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63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
#pragma once
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#include "DictionaryStructure.h"
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#include "IDictionarySource.h"
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#include <Core/Block.h>
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#include <Interpreters/Context.h>
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namespace Poco { class Logger; }
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namespace DB
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{
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/// Allows loading dictionaries from executable
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class ExecutableDictionarySource final : public IDictionarySource
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{
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public:
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ExecutableDictionarySource(
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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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ExecutableDictionarySource(const ExecutableDictionarySource & other);
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ExecutableDictionarySource & operator=(const ExecutableDictionarySource &) = delete;
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BlockInputStreamPtr loadAll() override;
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/** The logic of this method is flawed, absolutely incorrect and ignorant.
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* It may lead to skipping some values due to clock sync or timezone changes.
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* The intended usage of "update_field" is totally different.
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*/
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BlockInputStreamPtr loadUpdatedAll() override;
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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<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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bool hasUpdateField() const override;
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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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time_t update_time = 0;
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const DictionaryStructure dict_struct;
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const std::string command;
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const std::string update_field;
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const std::string format;
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Block sample_block;
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Context context;
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};
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}
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