mirror of
https://github.com/ClickHouse/ClickHouse.git
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96 lines
3.8 KiB
C++
96 lines
3.8 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 <memory>
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#include <Poco/Util/XMLConfiguration.h>
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namespace DB
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{
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class IDictionarySource;
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class IDictionary;
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using DictionaryPtr = std::unique_ptr<IDictionary>;
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class DictionaryLifetime;
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class IDictionary
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{
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public:
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using id_t = std::uint64_t;
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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 bool isCached() const = 0;
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virtual void reload() {}
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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 bool hasHierarchy() const = 0;
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/// do not call unless you ensure that hasHierarchy() returns true
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virtual id_t toParent(id_t id) const = 0;
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bool in(id_t child_id, const id_t 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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/// safe and slow functions, perform map lookup and type checks
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virtual UInt8 getUInt8(const std::string & attribute_name, id_t id) const = 0;
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virtual UInt16 getUInt16(const std::string & attribute_name, id_t id) const = 0;
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virtual UInt32 getUInt32(const std::string & attribute_name, id_t id) const = 0;
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virtual UInt64 getUInt64(const std::string & attribute_name, id_t id) const = 0;
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virtual Int8 getInt8(const std::string & attribute_name, id_t id) const = 0;
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virtual Int16 getInt16(const std::string & attribute_name, id_t id) const = 0;
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virtual Int32 getInt32(const std::string & attribute_name, id_t id) const = 0;
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virtual Int64 getInt64(const std::string & attribute_name, id_t id) const = 0;
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virtual Float32 getFloat32(const std::string & attribute_name, id_t id) const = 0;
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virtual Float64 getFloat64(const std::string & attribute_name, id_t id) const = 0;
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virtual StringRef getString(const std::string & attribute_name, id_t id) const = 0;
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/// unsafe functions for maximum performance, you are on your own ensuring type-safety
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/// returns persistent attribute index for usage with following functions
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virtual std::size_t getAttributeIndex(const std::string & attribute_name) const = 0;
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/// type-checking functions
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virtual bool isUInt8(std::size_t attribute_idx) const = 0;
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virtual bool isUInt16(std::size_t attribute_idx) const = 0;
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virtual bool isUInt32(std::size_t attribute_idx) const = 0;
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virtual bool isUInt64(std::size_t attribute_idx) const = 0;
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virtual bool isInt8(std::size_t attribute_idx) const = 0;
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virtual bool isInt16(std::size_t attribute_idx) const = 0;
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virtual bool isInt32(std::size_t attribute_idx) const = 0;
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virtual bool isInt64(std::size_t attribute_idx) const = 0;
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virtual bool isFloat32(std::size_t attribute_idx) const = 0;
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virtual bool isFloat64(std::size_t attribute_idx) const = 0;
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virtual bool isString(std::size_t attribute_idx) const = 0;
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/// plain load from target container without any checks
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virtual UInt8 getUInt8Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual UInt16 getUInt16Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual UInt32 getUInt32Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual UInt64 getUInt64Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Int8 getInt8Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Int16 getInt16Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Int32 getInt32Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Int64 getInt64Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Float32 getFloat32Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual Float64 getFloat64Unsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual StringRef getStringUnsafe(std::size_t attribute_idx, id_t id) const = 0;
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virtual ~IDictionary() = default;
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};
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}
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