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dd2371e071
* Split ComplexKeyCacheDictionary to faster compile (part2) * Dictionaries as lib WIP * wip * clean * Fix build with old capnp * fix * wip * fixes * fix * clean * clean * clean * wip * wip * wip * flat * wip * cache * clean * wip * faster * fix style * fixes * clean * clean * Split CacheDictionary.cpp for faster compile * fix * fix * Less memory usage while compiling * missing file * format * Update registerDictionaries.h * clean
83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
#pragma once
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#include "DictionaryStructure.h"
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#include "ExternalResultDescription.h"
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#include "IDictionarySource.h"
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#include <Common/SharedLibrary.h>
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#include <common/LocalDateTime.h>
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namespace Poco
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{
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class Logger;
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namespace Util
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{
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class AbstractConfiguration;
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}
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}
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namespace DB
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{
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class CStringsHolder;
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/// Allows loading dictionaries from dynamic libraries (.so)
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/// Experimental version
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/// Example: dbms/tests/external_dictionaries/dictionary_library/dictionary_library.cpp
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class LibraryDictionarySource final : public IDictionarySource
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{
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public:
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LibraryDictionarySource(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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const Context & context);
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LibraryDictionarySource(const LibraryDictionarySource & other);
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~LibraryDictionarySource() override;
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BlockInputStreamPtr loadAll() override;
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BlockInputStreamPtr loadUpdatedAll() override
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{
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throw Exception{"Method loadUpdatedAll is unsupported for LibraryDictionarySource", ErrorCodes::NOT_IMPLEMENTED};
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}
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BlockInputStreamPtr loadIds(const std::vector<UInt64> & ids) override;
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BlockInputStreamPtr loadKeys(const Columns & key_columns, const std::vector<std::size_t> & requested_rows) override;
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bool isModified() const override;
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bool supportsSelectiveLoad() const override;
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///Not yet supported
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bool hasUpdateField() const override
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{
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return false;
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}
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DictionarySourcePtr clone() const override;
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std::string toString() const override;
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private:
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Poco::Logger * log;
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LocalDateTime getLastModification() const;
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const DictionaryStructure dict_struct;
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const std::string config_prefix;
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const std::string path;
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Block sample_block;
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const Context & context;
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SharedLibraryPtr library;
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ExternalResultDescription description;
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std::shared_ptr<CStringsHolder> settings;
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void * lib_data = nullptr;
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};
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}
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