector<std::unique_ptr<ClickHouseLibrary::Field[]>> column_data_holders;
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for (size_t i = 0; i < key_columns.size(); ++i)
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{
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auto cell_holder = std::make_unique<ClickHouseLibrary::Field[]>(key_columns[i]->size());
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for (size_t j = 0; j < key_columns[i]->size(); ++j)
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{
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auto data_ref = key_columns[i]->getDataAt(j);
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cell_holder[j] = ClickHouseLibrary::Field{
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.data = static_cast<const void *>(data_ref.data),
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.size = data_ref.size};
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}
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holder[i] = ClickHouseLibrary::Row{
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.data = static_cast<ClickHouseLibrary::Field *>(cell_holder.get()),
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.size = key_columns[i]->size()};
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column_data_holders.push_back(std::move(cell_holder));
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}
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ClickHouseLibrary::Table request_cols{
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.data = static_cast<ClickHouseLibrary::Row *>(holder.get()),
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.size = key_columns.size()};
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auto load_keys_func = library->get<ClickHouseLibrary::LibraryLoadKeysFunc>(ClickHouseLibrary::LIBRARY_LOAD_KEYS_FUNC_NAME);
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auto data_new_func = library->get<ClickHouseLibrary::LibraryDataNewFunc>(ClickHouseLibrary::LIBRARY_DATA_NEW_FUNC_NAME);
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auto data_delete_func = library->get<ClickHouseLibrary::LibraryDataDeleteFunc>(ClickHouseLibrary::LIBRARY_DATA_DELETE_FUNC_NAME);
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ClickHouseLibrary::LibraryData data_ptr = data_new_func(lib_data);
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SCOPE_EXIT(data_delete_func(lib_data, data_ptr));
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ClickHouseLibrary::RawClickHouseLibraryTable data = load_keys_func(data_ptr, &settings_holder->strings, &request_cols);
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auto block = dataToBlock(data);
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return std::make_shared<OneBlockInputStream>(block);
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}
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Block SharedLibraryHandler::dataToBlock(const ClickHouseLibrary::RawClickHouseLibraryTable 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.cloneEmptyColumns();
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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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