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Merge
This commit is contained in:
Evgeniy Gatov
commit
7b949ef7ec
@ -77,7 +77,7 @@ template <> struct CompareHelper<Float64> : public FloatCompareHelper<Float64> {
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/** Шаблон столбцов, которые используют для хранения простой массив.
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*/
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template <typename T>
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class ColumnVector : public IColumn
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class ColumnVector final : public IColumn
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{
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private:
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typedef ColumnVector<T> Self;
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@ -69,3 +69,4 @@
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#define DBMS_DISTRIBUTED_DIRECTORY_MONITOR_SLEEP_TIME_MS 100
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#define ALWAYS_INLINE __attribute__((__always_inline__))
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#define NO_INLINE __attribute__((__noinline__))
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@ -22,6 +22,7 @@
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#include <DB/Columns/ColumnString.h>
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#include <DB/Columns/ColumnFixedString.h>
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#include <DB/Columns/ColumnAggregateFunction.h>
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#include <DB/Columns/ColumnVector.h>
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@ -53,25 +54,59 @@ typedef HashMap<UInt128, AggregateDataPtr, UInt128Hash> AggregatedDataWithKeys12
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typedef HashMap<UInt128, std::pair<StringRef*, AggregateDataPtr>, UInt128TrivialHash> AggregatedDataHashed;
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/// Для случая, когда есть один числовой ключ.
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struct AggregationMethodKey64
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/// Специализации для UInt8, UInt16.
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struct TrivialHash
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{
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typedef AggregatedDataWithUInt64Key Data;
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typedef Data::key_type Key;
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typedef Data::mapped_type Mapped;
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typedef Data::iterator iterator;
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typedef Data::const_iterator const_iterator;
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template <typename T>
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size_t operator() (T key) const
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{
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return key;
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}
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};
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/// Превращает хэш-таблицу в что-то типа lookup-таблицы. Остаётся неоптимальность - в ячейках хранятся ключи.
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template <size_t key_bits>
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struct HashTableFixedGrower
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{
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size_t bufSize() const { return 1 << key_bits; }
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size_t mask() const { return bufSize() - 1; }
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size_t place(size_t x) const { return x; }
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size_t next(size_t pos) const { __builtin_unreachable(); return pos; }
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bool overflow(size_t elems) const { return false; }
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void increaseSize() { __builtin_unreachable(); }
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void set(size_t num_elems) {}
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void setBufSize(size_t buf_size_) {}
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};
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typedef HashMap<UInt64, AggregateDataPtr, TrivialHash, HashTableFixedGrower<8>> AggregatedDataWithUInt8Key;
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typedef HashMap<UInt64, AggregateDataPtr, TrivialHash, HashTableFixedGrower<16>> AggregatedDataWithUInt16Key;
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template <typename FieldType> struct AggregatedDataWithUIntKey { using Type = AggregatedDataWithUInt64Key; };
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template <> struct AggregatedDataWithUIntKey<UInt8> { using Type = AggregatedDataWithUInt8Key; };
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template <> struct AggregatedDataWithUIntKey<UInt16> { using Type = AggregatedDataWithUInt16Key; };
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/// Для случая, когда есть один числовой ключ.
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template <typename FieldType> /// UInt8/16/32/64 для любых типов соответствующей битности.
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struct AggregationMethodOneNumber
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{
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typedef typename AggregatedDataWithUIntKey<FieldType>::Type Data;
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typedef typename Data::key_type Key;
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typedef typename Data::mapped_type Mapped;
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typedef typename Data::iterator iterator;
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typedef typename Data::const_iterator const_iterator;
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Data data;
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const IColumn * column;
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const ColumnVector<FieldType> * column;
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/** Вызывается в начале обработки каждого блока.
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* Устанавливает переменные, необходимые для остальных методов, вызываемых во внутренних циклах.
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*/
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void init(ConstColumnPlainPtrs & key_columns)
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{
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column = key_columns[0];
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column = static_cast<const ColumnVector<FieldType> *>(key_columns[0]);
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}
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/// Достать из ключевых столбцов ключ для вставки в хэш-таблицу.
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@ -99,7 +134,7 @@ struct AggregationMethodKey64
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*/
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static void insertKeyIntoColumns(const_iterator & it, ColumnPlainPtrs & key_columns, size_t keys_size, const Sizes & key_sizes)
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{
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key_columns[0]->insertData(reinterpret_cast<const char *>(&it->first), sizeof(it->first));
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static_cast<ColumnVector<FieldType> *>(key_columns[0])->insertData(reinterpret_cast<const char *>(&it->first), sizeof(it->first));
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}
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};
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@ -317,7 +352,10 @@ struct AggregatedDataVariants : private boost::noncopyable
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*/
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AggregatedDataWithoutKey without_key = nullptr;
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std::unique_ptr<AggregationMethodKey64> key64;
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std::unique_ptr<AggregationMethodOneNumber<UInt8>> key8;
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std::unique_ptr<AggregationMethodOneNumber<UInt16>> key16;
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std::unique_ptr<AggregationMethodOneNumber<UInt32>> key32;
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std::unique_ptr<AggregationMethodOneNumber<UInt64>> key64;
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std::unique_ptr<AggregationMethodString> key_string;
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std::unique_ptr<AggregationMethodFixedString> key_fixed_string;
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std::unique_ptr<AggregationMethodKeys128> keys128;
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@ -326,12 +364,15 @@ struct AggregatedDataVariants : private boost::noncopyable
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enum Type
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{
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EMPTY = 0,
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WITHOUT_KEY = 1,
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KEY_64 = 2,
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KEY_STRING = 3,
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KEY_FIXED_STRING = 4,
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KEYS_128 = 5,
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HASHED = 6,
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WITHOUT_KEY,
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KEY_8,
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KEY_16,
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KEY_32,
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KEY_64,
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KEY_STRING,
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KEY_FIXED_STRING,
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KEYS_128,
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HASHED,
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};
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Type type = EMPTY;
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@ -348,11 +389,14 @@ struct AggregatedDataVariants : private boost::noncopyable
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{
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case EMPTY: break;
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case WITHOUT_KEY: break;
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case KEY_64: key64 .reset(new AggregationMethodKey64); break;
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case KEY_STRING: key_string .reset(new AggregationMethodString); break;
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case KEY_FIXED_STRING: key_fixed_string.reset(new AggregationMethodFixedString); break;
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case KEYS_128: keys128 .reset(new AggregationMethodKeys128); break;
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case HASHED: hashed .reset(new AggregationMethodHashed); break;
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case KEY_8: key8 .reset(new decltype(key8)::element_type); break;
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case KEY_16: key16 .reset(new decltype(key16)::element_type); break;
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case KEY_32: key32 .reset(new decltype(key32)::element_type); break;
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case KEY_64: key64 .reset(new decltype(key64)::element_type); break;
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case KEY_STRING: key_string .reset(new decltype(key_string)::element_type); break;
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case KEY_FIXED_STRING: key_fixed_string.reset(new decltype(key_fixed_string)::element_type); break;
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case KEYS_128: keys128 .reset(new decltype(keys128)::element_type); break;
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case HASHED: hashed .reset(new decltype(hashed)::element_type); break;
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default:
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throw Exception("Unknown aggregated data variant.", ErrorCodes::UNKNOWN_AGGREGATED_DATA_VARIANT);
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@ -365,6 +409,9 @@ struct AggregatedDataVariants : private boost::noncopyable
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{
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case EMPTY: return 0;
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case WITHOUT_KEY: return 1;
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case KEY_8: return key8->data.size() + (without_key != nullptr);
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case KEY_16: return key16->data.size() + (without_key != nullptr);
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case KEY_32: return key32->data.size() + (without_key != nullptr);
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case KEY_64: return key64->data.size() + (without_key != nullptr);
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case KEY_STRING: return key_string->data.size() + (without_key != nullptr);
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case KEY_FIXED_STRING: return key_fixed_string->data.size() + (without_key != nullptr);
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@ -382,6 +429,9 @@ struct AggregatedDataVariants : private boost::noncopyable
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{
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case EMPTY: return "EMPTY";
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case WITHOUT_KEY: return "WITHOUT_KEY";
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case KEY_8: return "KEY_8";
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case KEY_16: return "KEY_16";
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case KEY_32: return "KEY_32";
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case KEY_64: return "KEY_64";
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case KEY_STRING: return "KEY_STRING";
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case KEY_FIXED_STRING: return "KEY_FIXED_STRING";
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@ -94,6 +94,9 @@ private:
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void calculateHashesThread(Block & block, size_t begin, size_t end, ExceptionPtr & exception, MemoryTracker * memory_tracker);
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void aggregateThread(Block & block, AggregatedDataVariants & result, size_t thread_no, ExceptionPtr & exception, MemoryTracker * memory_tracker);
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void convertToBlockThread(AggregatedDataVariants & data_variant, Block & block, bool final, ExceptionPtr & exception, MemoryTracker * memory_tracker);
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template <typename FieldType>
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void aggregateOneNumber(AggregatedDataVariants & result, size_t thread_no, bool no_more_keys);
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};
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@ -7,7 +7,8 @@
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namespace DB
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{
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class StorageView : public IStorage {
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class StorageView : public IStorage
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{
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public:
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static StoragePtr create(const String & table_name_, const String & database_name_,
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@ -16,7 +17,7 @@ public:
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std::string getName() const override { return "View"; }
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std::string getTableName() const override { return table_name; }
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const NamesAndTypesList & getColumnsList() const override { return *columns; }
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DB::ASTPtr getInnerQuery() const { return inner_query.clone(); };
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ASTPtr getInnerQuery() const { return inner_query.clone(); };
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/// Пробрасывается внутрь запроса и решается на его уровне.
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bool supportsSampling() const override { return true; }
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@ -125,7 +125,18 @@ AggregatedDataVariants::Type Aggregator::chooseAggregationMethod(const ConstColu
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/// Если есть один числовой ключ, который помещается в 64 бита
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if (keys_size == 1 && key_columns[0]->isNumeric())
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{
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size_t size_of_field = key_columns[0]->sizeOfField();
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if (size_of_field == 1)
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return AggregatedDataVariants::KEY_8;
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if (size_of_field == 2)
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return AggregatedDataVariants::KEY_16;
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if (size_of_field == 4)
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return AggregatedDataVariants::KEY_32;
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if (size_of_field == 8)
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return AggregatedDataVariants::KEY_64;
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throw Exception("Logical error: numeric column has sizeOfField not in 1, 2, 4, 8.", ErrorCodes::LOGICAL_ERROR);
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}
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/// Если ключи помещаются в 128 бит, будем использовать хэш-таблицу по упакованным в 128-бит ключам
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if (keys_fit_128_bits)
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@ -167,8 +178,12 @@ void Aggregator::createAggregateStates(AggregateDataPtr & aggregate_data) const
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}
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/** Интересно - если убрать noinline, то gcc зачем-то инлайнит эту функцию, и производительность уменьшается (~10%).
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* (Возможно из-за того, что после инлайна этой функции, перестают инлайниться более внутренние функции.)
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* Инлайнить не имеет смысла, так как внутренний цикл находится целиком внутри этой функции.
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*/
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template <typename Method>
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void Aggregator::executeImpl(
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void NO_INLINE Aggregator::executeImpl(
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Method & method,
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Arena * aggregates_pool,
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size_t rows,
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@ -226,7 +241,7 @@ void Aggregator::executeImpl(
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template <typename Method>
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void Aggregator::convertToBlockImpl(
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void NO_INLINE Aggregator::convertToBlockImpl(
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Method & method,
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ColumnPlainPtrs & key_columns,
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AggregateColumnsData & aggregate_columns,
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@ -262,7 +277,7 @@ void Aggregator::convertToBlockImpl(
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template <typename Method>
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void Aggregator::mergeDataImpl(
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void NO_INLINE Aggregator::mergeDataImpl(
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Method & method_dst,
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Method & method_src) const
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{
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@ -294,7 +309,7 @@ void Aggregator::mergeDataImpl(
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template <typename Method>
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void Aggregator::mergeStreamsImpl(
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void NO_INLINE Aggregator::mergeStreamsImpl(
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Method & method,
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Arena * aggregates_pool,
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size_t start_row,
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@ -336,7 +351,7 @@ void Aggregator::mergeStreamsImpl(
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template <typename Method>
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void Aggregator::destroyImpl(
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void NO_INLINE Aggregator::destroyImpl(
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Method & method) const
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{
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for (typename Method::const_iterator it = method.data.begin(); it != method.data.end(); ++it)
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@ -372,8 +387,14 @@ bool Aggregator::executeOnBlock(Block & block, AggregatedDataVariants & result,
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/// Запоминаем столбцы, с которыми будем работать
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for (size_t i = 0; i < keys_size; ++i)
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{
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key_columns[i] = block.getByPosition(keys[i]).column;
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if (key_columns[i]->isConst())
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throw Exception("Constants is not allowed as GROUP BY keys"
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" (but all of them must be eliminated in ExpressionAnalyzer)", ErrorCodes::ILLEGAL_COLUMN);
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}
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for (size_t i = 0; i < aggregates_size; ++i)
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{
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for (size_t j = 0; j < aggregate_columns[i].size(); ++j)
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@ -434,7 +455,16 @@ bool Aggregator::executeOnBlock(Block & block, AggregatedDataVariants & result,
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AggregateDataPtr overflow_row_ptr = overflow_row ? result.without_key : nullptr;
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if (result.type == AggregatedDataVariants::KEY_64)
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if (result.type == AggregatedDataVariants::KEY_8)
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executeImpl(*result.key8, result.aggregates_pool, rows, key_columns, aggregate_columns,
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result.key_sizes, key, no_more_keys, overflow_row_ptr);
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else if (result.type == AggregatedDataVariants::KEY_16)
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executeImpl(*result.key16, result.aggregates_pool, rows, key_columns, aggregate_columns,
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result.key_sizes, key, no_more_keys, overflow_row_ptr);
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else if (result.type == AggregatedDataVariants::KEY_32)
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executeImpl(*result.key32, result.aggregates_pool, rows, key_columns, aggregate_columns,
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result.key_sizes, key, no_more_keys, overflow_row_ptr);
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else if (result.type == AggregatedDataVariants::KEY_64)
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executeImpl(*result.key64, result.aggregates_pool, rows, key_columns, aggregate_columns,
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result.key_sizes, key, no_more_keys, overflow_row_ptr);
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else if (result.type == AggregatedDataVariants::KEY_STRING)
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@ -590,7 +620,16 @@ Block Aggregator::convertToBlock(AggregatedDataVariants & data_variants, bool fi
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size_t start_row = overflow_row ? 1 : 0;
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if (data_variants.type == AggregatedDataVariants::KEY_64)
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if (data_variants.type == AggregatedDataVariants::KEY_8)
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convertToBlockImpl(*data_variants.key8, key_columns, aggregate_columns,
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final_aggregate_columns, data_variants.key_sizes, start_row, final);
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else if (data_variants.type == AggregatedDataVariants::KEY_16)
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convertToBlockImpl(*data_variants.key16, key_columns, aggregate_columns,
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final_aggregate_columns, data_variants.key_sizes, start_row, final);
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else if (data_variants.type == AggregatedDataVariants::KEY_32)
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convertToBlockImpl(*data_variants.key32, key_columns, aggregate_columns,
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final_aggregate_columns, data_variants.key_sizes, start_row, final);
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else if (data_variants.type == AggregatedDataVariants::KEY_64)
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convertToBlockImpl(*data_variants.key64, key_columns, aggregate_columns,
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final_aggregate_columns, data_variants.key_sizes, start_row, final);
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else if (data_variants.type == AggregatedDataVariants::KEY_STRING)
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@ -694,7 +733,13 @@ AggregatedDataVariantsPtr Aggregator::merge(ManyAggregatedDataVariants & data_va
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current_data = nullptr;
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}
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if (res->type == AggregatedDataVariants::KEY_64)
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if (res->type == AggregatedDataVariants::KEY_8)
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mergeDataImpl(*res->key8, *current.key8);
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else if (res->type == AggregatedDataVariants::KEY_16)
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mergeDataImpl(*res->key16, *current.key16);
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else if (res->type == AggregatedDataVariants::KEY_32)
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mergeDataImpl(*res->key32, *current.key32);
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else if (res->type == AggregatedDataVariants::KEY_64)
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mergeDataImpl(*res->key64, *current.key64);
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else if (res->type == AggregatedDataVariants::KEY_STRING)
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mergeDataImpl(*res->key_string, *current.key_string);
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@ -782,7 +827,13 @@ void Aggregator::merge(BlockInputStreamPtr stream, AggregatedDataVariants & resu
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size_t start_row = overflow_row ? 1 : 0;
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if (result.type == AggregatedDataVariants::KEY_64)
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if (result.type == AggregatedDataVariants::KEY_8)
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mergeStreamsImpl(*result.key8, result.aggregates_pool, start_row, rows, key_columns, aggregate_columns, key_sizes, key);
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else if (result.type == AggregatedDataVariants::KEY_16)
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mergeStreamsImpl(*result.key16, result.aggregates_pool, start_row, rows, key_columns, aggregate_columns, key_sizes, key);
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else if (result.type == AggregatedDataVariants::KEY_32)
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mergeStreamsImpl(*result.key32, result.aggregates_pool, start_row, rows, key_columns, aggregate_columns, key_sizes, key);
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else if (result.type == AggregatedDataVariants::KEY_64)
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mergeStreamsImpl(*result.key64, result.aggregates_pool, start_row, rows, key_columns, aggregate_columns, key_sizes, key);
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else if (result.type == AggregatedDataVariants::KEY_STRING)
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mergeStreamsImpl(*result.key_string, result.aggregates_pool, start_row, rows, key_columns, aggregate_columns, key_sizes, key);
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@ -818,7 +869,13 @@ void Aggregator::destroyAllAggregateStates(AggregatedDataVariants & result)
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aggregate_functions[i]->destroy(res_data + offsets_of_aggregate_states[i]);
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}
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if (result.type == AggregatedDataVariants::KEY_64)
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if (result.type == AggregatedDataVariants::KEY_8)
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destroyImpl(*result.key8);
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else if (result.type == AggregatedDataVariants::KEY_16)
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destroyImpl(*result.key16);
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else if (result.type == AggregatedDataVariants::KEY_32)
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destroyImpl(*result.key32);
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else if (result.type == AggregatedDataVariants::KEY_64)
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destroyImpl(*result.key64);
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||||
else if (result.type == AggregatedDataVariants::KEY_STRING)
|
||||
destroyImpl(*result.key_string);
|
||||
|
||||
@ -48,7 +48,10 @@ void SplittingAggregator::execute(BlockInputStreamPtr stream, ManyAggregatedData
|
||||
method = chooseAggregationMethod(key_columns, key_sizes);
|
||||
|
||||
/// Подготавливаем массивы, куда будут складываться ключи или хэши от ключей.
|
||||
if (method == AggregatedDataVariants::KEY_64)
|
||||
if (method == AggregatedDataVariants::KEY_8 /// TODO не использовать SplittingAggregator для маленьких ключей.
|
||||
|| method == AggregatedDataVariants::KEY_16
|
||||
|| method == AggregatedDataVariants::KEY_32
|
||||
|| method == AggregatedDataVariants::KEY_64)
|
||||
{
|
||||
keys64.resize(rows);
|
||||
}
|
||||
@ -96,7 +99,7 @@ void SplittingAggregator::execute(BlockInputStreamPtr stream, ManyAggregatedData
|
||||
|
||||
pool.wait();
|
||||
|
||||
rethrowFirstException(exceptions);
|
||||
rethrowFirstException(exceptions); /// TODO Заменить на future, packaged_task
|
||||
|
||||
/// Параллельно агрегируем в независимые хэш-таблицы
|
||||
|
||||
@ -150,14 +153,17 @@ void SplittingAggregator::calculateHashesThread(Block & block, size_t begin, siz
|
||||
|
||||
try
|
||||
{
|
||||
if (method == AggregatedDataVariants::KEY_64)
|
||||
if (method == AggregatedDataVariants::KEY_8
|
||||
|| method == AggregatedDataVariants::KEY_16
|
||||
|| method == AggregatedDataVariants::KEY_32
|
||||
|| method == AggregatedDataVariants::KEY_64)
|
||||
{
|
||||
const IColumn & column = *key_columns[0];
|
||||
|
||||
for (size_t i = begin; i < end; ++i)
|
||||
{
|
||||
keys64[i] = column.get64(i);
|
||||
thread_nums[i] = intHash32<0xd1f93e3190506c7cULL>(keys64[i]) % threads;
|
||||
keys64[i] = column.get64(i); /// TODO Убрать виртуальный вызов
|
||||
thread_nums[i] = intHash32<0xd1f93e3190506c7cULL>(keys64[i]) % threads; /// TODO более эффективная хэш-функция
|
||||
}
|
||||
}
|
||||
else if (method == AggregatedDataVariants::KEY_STRING)
|
||||
@ -216,24 +222,8 @@ void SplittingAggregator::calculateHashesThread(Block & block, size_t begin, siz
|
||||
}
|
||||
|
||||
|
||||
void SplittingAggregator::aggregateThread(
|
||||
Block & block, AggregatedDataVariants & result, size_t thread_no, ExceptionPtr & exception, MemoryTracker * memory_tracker)
|
||||
{
|
||||
current_memory_tracker = memory_tracker;
|
||||
|
||||
try
|
||||
{
|
||||
result.aggregator = this;
|
||||
|
||||
/** Используется, если есть ограничение на максимальное количество строк при агрегации,
|
||||
* и если group_by_overflow_mode == ANY.
|
||||
* В этом случае, новые ключи не добавляются в набор, а производится агрегация только по
|
||||
* ключам, которые уже успели попасть в набор.
|
||||
*/
|
||||
bool no_more_keys = max_rows_to_group_by && size_of_all_results > max_rows_to_group_by;
|
||||
size_t old_result_size = result.size();
|
||||
|
||||
if (method == AggregatedDataVariants::KEY_64)
|
||||
template <typename FieldType>
|
||||
void SplittingAggregator::aggregateOneNumber(AggregatedDataVariants & result, size_t thread_no, bool no_more_keys)
|
||||
{
|
||||
AggregatedDataWithUInt64Key & res = result.key64->data;
|
||||
|
||||
@ -269,6 +259,33 @@ void SplittingAggregator::aggregateThread(
|
||||
aggregate_functions[j]->add(it->second + offsets_of_aggregate_states[j], &aggregate_columns[j][0], i);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void SplittingAggregator::aggregateThread(
|
||||
Block & block, AggregatedDataVariants & result, size_t thread_no, ExceptionPtr & exception, MemoryTracker * memory_tracker)
|
||||
{
|
||||
current_memory_tracker = memory_tracker;
|
||||
|
||||
try
|
||||
{
|
||||
result.aggregator = this;
|
||||
|
||||
/** Используется, если есть ограничение на максимальное количество строк при агрегации,
|
||||
* и если group_by_overflow_mode == ANY.
|
||||
* В этом случае, новые ключи не добавляются в набор, а производится агрегация только по
|
||||
* ключам, которые уже успели попасть в набор.
|
||||
*/
|
||||
bool no_more_keys = max_rows_to_group_by && size_of_all_results > max_rows_to_group_by;
|
||||
size_t old_result_size = result.size();
|
||||
|
||||
if (method == AggregatedDataVariants::KEY_8)
|
||||
aggregateOneNumber<UInt8>(result, thread_no, no_more_keys);
|
||||
else if (method == AggregatedDataVariants::KEY_16)
|
||||
aggregateOneNumber<UInt16>(result, thread_no, no_more_keys);
|
||||
else if (method == AggregatedDataVariants::KEY_32)
|
||||
aggregateOneNumber<UInt32>(result, thread_no, no_more_keys);
|
||||
else if (method == AggregatedDataVariants::KEY_64)
|
||||
aggregateOneNumber<UInt64>(result, thread_no, no_more_keys);
|
||||
else if (method == AggregatedDataVariants::KEY_STRING)
|
||||
{
|
||||
AggregatedDataWithStringKey & res = result.key_string->data;
|
||||
|
||||
@ -34,7 +34,7 @@ BlockInputStreams StorageSystemOne::read(
|
||||
ColumnWithNameAndType col;
|
||||
col.name = "dummy";
|
||||
col.type = new DataTypeUInt8;
|
||||
col.column = new ColumnConstUInt8(1, 0);
|
||||
col.column = ColumnConstUInt8(1, 0).convertToFullColumn();
|
||||
block.insert(col);
|
||||
|
||||
return BlockInputStreams(1, new OneBlockInputStream(block));
|
||||
|
||||
@ -1 +1 @@
|
||||
SELECT quantilesTiming(0.1, 0.5, 0.9)(materialize(dummy)) FROM remote('127.0.0.{1,2}', system, one) GROUP BY 1 WITH TOTALS
|
||||
SELECT quantilesTiming(0.1, 0.5, 0.9)(dummy) FROM remote('127.0.0.{1,2}', system, one) GROUP BY 1 WITH TOTALS
|
||||
|
||||
Loading…
Reference in New Issue
Block a user