ClickHouse/dbms/include/DB/Dictionaries/HTTPDictionarySource.h

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#pragma once
#include <DB/Dictionaries/IDictionarySource.h>
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#include <DB/Dictionaries/DictionaryStructure.h>
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namespace DB
{
/// Allows loading dictionaries from executable
class HTTPDictionarySource final : public IDictionarySource
{
public:
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HTTPDictionarySource(const DictionaryStructure & dict_struct_,
const Poco::Util::AbstractConfiguration & config,
const std::string & config_prefix,
Block & sample_block,
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const Context & context);
HTTPDictionarySource(const HTTPDictionarySource & other);
BlockInputStreamPtr loadAll() override;
BlockInputStreamPtr loadIds(const std::vector<UInt64> & ids) override;
BlockInputStreamPtr loadKeys(
const ConstColumnPlainPtrs & key_columns, const std::vector<std::size_t> & requested_rows) override;
bool isModified() const override;
bool supportsSelectiveLoad() const override;
DictionarySourcePtr clone() const override;
std::string toString() const override;
private:
Logger * log = &Logger::get("HTTPDictionarySource");
LocalDateTime getLastModification() const;
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const DictionaryStructure dict_struct;
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const std::string url;
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const std::string format;
Block sample_block;
const Context & context;
};
}