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98 lines
3.2 KiB
C++
98 lines
3.2 KiB
C++
#include "FileDictionarySource.h"
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#include <Common/logger_useful.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/filesystemHelpers.h>
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#include <IO/ReadBufferFromFile.h>
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#include <Interpreters/Context.h>
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#include <Processors/Formats/IInputFormat.h>
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#include "DictionarySourceFactory.h"
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#include "DictionaryStructure.h"
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#include "registerDictionaries.h"
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#include "DictionarySourceHelpers.h"
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namespace DB
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{
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static const UInt64 max_block_size = 8192;
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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extern const int PATH_ACCESS_DENIED;
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}
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FileDictionarySource::FileDictionarySource(
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const std::string & filepath_, const std::string & format_,
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Block & sample_block_, ContextPtr context_, bool created_from_ddl)
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: filepath{filepath_}
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, format{format_}
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, sample_block{sample_block_}
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, context(context_)
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{
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auto user_files_path = context->getUserFilesPath();
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if (created_from_ddl && !fileOrSymlinkPathStartsWith(filepath, user_files_path))
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throw Exception(ErrorCodes::PATH_ACCESS_DENIED, "File path {} is not inside {}", filepath, user_files_path);
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}
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FileDictionarySource::FileDictionarySource(const FileDictionarySource & other)
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: filepath{other.filepath}
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, format{other.format}
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, sample_block{other.sample_block}
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, context(Context::createCopy(other.context))
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, last_modification{other.last_modification}
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{
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}
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QueryPipeline FileDictionarySource::loadAll()
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{
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LOG_TRACE(&Poco::Logger::get("FileDictionary"), "loadAll {}", toString());
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auto in_ptr = std::make_unique<ReadBufferFromFile>(filepath);
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auto source = context->getInputFormat(format, *in_ptr, sample_block, max_block_size);
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source->addBuffer(std::move(in_ptr));
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last_modification = getLastModification();
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return QueryPipeline(std::move(source));
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}
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std::string FileDictionarySource::toString() const
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{
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return fmt::format("File: {}, {}", filepath, format);
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}
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Poco::Timestamp FileDictionarySource::getLastModification() const
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{
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return FS::getModificationTimestamp(filepath);
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}
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void registerDictionarySourceFile(DictionarySourceFactory & factory)
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{
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auto create_table_source = [=](const DictionaryStructure & dict_struct,
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const Poco::Util::AbstractConfiguration & config,
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const std::string & config_prefix,
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Block & sample_block,
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ContextPtr global_context,
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const std::string & /* default_database */,
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bool created_from_ddl) -> DictionarySourcePtr
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{
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if (dict_struct.has_expressions)
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throw Exception(ErrorCodes::LOGICAL_ERROR, "Dictionary source of type `file` does not support attribute expressions");
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const auto filepath = config.getString(config_prefix + ".file.path");
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const auto format = config.getString(config_prefix + ".file.format");
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const auto context = copyContextAndApplySettingsFromDictionaryConfig(global_context, config, config_prefix);
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return std::make_unique<FileDictionarySource>(filepath, format, sample_block, context, created_from_ddl);
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};
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factory.registerSource("file", create_table_source);
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}
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}
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