mirror of
https://github.com/ClickHouse/ClickHouse.git
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290 lines
9.9 KiB
C++
290 lines
9.9 KiB
C++
#pragma once
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#include <atomic>
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#include <memory>
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#include <variant>
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#include <Columns/ColumnDecimal.h>
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#include <Columns/ColumnString.h>
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#include <Core/Block.h>
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#include <Common/HashTable/HashMap.h>
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#include <sparsehash/sparse_hash_map>
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#include <ext/range.h>
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#include "DictionaryStructure.h"
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#include "IDictionary.h"
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#include "IDictionarySource.h"
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/** This dictionary stores all content in a hash table in memory
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* (a separate Key -> Value map for each attribute)
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* Two variants of hash table are supported: a fast HashMap and memory efficient sparse_hash_map.
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*/
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namespace DB
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{
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using BlockPtr = std::shared_ptr<Block>;
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class HashedDictionary final : public IDictionary
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{
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public:
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HashedDictionary(
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const std::string & database_,
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const std::string & name_,
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const DictionaryStructure & dict_struct_,
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DictionarySourcePtr source_ptr_,
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const DictionaryLifetime dict_lifetime_,
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bool require_nonempty_,
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bool sparse_,
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BlockPtr saved_block_ = nullptr);
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const std::string & getDatabase() const override { return database; }
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const std::string & getName() const override { return name; }
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const std::string & getFullName() const override { return full_name; }
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std::string getTypeName() const override { return sparse ? "SparseHashed" : "Hashed"; }
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size_t getBytesAllocated() const override { return bytes_allocated; }
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size_t getQueryCount() const override { return query_count.load(std::memory_order_relaxed); }
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double getHitRate() const override { return 1.0; }
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size_t getElementCount() const override { return element_count; }
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double getLoadFactor() const override { return static_cast<double>(element_count) / bucket_count; }
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std::shared_ptr<const IExternalLoadable> clone() const override
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{
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return std::make_shared<HashedDictionary>(database, name, dict_struct, source_ptr->clone(), dict_lifetime, require_nonempty, sparse, saved_block);
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}
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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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const DictionaryStructure & getStructure() const override { return dict_struct; }
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bool isInjective(const std::string & attribute_name) const override
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{
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return dict_struct.attributes[&getAttribute(attribute_name) - attributes.data()].injective;
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}
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bool hasHierarchy() const override { return hierarchical_attribute; }
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void toParent(const PaddedPODArray<Key> & ids, PaddedPODArray<Key> & out) const override;
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template <typename T>
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using ResultArrayType = std::conditional_t<IsDecimalNumber<T>, DecimalPaddedPODArray<T>, PaddedPODArray<T>>;
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#define DECLARE(TYPE) \
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void get##TYPE(const std::string & attribute_name, const PaddedPODArray<Key> & ids, ResultArrayType<TYPE> & out) const;
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DECLARE(UInt8)
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DECLARE(UInt16)
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DECLARE(UInt32)
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DECLARE(UInt64)
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DECLARE(UInt128)
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DECLARE(Int8)
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DECLARE(Int16)
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DECLARE(Int32)
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DECLARE(Int64)
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DECLARE(Float32)
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DECLARE(Float64)
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DECLARE(Decimal32)
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DECLARE(Decimal64)
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DECLARE(Decimal128)
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#undef DECLARE
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void getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, ColumnString * out) const;
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#define DECLARE(TYPE) \
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void get##TYPE( \
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const std::string & attribute_name, \
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const PaddedPODArray<Key> & ids, \
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const PaddedPODArray<TYPE> & def, \
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ResultArrayType<TYPE> & out) const;
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DECLARE(UInt8)
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DECLARE(UInt16)
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DECLARE(UInt32)
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DECLARE(UInt64)
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DECLARE(UInt128)
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DECLARE(Int8)
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DECLARE(Int16)
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DECLARE(Int32)
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DECLARE(Int64)
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DECLARE(Float32)
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DECLARE(Float64)
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DECLARE(Decimal32)
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DECLARE(Decimal64)
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DECLARE(Decimal128)
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#undef DECLARE
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void
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getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const ColumnString * const def, ColumnString * const out)
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const;
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#define DECLARE(TYPE) \
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void get##TYPE(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const TYPE & def, ResultArrayType<TYPE> & out) \
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const;
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DECLARE(UInt8)
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DECLARE(UInt16)
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DECLARE(UInt32)
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DECLARE(UInt64)
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DECLARE(UInt128)
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DECLARE(Int8)
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DECLARE(Int16)
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DECLARE(Int32)
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DECLARE(Int64)
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DECLARE(Float32)
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DECLARE(Float64)
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DECLARE(Decimal32)
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DECLARE(Decimal64)
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DECLARE(Decimal128)
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#undef DECLARE
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void getString(const std::string & attribute_name, const PaddedPODArray<Key> & ids, const String & def, ColumnString * const out) const;
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void has(const PaddedPODArray<Key> & ids, PaddedPODArray<UInt8> & out) const override;
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void isInVectorVector(
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const PaddedPODArray<Key> & child_ids, const PaddedPODArray<Key> & ancestor_ids, PaddedPODArray<UInt8> & out) const override;
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void isInVectorConstant(const PaddedPODArray<Key> & child_ids, const Key ancestor_id, PaddedPODArray<UInt8> & out) const override;
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void isInConstantVector(const Key child_id, const PaddedPODArray<Key> & ancestor_ids, PaddedPODArray<UInt8> & out) const override;
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BlockInputStreamPtr getBlockInputStream(const Names & column_names, size_t max_block_size) const override;
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private:
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template <typename Value>
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using CollectionType = HashMap<UInt64, Value>;
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template <typename Value>
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using CollectionPtrType = std::unique_ptr<CollectionType<Value>>;
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template <typename Value>
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using SparseCollectionType = google::sparse_hash_map<UInt64, Value, DefaultHash<UInt64>>;
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template <typename Value>
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using SparseCollectionPtrType = std::unique_ptr<SparseCollectionType<Value>>;
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struct Attribute final
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{
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AttributeUnderlyingType type;
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std::variant<
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UInt8,
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UInt16,
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UInt32,
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UInt64,
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UInt128,
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Int8,
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Int16,
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Int32,
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Int64,
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Decimal32,
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Decimal64,
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Decimal128,
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Float32,
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Float64,
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String>
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null_values;
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std::variant<
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CollectionPtrType<UInt8>,
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CollectionPtrType<UInt16>,
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CollectionPtrType<UInt32>,
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CollectionPtrType<UInt64>,
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CollectionPtrType<UInt128>,
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CollectionPtrType<Int8>,
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CollectionPtrType<Int16>,
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CollectionPtrType<Int32>,
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CollectionPtrType<Int64>,
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CollectionPtrType<Decimal32>,
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CollectionPtrType<Decimal64>,
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CollectionPtrType<Decimal128>,
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CollectionPtrType<Float32>,
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CollectionPtrType<Float64>,
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CollectionPtrType<StringRef>>
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maps;
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std::variant<
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SparseCollectionPtrType<UInt8>,
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SparseCollectionPtrType<UInt16>,
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SparseCollectionPtrType<UInt32>,
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SparseCollectionPtrType<UInt64>,
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SparseCollectionPtrType<UInt128>,
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SparseCollectionPtrType<Int8>,
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SparseCollectionPtrType<Int16>,
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SparseCollectionPtrType<Int32>,
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SparseCollectionPtrType<Int64>,
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SparseCollectionPtrType<Decimal32>,
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SparseCollectionPtrType<Decimal64>,
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SparseCollectionPtrType<Decimal128>,
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SparseCollectionPtrType<Float32>,
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SparseCollectionPtrType<Float64>,
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SparseCollectionPtrType<StringRef>>
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sparse_maps;
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std::unique_ptr<Arena> string_arena;
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};
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void createAttributes();
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void blockToAttributes(const Block & block);
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void updateData();
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void loadData();
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template <typename T>
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void addAttributeSize(const Attribute & attribute);
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void calculateBytesAllocated();
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template <typename T>
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void createAttributeImpl(Attribute & attribute, const Field & null_value);
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Attribute createAttributeWithType(const AttributeUnderlyingType type, const Field & null_value);
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template <typename OutputType, typename AttrType, typename ValueSetter, typename DefaultGetter>
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void getItemsAttrImpl(
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const AttrType & attr, const PaddedPODArray<Key> & ids, ValueSetter && set_value, DefaultGetter && get_default) const;
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template <typename AttributeType, typename OutputType, typename ValueSetter, typename DefaultGetter>
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void getItemsImpl(
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const Attribute & attribute, const PaddedPODArray<Key> & ids, ValueSetter && set_value, DefaultGetter && get_default) const;
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template <typename T>
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bool setAttributeValueImpl(Attribute & attribute, const Key id, const T value);
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bool setAttributeValue(Attribute & attribute, const Key id, const Field & value);
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const Attribute & getAttribute(const std::string & attribute_name) const;
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template <typename T>
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void has(const Attribute & attribute, const PaddedPODArray<Key> & ids, PaddedPODArray<UInt8> & out) const;
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template <typename T, typename AttrType>
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PaddedPODArray<Key> getIdsAttrImpl(const AttrType & attr) const;
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template <typename T>
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PaddedPODArray<Key> getIds(const Attribute & attribute) const;
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PaddedPODArray<Key> getIds() const;
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template <typename AttrType, typename ChildType, typename AncestorType>
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void isInAttrImpl(const AttrType & attr, const ChildType & child_ids, const AncestorType & ancestor_ids, PaddedPODArray<UInt8> & out) const;
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template <typename ChildType, typename AncestorType>
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void isInImpl(const ChildType & child_ids, const AncestorType & ancestor_ids, PaddedPODArray<UInt8> & out) const;
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const std::string database;
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const std::string name;
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const std::string full_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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const bool require_nonempty;
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const bool sparse;
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std::map<std::string, size_t> attribute_index_by_name;
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std::vector<Attribute> attributes;
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const Attribute * hierarchical_attribute = nullptr;
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size_t bytes_allocated = 0;
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size_t element_count = 0;
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size_t bucket_count = 0;
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mutable std::atomic<size_t> query_count{0};
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BlockPtr saved_block;
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};
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}
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