mirror of
https://github.com/ClickHouse/ClickHouse.git
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88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
#pragma once
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#include <IO/ConnectionTimeouts.h>
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#include <Poco/Data/SessionPool.h>
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#include <Poco/URI.h>
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#include <Common/XDBCBridgeHelper.h>
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#include "DictionaryStructure.h"
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#include "ExternalQueryBuilder.h"
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#include "IDictionarySource.h"
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namespace Poco
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{
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namespace Util
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{
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class AbstractConfiguration;
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}
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class Logger;
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}
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namespace DB
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{
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/// Allows loading dictionaries from a XDBC source via bridges
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class XDBCDictionarySource final : public IDictionarySource
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{
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public:
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XDBCDictionarySource(
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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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const Block & sample_block_,
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const Context & context_,
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BridgeHelperPtr bridge);
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/// copy-constructor is provided in order to support cloneability
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XDBCDictionarySource(const XDBCDictionarySource & other);
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XDBCDictionarySource & operator=(const XDBCDictionarySource &) = delete;
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BlockInputStreamPtr loadAll() override;
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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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std::string getUpdateFieldAndDate();
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// execute invalidate_query. expects single cell in result
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std::string doInvalidateQuery(const std::string & request) const;
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BlockInputStreamPtr loadBase(const std::string & query) const;
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Poco::Logger * log;
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std::chrono::time_point<std::chrono::system_clock> update_time;
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const DictionaryStructure dict_struct;
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const std::string db;
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const std::string table;
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const std::string where;
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const std::string update_field;
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Block sample_block;
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ExternalQueryBuilder query_builder;
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const std::string load_all_query;
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std::string invalidate_query;
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mutable std::string invalidate_query_response;
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BridgeHelperPtr bridge_helper;
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Poco::URI bridge_url;
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ConnectionTimeouts timeouts;
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const Context & global_context;
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};
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}
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