mirror of
https://github.com/ClickHouse/ClickHouse.git
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364 lines
12 KiB
C++
364 lines
12 KiB
C++
#pragma once
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#include <DB/Dictionaries/IDictionary.h>
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#include <DB/Dictionaries/IDictionarySource.h>
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#include <DB/Dictionaries/DictionaryStructure.h>
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#include <DB/Columns/ColumnString.h>
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#include <statdaemons/ext/range.hpp>
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#include <vector>
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#include <tuple>
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namespace DB
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{
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const auto initial_array_size = 1024;
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const auto max_array_size = 500000;
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class FlatDictionary final : public IDictionary
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{
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public:
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FlatDictionary(const std::string & name, const DictionaryStructure & dict_struct,
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DictionarySourcePtr source_ptr, const DictionaryLifetime dict_lifetime)
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: name{name}, dict_struct(dict_struct),
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source_ptr{std::move(source_ptr)}, dict_lifetime(dict_lifetime)
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{
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createAttributes();
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loadData();
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}
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FlatDictionary(const FlatDictionary & other)
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: FlatDictionary{other.name, other.dict_struct, other.source_ptr->clone(), other.dict_lifetime}
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{}
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std::string getName() const override { return name; }
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std::string getTypeName() const override { return "FlatDictionary"; }
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bool isCached() const override { return false; }
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DictionaryPtr clone() const override { return std::make_unique<FlatDictionary>(*this); }
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const IDictionarySource * getSource() const override { return source_ptr.get(); }
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const DictionaryLifetime & getLifetime() const override { return dict_lifetime; }
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bool hasHierarchy() const override { return hierarchical_attribute; }
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id_t toParent(const id_t id) const override
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{
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const auto attr = hierarchical_attribute;
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const auto & array = *std::get<std::unique_ptr<PODArray<UInt64>>>(attr->arrays);
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return id < array.size() ? array[id] : std::get<UInt64>(attr->null_values);
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}
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void toParent(const PODArray<id_t> & ids, PODArray<id_t> & out) const override
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{
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getItems<UInt64>(*hierarchical_attribute, ids, out);
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}
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#define DECLARE_INDIVIDUAL_GETTER(TYPE, LC_TYPE) \
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TYPE get##TYPE(const std::string & attribute_name, const id_t id) const override\
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{\
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const auto & attribute = getAttribute(attribute_name);\
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if (attribute.type != AttributeType::LC_TYPE)\
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throw Exception{\
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"Type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),\
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ErrorCodes::TYPE_MISMATCH\
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};\
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\
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const auto & array = *std::get<std::unique_ptr<PODArray<TYPE>>>(attribute.arrays);\
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\
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return id < array.size() ? array[id] : std::get<TYPE>(attribute.null_values);\
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}
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DECLARE_INDIVIDUAL_GETTER(UInt8, uint8)
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DECLARE_INDIVIDUAL_GETTER(UInt16, uint16)
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DECLARE_INDIVIDUAL_GETTER(UInt32, uint32)
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DECLARE_INDIVIDUAL_GETTER(UInt64, uint64)
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DECLARE_INDIVIDUAL_GETTER(Int8, int8)
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DECLARE_INDIVIDUAL_GETTER(Int16, int16)
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DECLARE_INDIVIDUAL_GETTER(Int32, int32)
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DECLARE_INDIVIDUAL_GETTER(Int64, int64)
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DECLARE_INDIVIDUAL_GETTER(Float32, float32)
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DECLARE_INDIVIDUAL_GETTER(Float64, float64)
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#undef DECLARE_INDIVIDUAL_GETTER
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String getString(const std::string & attribute_name, const id_t id) const override
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{
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const auto & attribute = getAttribute(attribute_name);
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if (attribute.type != AttributeType::string)
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throw Exception{
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"Type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),
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ErrorCodes::TYPE_MISMATCH
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};
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const auto & array = *std::get<std::unique_ptr<PODArray<StringRef>>>(attribute.arrays);
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return id < array.size() ? String{array[id]} : std::get<String>(attribute.null_values);
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}
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#define DECLARE_MULTIPLE_GETTER(TYPE, LC_TYPE)\
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void get##TYPE(const std::string & attribute_name, const PODArray<id_t> & ids, PODArray<TYPE> & out) const override\
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{\
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const auto & attribute = getAttribute(attribute_name);\
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if (attribute.type != AttributeType::LC_TYPE)\
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throw Exception{\
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"Type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),\
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ErrorCodes::TYPE_MISMATCH\
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};\
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\
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getItems<TYPE>(attribute, ids, out);\
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}
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DECLARE_MULTIPLE_GETTER(UInt8, uint8)
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DECLARE_MULTIPLE_GETTER(UInt16, uint16)
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DECLARE_MULTIPLE_GETTER(UInt32, uint32)
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DECLARE_MULTIPLE_GETTER(UInt64, uint64)
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DECLARE_MULTIPLE_GETTER(Int8, int8)
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DECLARE_MULTIPLE_GETTER(Int16, int16)
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DECLARE_MULTIPLE_GETTER(Int32, int32)
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DECLARE_MULTIPLE_GETTER(Int64, int64)
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DECLARE_MULTIPLE_GETTER(Float32, float32)
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DECLARE_MULTIPLE_GETTER(Float64, float64)
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#undef DECLARE_MULTIPLE_GETTER
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void getString(const std::string & attribute_name, const PODArray<id_t> & ids, ColumnString * out) const override
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{
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const auto & attribute = getAttribute(attribute_name);
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if (attribute.type != AttributeType::string)
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throw Exception{
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"Type mismatch: attribute " + attribute_name + " has type " + toString(attribute.type),
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ErrorCodes::TYPE_MISMATCH
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};
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const auto & attr = *std::get<std::unique_ptr<PODArray<StringRef>>>(attribute.arrays);
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const auto & null_value = std::get<String>(attribute.null_values);
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for (const auto i : ext::range(0, ids.size()))
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{
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const auto id = ids[i];
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const auto string_ref = id < attr.size() ? attr[id] : StringRef{null_value};
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out->insertData(string_ref.data, string_ref.size);
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}
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}
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private:
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struct attribute_t final
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{
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AttributeType type;
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std::tuple<UInt8, UInt16, UInt32, UInt64,
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Int8, Int16, Int32, Int64,
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Float32, Float64,
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String> null_values;
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std::tuple<std::unique_ptr<PODArray<UInt8>>,
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std::unique_ptr<PODArray<UInt16>>,
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std::unique_ptr<PODArray<UInt32>>,
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std::unique_ptr<PODArray<UInt64>>,
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std::unique_ptr<PODArray<Int8>>,
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std::unique_ptr<PODArray<Int16>>,
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std::unique_ptr<PODArray<Int32>>,
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std::unique_ptr<PODArray<Int64>>,
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std::unique_ptr<PODArray<Float32>>,
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std::unique_ptr<PODArray<Float64>>,
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std::unique_ptr<PODArray<StringRef>>> arrays;
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std::unique_ptr<Arena> string_arena;
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};
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void createAttributes()
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{
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const auto size = dict_struct.attributes.size();
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attributes.reserve(size);
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for (const auto & attribute : dict_struct.attributes)
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{
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attribute_index_by_name.emplace(attribute.name, attributes.size());
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attributes.push_back(createAttributeWithType(getAttributeTypeByName(attribute.type),
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attribute.null_value));
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if (attribute.hierarchical)
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{
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hierarchical_attribute = &attributes.back();
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if (hierarchical_attribute->type != AttributeType::uint64)
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throw Exception{
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"Hierarchical attribute must be UInt64.",
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ErrorCodes::TYPE_MISMATCH
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};
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}
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}
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}
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void loadData()
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{
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auto stream = source_ptr->loadAll();
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stream->readPrefix();
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while (const auto block = stream->read())
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{
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const auto & id_column = *block.getByPosition(0).column;
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for (const auto attribute_idx : ext::range(0, attributes.size()))
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{
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const auto & attribute_column = *block.getByPosition(attribute_idx + 1).column;
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auto & attribute = attributes[attribute_idx];
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for (const auto row_idx : ext::range(0, id_column.size()))
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setAttributeValue(attribute, id_column[row_idx].get<UInt64>(), attribute_column[row_idx]);
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}
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}
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stream->readSuffix();
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}
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template <typename T>
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void createAttributeImpl(attribute_t & attribute, const std::string & null_value)
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{
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const auto & null_value_ref = std::get<T>(attribute.null_values) = DB::parse<T>(null_value);
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std::get<std::unique_ptr<PODArray<T>>>(attribute.arrays) =
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std::make_unique<PODArray<T>>(initial_array_size, null_value_ref);
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}
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attribute_t createAttributeWithType(const AttributeType type, const std::string & null_value)
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{
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attribute_t attr{type};
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switch (type)
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{
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case AttributeType::uint8: createAttributeImpl<UInt8>(attr, null_value); break;
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case AttributeType::uint16: createAttributeImpl<UInt16>(attr, null_value); break;
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case AttributeType::uint32: createAttributeImpl<UInt32>(attr, null_value); break;
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case AttributeType::uint64: createAttributeImpl<UInt64>(attr, null_value); break;
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case AttributeType::int8: createAttributeImpl<Int8>(attr, null_value); break;
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case AttributeType::int16: createAttributeImpl<Int16>(attr, null_value); break;
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case AttributeType::int32: createAttributeImpl<Int32>(attr, null_value); break;
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case AttributeType::int64: createAttributeImpl<Int64>(attr, null_value); break;
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case AttributeType::float32: createAttributeImpl<Float32>(attr, null_value); break;
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case AttributeType::float64: createAttributeImpl<Float64>(attr, null_value); break;
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case AttributeType::string:
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{
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const auto & null_value_ref = std::get<String>(attr.null_values) = DB::parse<String>(null_value);
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std::get<std::unique_ptr<PODArray<StringRef>>>(attr.arrays) =
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std::make_unique<PODArray<StringRef>>(initial_array_size, null_value_ref);
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attr.string_arena = std::make_unique<Arena>();
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break;
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}
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};
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return attr;
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}
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template <typename T>
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void getItems(const attribute_t & attribute, const PODArray<id_t> & ids, PODArray<T> & out) const
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{
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const auto & attr = *std::get<std::unique_ptr<PODArray<T>>>(attribute.arrays);
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const auto null_value = std::get<T>(attribute.null_values);
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for (const auto i : ext::range(0, ids.size()))
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{
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const auto id = ids[i];
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out[i] = id < attr.size() ? attr[id] : null_value;
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}
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}
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template <typename T>
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void setAttributeValueImpl(attribute_t & attribute, const id_t id, const T value)
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{
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auto & array = *std::get<std::unique_ptr<PODArray<T>>>(attribute.arrays);
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if (id >= array.size())
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array.resize_fill(id, std::get<T>(attribute.null_values));
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array[id] = value;
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}
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void setAttributeValue(attribute_t & attribute, const id_t id, const Field & value)
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{
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if (id >= max_array_size)
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throw Exception{
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"Identifier should be less than " + toString(max_array_size),
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ErrorCodes::ARGUMENT_OUT_OF_BOUND
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};
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switch (attribute.type)
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{
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case AttributeType::uint8:
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{
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setAttributeValueImpl<UInt8>(attribute, id, value.get<UInt64>());
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break;
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}
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case AttributeType::uint16:
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{
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setAttributeValueImpl<UInt16>(attribute, id, value.get<UInt64>());
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break;
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}
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case AttributeType::uint32:
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{
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setAttributeValueImpl<UInt32>(attribute, id, value.get<UInt64>());
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break;
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}
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case AttributeType::uint64:
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{
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setAttributeValueImpl<UInt64>(attribute, id, value.get<UInt64>());
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break;
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}
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case AttributeType::int8:
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{
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setAttributeValueImpl<Int8>(attribute, id, value.get<Int64>());
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break;
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}
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case AttributeType::int16:
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{
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setAttributeValueImpl<Int16>(attribute, id, value.get<Int64>());
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break;
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}
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case AttributeType::int32:
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{
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setAttributeValueImpl<Int32>(attribute, id, value.get<Int64>());
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break;
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}
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case AttributeType::int64:
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{
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setAttributeValueImpl<Int64>(attribute, id, value.get<Int64>());
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break;
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}
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case AttributeType::float32:
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{
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setAttributeValueImpl<Float32>(attribute, id, value.get<Float64>());
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break;
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}
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case AttributeType::float64:
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{
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setAttributeValueImpl<Float64>(attribute, id, value.get<Float64>());
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break;
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}
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case AttributeType::string:
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{
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auto & array = *std::get<std::unique_ptr<PODArray<StringRef>>>(attribute.arrays);
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if (id >= array.size())
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array.resize_fill(id, std::get<String>(attribute.null_values));
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const auto & string = value.get<String>();
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const auto string_in_arena = attribute.string_arena->insert(string.data(), string.size());
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array[id] = StringRef{string_in_arena, string.size()};
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break;
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}
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}
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}
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const attribute_t & getAttribute(const std::string & attribute_name) const
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{
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const auto it = attribute_index_by_name.find(attribute_name);
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if (it == std::end(attribute_index_by_name))
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throw Exception{
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"No such attribute '" + attribute_name + "'",
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ErrorCodes::BAD_ARGUMENTS
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};
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return attributes[it->second];
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}
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const std::string name;
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const DictionaryStructure dict_struct;
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const DictionarySourcePtr source_ptr;
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const DictionaryLifetime dict_lifetime;
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std::map<std::string, std::size_t> attribute_index_by_name;
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std::vector<attribute_t> attributes;
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const attribute_t * hierarchical_attribute = nullptr;
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};
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}
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