mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 05:30:51 +00:00
d36f52502e
It's still hackish and dirty, but server and client compies. Server starts, but throwes meaningless exception on any query. Client seems to be working fine. Linux compilation might (but shouldn't) be broken (not tested).
87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
#pragma once
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#include <DB/Core/Field.h>
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#include <DB/Core/StringRef.h>
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#include <Poco/Util/XMLConfiguration.h>
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#include <DB/Common/PODArray.h>
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#include <memory>
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#include <chrono>
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namespace DB
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{
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class IDictionarySource;
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struct IDictionaryBase;
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using DictionaryPtr = std::unique_ptr<IDictionaryBase>;
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struct DictionaryLifetime;
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struct DictionaryStructure;
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class ColumnString;
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struct IDictionaryBase
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{
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using Key = UInt64;
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virtual std::exception_ptr getCreationException() const = 0;
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virtual std::string getName() const = 0;
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virtual std::string getTypeName() const = 0;
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virtual std::size_t getBytesAllocated() const = 0;
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virtual std::size_t getQueryCount() const = 0;
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virtual double getHitRate() const = 0;
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virtual std::size_t getElementCount() const = 0;
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virtual double getLoadFactor() const = 0;
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virtual bool isCached() const = 0;
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virtual DictionaryPtr clone() const = 0;
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virtual const IDictionarySource * getSource() const = 0;
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virtual const DictionaryLifetime & getLifetime() const = 0;
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virtual const DictionaryStructure & getStructure() const = 0;
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virtual std::chrono::time_point<std::chrono::system_clock> getCreationTime() const = 0;
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virtual bool isInjective(const std::string & attribute_name) const = 0;
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virtual ~IDictionaryBase() = default;
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};
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struct IDictionary : IDictionaryBase
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{
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virtual bool hasHierarchy() const = 0;
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virtual void toParent(const PaddedPODArray<Key> & ids, PaddedPODArray<Key> & out) const = 0;
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virtual void has(const PaddedPODArray<Key> & ids, PaddedPODArray<UInt8> & out) const = 0;
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/// do not call unless you ensure that hasHierarchy() returns true
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Key toParent(Key id) const
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{
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const PaddedPODArray<UInt64> ids(1, id);
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PaddedPODArray<UInt64> out(1);
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toParent(ids, out);
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return out.front();
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}
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bool in(Key child_id, const Key ancestor_id) const
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{
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while (child_id != 0 && child_id != ancestor_id)
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child_id = toParent(child_id);
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return child_id != 0;
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}
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};
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}
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