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https://github.com/ClickHouse/ClickHouse.git
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949 lines
34 KiB
C++
949 lines
34 KiB
C++
#pragma once
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#include <DB/Core/FieldVisitors.h>
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#include <DB/DataTypes/DataTypeArray.h>
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#include <DB/DataTypes/DataTypesNumberFixed.h>
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#include <DB/DataTypes/DataTypeDate.h>
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#include <DB/DataTypes/DataTypeDateTime.h>
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#include <DB/DataTypes/DataTypeString.h>
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#include <DB/Columns/ColumnArray.h>
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#include <DB/Columns/ColumnString.h>
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#include <DB/Columns/ColumnTuple.h>
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#include <DB/Functions/IFunction.h>
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#include <DB/Functions/Conditional/CondException.h>
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#include <DB/Common/HashTable/HashMap.h>
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#include <DB/Common/HashTable/ClearableHashMap.h>
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#include <DB/Common/StringUtils.h>
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#include <DB/Interpreters/AggregationCommon.h>
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#include <DB/Functions/FunctionsConditional.h>
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#include <DB/Functions/FunctionsConversion.h>
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#include <DB/Functions/Conditional/getArrayType.h>
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#include <DB/AggregateFunctions/IAggregateFunction.h>
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#include <DB/AggregateFunctions/AggregateFunctionFactory.h>
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#include <DB/Parsers/ExpressionListParsers.h>
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#include <DB/Parsers/parseQuery.h>
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#include <DB/Parsers/ASTExpressionList.h>
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#include <DB/Parsers/ASTLiteral.h>
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#include <ext/range.hpp>
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#include <unordered_map>
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#include <numeric>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ZERO_ARRAY_OR_TUPLE_INDEX;
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extern const int SIZES_OF_ARRAYS_DOESNT_MATCH;
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extern const int PARAMETERS_TO_AGGREGATE_FUNCTIONS_MUST_BE_LITERALS;
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}
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/** Функции по работе с массивами:
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*
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* array(с1, с2, ...) - создать массив из констант.
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* arrayElement(arr, i) - получить элемент массива по индексу.
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* Индекс начинается с 1. Также индекс может быть отрицательным - тогда он считается с конца массива.
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* has(arr, x) - есть ли в массиве элемент x.
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* indexOf(arr, x) - возвращает индекс элемента x (начиная с 1), если он есть в массиве, или 0, если его нет.
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* arrayEnumerate(arr) - возаращает массив [1,2,3,..., length(arr)]
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*
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* arrayUniq(arr) - считает количество разных элементов в массиве,
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* arrayUniq(arr1, arr2, ...) - считает количество разных кортежей из элементов на соответствующих позициях в нескольких массивах.
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*
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* arrayEnumerateUniq(arr)
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* - возаращает массив, параллельный данному, где для каждого элемента указано,
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* какой он по счету среди элементов с таким значением.
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* Например: arrayEnumerateUniq([10, 20, 10, 30]) = [1, 1, 2, 1]
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* arrayEnumerateUniq(arr1, arr2...)
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* - для кортежей из элементов на соответствующих позициях в нескольких массивах.
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*
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* emptyArrayToSingle(arr) - заменить пустые массивы на массивы из одного элемента со значением "по-умолчанию".
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*
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* arrayReduce('agg', arr1, ...) - применить агрегатную функцию agg к массивам arr1...
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*/
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class FunctionArray : public IFunction
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{
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public:
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static constexpr auto name = "array";
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static FunctionPtr create(const Context & context);
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FunctionArray(const Context & context);
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void setCaseMode();
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/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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/// Выполнить функцию над блоком.
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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private:
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/// Получить имя функции.
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String getName() const override;
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bool addField(DataTypePtr type_res, const Field & f, Array & arr) const;
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static const DataTypePtr & getScalarType(const DataTypePtr & type);
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DataTypeTraits::EnrichedDataTypePtr getLeastCommonType(const DataTypes & arguments) const;
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private:
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const Context & context;
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bool is_case_mode = false;
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};
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class FunctionArrayElement : public IFunction
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{
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public:
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static constexpr auto name = "arrayElement";
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static FunctionPtr create(const Context & context);
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/// Получить имя функции.
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String getName() const override;
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/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
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/// Выполнить функцию над блоком.
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
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private:
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template <typename DataType>
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bool executeNumberConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & index);
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template <typename IndexType, typename DataType>
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bool executeNumber(Block & block, const ColumnNumbers & arguments, size_t result, const PaddedPODArray<IndexType> & indices);
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bool executeStringConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & index);
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template <typename IndexType>
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bool executeString(Block & block, const ColumnNumbers & arguments, size_t result, const PaddedPODArray<IndexType> & indices);
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bool executeGenericConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & index);
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template <typename IndexType>
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bool executeGeneric(Block & block, const ColumnNumbers & arguments, size_t result, const PaddedPODArray<IndexType> & indices);
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bool executeConstConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & index);
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template <typename IndexType>
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bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result, const PaddedPODArray<IndexType> & indices);
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template <typename IndexType>
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bool executeArgument(Block & block, const ColumnNumbers & arguments, size_t result);
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/** Для массива кортежей функция вычисляется покомпонентно - для каждого элемента кортежа.
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*/
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bool executeTuple(Block & block, const ColumnNumbers & arguments, size_t result);
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};
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/// For has.
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struct IndexToOne
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{
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using ResultType = UInt8;
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static bool apply(size_t j, ResultType & current) { current = 1; return false; }
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};
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/// For indexOf.
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struct IndexIdentity
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{
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using ResultType = UInt64;
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/// Индекс возвращается начиная с единицы.
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static bool apply(size_t j, ResultType & current) { current = j + 1; return false; }
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};
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/// For countEqual.
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struct IndexCount
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{
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using ResultType = UInt32;
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static bool apply(size_t j, ResultType & current) { ++current; return true; }
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};
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template <typename T, typename U, typename IndexConv>
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struct ArrayIndexNumImpl
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{
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-compare"
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/// compares `lhs` against `i`-th element of `rhs`
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static bool compare(const T & lhs, const PaddedPODArray<U> & rhs, const std::size_t i ) { return lhs == rhs[i]; }
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/// compares `lhs against `rhs`, third argument unused
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static bool compare(const T & lhs, const U & rhs, std::size_t) { return lhs == rhs; }
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#pragma GCC diagnostic pop
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template <typename ScalarOrVector>
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static void vector(
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const PaddedPODArray<T> & data, const ColumnArray::Offsets_t & offsets,
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const ScalarOrVector & value,
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PaddedPODArray<typename IndexConv::ResultType> & result)
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{
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size_t size = offsets.size();
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result.resize(size);
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ColumnArray::Offset_t current_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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size_t array_size = offsets[i] - current_offset;
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typename IndexConv::ResultType current = 0;
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for (size_t j = 0; j < array_size; ++j)
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if (compare(data[current_offset + j], value, i))
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if (!IndexConv::apply(j, current))
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break;
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result[i] = current;
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current_offset = offsets[i];
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}
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}
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};
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template <typename IndexConv>
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struct ArrayIndexStringImpl
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{
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static void vector_const(
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const ColumnString::Chars_t & data, const ColumnArray::Offsets_t & offsets, const ColumnString::Offsets_t & string_offsets,
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const String & value,
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PaddedPODArray<typename IndexConv::ResultType> & result)
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{
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const auto size = offsets.size();
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const auto value_size = value.size();
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result.resize(size);
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ColumnArray::Offset_t current_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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const auto array_size = offsets[i] - current_offset;
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typename IndexConv::ResultType current = 0;
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for (size_t j = 0; j < array_size; ++j)
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{
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ColumnArray::Offset_t string_pos = current_offset == 0 && j == 0
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? 0
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: string_offsets[current_offset + j - 1];
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ColumnArray::Offset_t string_size = string_offsets[current_offset + j] - string_pos;
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if (string_size == value_size + 1 && 0 == memcmp(value.data(), &data[string_pos], value_size))
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{
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if (!IndexConv::apply(j, current))
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break;
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}
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}
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result[i] = current;
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current_offset = offsets[i];
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}
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}
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static void vector_vector(
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const ColumnString::Chars_t & data, const ColumnArray::Offsets_t & offsets, const ColumnString::Offsets_t & string_offsets,
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const ColumnString::Chars_t & item_values, const ColumnString::Offsets_t & item_offsets,
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PaddedPODArray<typename IndexConv::ResultType> & result)
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{
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const auto size = offsets.size();
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result.resize(size);
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ColumnArray::Offset_t current_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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const auto array_size = offsets[i] - current_offset;
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typename IndexConv::ResultType current = 0;
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const auto value_pos = 0 == i ? 0 : item_offsets[i - 1];
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const auto value_size = item_offsets[i] - value_pos;
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for (size_t j = 0; j < array_size; ++j)
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{
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ColumnArray::Offset_t string_pos = current_offset == 0 && j == 0
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? 0
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: string_offsets[current_offset + j - 1];
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ColumnArray::Offset_t string_size = string_offsets[current_offset + j] - string_pos;
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if (string_size == value_size && 0 == memcmp(&item_values[value_pos], &data[string_pos], value_size))
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{
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if (!IndexConv::apply(j, current))
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break;
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}
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}
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result[i] = current;
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current_offset = offsets[i];
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}
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}
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};
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/** Catch-all implementation for arrays of arbitary type.
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*/
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template <typename IndexConv, bool is_value_has_single_element_to_compare>
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struct ArrayIndexGenericImpl
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{
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/** To compare with constant value, create non-constant column with single element,
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* and pass is_value_has_single_element_to_compare = true.
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*/
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static void vector(
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const IColumn & data, const ColumnArray::Offsets_t & offsets,
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const IColumn & value,
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PaddedPODArray<typename IndexConv::ResultType> & result)
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{
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size_t size = offsets.size();
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result.resize(size);
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ColumnArray::Offset_t current_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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size_t array_size = offsets[i] - current_offset;
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typename IndexConv::ResultType current = 0;
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for (size_t j = 0; j < array_size; ++j)
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if (0 == data.compareAt(current_offset + j, is_value_has_single_element_to_compare ? 0 : i, value, 1))
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if (!IndexConv::apply(j, current))
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break;
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result[i] = current;
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current_offset = offsets[i];
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}
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}
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};
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template <typename IndexConv, typename Name>
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class FunctionArrayIndex : public IFunction
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{
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public:
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static constexpr auto name = Name::name;
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static FunctionPtr create(const Context & context) { return std::make_shared<FunctionArrayIndex>(); }
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private:
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using ResultColumnType = ColumnVector<typename IndexConv::ResultType>;
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template <typename T>
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bool executeNumber(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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return executeNumberNumber<T, UInt8>(block, arguments, result)
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|| executeNumberNumber<T, UInt16>(block, arguments, result)
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|| executeNumberNumber<T, UInt32>(block, arguments, result)
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|| executeNumberNumber<T, UInt64>(block, arguments, result)
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|| executeNumberNumber<T, Int8>(block, arguments, result)
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|| executeNumberNumber<T, Int16>(block, arguments, result)
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|| executeNumberNumber<T, Int32>(block, arguments, result)
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|| executeNumberNumber<T, Int64>(block, arguments, result)
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|| executeNumberNumber<T, Float32>(block, arguments, result)
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|| executeNumberNumber<T, Float64>(block, arguments, result);
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}
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template <typename T, typename U>
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bool executeNumberNumber(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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const ColumnArray * col_array = typeid_cast<const ColumnArray *>(block.getByPosition(arguments[0]).column.get());
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if (!col_array)
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return false;
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const ColumnVector<T> * col_nested = typeid_cast<const ColumnVector<T> *>(&col_array->getData());
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if (!col_nested)
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return false;
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const auto item_arg = block.getByPosition(arguments[1]).column.get();
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if (const auto item_arg_const = typeid_cast<const ColumnConst<U> *>(item_arg))
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{
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const auto col_res = std::make_shared<ResultColumnType>();
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block.getByPosition(result).column = col_res;
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ArrayIndexNumImpl<T, U, IndexConv>::vector(col_nested->getData(), col_array->getOffsets(),
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item_arg_const->getData(), col_res->getData());
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}
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else if (const auto item_arg_vector = typeid_cast<const ColumnVector<U> *>(item_arg))
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{
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const auto col_res = std::make_shared<ResultColumnType>();
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block.getByPosition(result).column = col_res;
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ArrayIndexNumImpl<T, U, IndexConv>::vector(col_nested->getData(), col_array->getOffsets(),
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item_arg_vector->getData(), col_res->getData());
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}
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else
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return false;
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return true;
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}
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bool executeString(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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const ColumnArray * col_array = typeid_cast<const ColumnArray *>(block.getByPosition(arguments[0]).column.get());
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if (!col_array)
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return false;
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const ColumnString * col_nested = typeid_cast<const ColumnString *>(&col_array->getData());
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if (!col_nested)
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return false;
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const auto item_arg = block.getByPosition(arguments[1]).column.get();
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if (const auto item_arg_const = typeid_cast<const ColumnConst<String> *>(item_arg))
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{
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const auto col_res = std::make_shared<ResultColumnType>();
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block.getByPosition(result).column = col_res;
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ArrayIndexStringImpl<IndexConv>::vector_const(col_nested->getChars(), col_array->getOffsets(),
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col_nested->getOffsets(), item_arg_const->getData(), col_res->getData());
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}
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else if (const auto item_arg_vector = typeid_cast<const ColumnString *>(item_arg))
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{
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const auto col_res = std::make_shared<ResultColumnType>();
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block.getByPosition(result).column = col_res;
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ArrayIndexStringImpl<IndexConv>::vector_vector(col_nested->getChars(), col_array->getOffsets(),
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col_nested->getOffsets(), item_arg_vector->getChars(), item_arg_vector->getOffsets(),
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col_res->getData());
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}
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else
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return false;
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return true;
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}
|
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bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result)
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{
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const ColumnConstArray * col_array = typeid_cast<const ColumnConstArray *>(block.getByPosition(arguments[0]).column.get());
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if (!col_array)
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return false;
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const Array & arr = col_array->getData();
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const auto item_arg = block.getByPosition(arguments[1]).column.get();
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if (item_arg->isConst())
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{
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typename IndexConv::ResultType current = 0;
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const auto & value = (*item_arg)[0];
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for (size_t i = 0, size = arr.size(); i < size; ++i)
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{
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if (apply_visitor(FieldVisitorAccurateEquals(), arr[i], value))
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{
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if (!IndexConv::apply(i, current))
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break;
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}
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}
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block.getByPosition(result).column = block.getByPosition(result).type->createConstColumn(
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item_arg->size(),
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static_cast<typename NearestFieldType<typename IndexConv::ResultType>::Type>(current));
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}
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else
|
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{
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const auto size = item_arg->size();
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const auto col_res = std::make_shared<ResultColumnType>(size);
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block.getByPosition(result).column = col_res;
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auto & data = col_res->getData();
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for (size_t row = 0; row < size; ++row)
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{
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const auto & value = (*item_arg)[row];
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data[row] = 0;
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for (size_t i = 0, size = arr.size(); i < size; ++i)
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if (apply_visitor(FieldVisitorAccurateEquals(), arr[i], value))
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if (!IndexConv::apply(i, data[row]))
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break;
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}
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}
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return true;
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}
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|
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bool executeGeneric(Block & block, const ColumnNumbers & arguments, size_t result)
|
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{
|
||
const ColumnArray * col_array = typeid_cast<const ColumnArray *>(block.getByPosition(arguments[0]).column.get());
|
||
|
||
if (!col_array)
|
||
return false;
|
||
|
||
const IColumn & col_nested = col_array->getData();
|
||
const IColumn & item_arg = *block.getByPosition(arguments[1]).column;
|
||
|
||
const auto col_res = std::make_shared<ResultColumnType>();
|
||
block.getByPosition(result).column = col_res;
|
||
|
||
if (item_arg.isConst())
|
||
{
|
||
ArrayIndexGenericImpl<IndexConv, true>::vector(col_nested, col_array->getOffsets(),
|
||
*item_arg.cut(0, 1)->convertToFullColumnIfConst(), col_res->getData());
|
||
}
|
||
else
|
||
{
|
||
/// If item_arg is tuple and have constants.
|
||
if (auto materialized_tuple = item_arg.convertToFullColumnIfConst())
|
||
{
|
||
ArrayIndexGenericImpl<IndexConv, false>::vector(
|
||
col_nested, col_array->getOffsets(), *materialized_tuple, col_res->getData());
|
||
}
|
||
else
|
||
ArrayIndexGenericImpl<IndexConv, false>::vector(
|
||
col_nested, col_array->getOffsets(), item_arg, col_res->getData());
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
public:
|
||
/// Получить имя функции.
|
||
String getName() const override
|
||
{
|
||
return name;
|
||
}
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
||
{
|
||
if (arguments.size() != 2)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 2.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
const DataTypeArray * array_type = typeid_cast<const DataTypeArray *>(arguments[0].get());
|
||
if (!array_type)
|
||
throw Exception("First argument for function " + getName() + " must be array.", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
if (!(array_type->getNestedType()->behavesAsNumber() && arguments[1]->behavesAsNumber())
|
||
&& array_type->getNestedType()->getName() != arguments[1]->getName())
|
||
throw Exception("Type of array elements and second argument for function " + getName() + " must be same."
|
||
" Passed: " + arguments[0]->getName() + " and " + arguments[1]->getName() + ".", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
|
||
return std::make_shared<typename DataTypeFromFieldType<typename IndexConv::ResultType>::Type>();
|
||
}
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override
|
||
{
|
||
if (!(executeNumber<UInt8>(block, arguments, result)
|
||
|| executeNumber<UInt16>(block, arguments, result)
|
||
|| executeNumber<UInt32>(block, arguments, result)
|
||
|| executeNumber<UInt64>(block, arguments, result)
|
||
|| executeNumber<Int8>(block, arguments, result)
|
||
|| executeNumber<Int16>(block, arguments, result)
|
||
|| executeNumber<Int32>(block, arguments, result)
|
||
|| executeNumber<Int64>(block, arguments, result)
|
||
|| executeNumber<Float32>(block, arguments, result)
|
||
|| executeNumber<Float64>(block, arguments, result)
|
||
|| executeConst(block, arguments, result)
|
||
|| executeString(block, arguments, result)
|
||
|| executeGeneric(block, arguments, result)))
|
||
throw Exception{
|
||
"Illegal column " + block.getByPosition(arguments[0]).column->getName()
|
||
+ " of first argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN};
|
||
}
|
||
};
|
||
|
||
|
||
class FunctionArrayEnumerate : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "arrayEnumerate";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
};
|
||
|
||
|
||
/// Считает количество разных элементов в массиве, или количество разных кортежей из элементов на соответствующих позициях в нескольких массивах.
|
||
/// NOTE Реализация частично совпадает с arrayEnumerateUniq.
|
||
class FunctionArrayUniq : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "arrayUniq";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
|
||
private:
|
||
/// Изначально выделить кусок памяти для 512 элементов.
|
||
static constexpr size_t INITIAL_SIZE_DEGREE = 9;
|
||
|
||
template <typename T>
|
||
bool executeNumber(const ColumnArray * array, ColumnUInt32::Container_t & res_values);
|
||
|
||
bool executeString(const ColumnArray * array, ColumnUInt32::Container_t & res_values);
|
||
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result);
|
||
|
||
bool execute128bit(
|
||
const ColumnArray::Offsets_t & offsets,
|
||
const ConstColumnPlainPtrs & columns,
|
||
ColumnUInt32::Container_t & res_values);
|
||
|
||
void executeHashed(
|
||
const ColumnArray::Offsets_t & offsets,
|
||
const ConstColumnPlainPtrs & columns,
|
||
ColumnUInt32::Container_t & res_values);
|
||
};
|
||
|
||
|
||
class FunctionArrayEnumerateUniq : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "arrayEnumerateUniq";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
|
||
private:
|
||
/// Изначально выделить кусок памяти для 512 элементов.
|
||
static constexpr size_t INITIAL_SIZE_DEGREE = 9;
|
||
|
||
template <typename T>
|
||
bool executeNumber(const ColumnArray * array, ColumnUInt32::Container_t & res_values);
|
||
|
||
bool executeString(const ColumnArray * array, ColumnUInt32::Container_t & res_values);
|
||
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result);
|
||
|
||
bool execute128bit(
|
||
const ColumnArray::Offsets_t & offsets,
|
||
const ConstColumnPlainPtrs & columns,
|
||
ColumnUInt32::Container_t & res_values);
|
||
|
||
void executeHashed(
|
||
const ColumnArray::Offsets_t & offsets,
|
||
const ConstColumnPlainPtrs & columns,
|
||
ColumnUInt32::Container_t & res_values);
|
||
};
|
||
|
||
|
||
template <typename Type> struct TypeToColumnType { using ColumnType = ColumnVector<Type>; };
|
||
template <> struct TypeToColumnType<String> { using ColumnType = ColumnString; };
|
||
|
||
template <typename DataType> struct DataTypeToName : TypeName<typename DataType::FieldType> { };
|
||
template <> struct DataTypeToName<DataTypeDate> { static std::string get() { return "Date"; } };
|
||
template <> struct DataTypeToName<DataTypeDateTime> { static std::string get() { return "DateTime"; } };
|
||
|
||
template <typename DataType>
|
||
struct FunctionEmptyArray : public IFunction
|
||
{
|
||
static constexpr auto base_name = "emptyArray";
|
||
static const String name;
|
||
static FunctionPtr create(const Context & context) { return std::make_shared<FunctionEmptyArray>(); }
|
||
|
||
private:
|
||
String getName() const override
|
||
{
|
||
return name;
|
||
}
|
||
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
||
{
|
||
if (arguments.size() != 0)
|
||
throw Exception("Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 0.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
|
||
|
||
return std::make_shared<DataTypeArray>(std::make_shared<DataType>());
|
||
}
|
||
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override
|
||
{
|
||
using UnderlyingColumnType = typename TypeToColumnType<typename DataType::FieldType>::ColumnType;
|
||
|
||
block.getByPosition(result).column = std::make_shared<ColumnArray>(
|
||
std::make_shared<UnderlyingColumnType>(),
|
||
std::make_shared<ColumnArray::ColumnOffsets_t>(block.rowsInFirstColumn(), 0));
|
||
}
|
||
};
|
||
|
||
template <typename DataType>
|
||
const String FunctionEmptyArray<DataType>::name = FunctionEmptyArray::base_name + DataTypeToName<DataType>::get();
|
||
|
||
class FunctionRange : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto max_elements = 100000000;
|
||
static constexpr auto name = "range";
|
||
static FunctionPtr create(const Context &) { return std::make_shared<FunctionRange>(); }
|
||
|
||
private:
|
||
String getName() const override
|
||
{
|
||
return name;
|
||
}
|
||
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
|
||
{
|
||
if (arguments.size() != 1)
|
||
throw Exception{
|
||
"Number of arguments for function " + getName() + " doesn't match: passed "
|
||
+ toString(arguments.size()) + ", should be 1.",
|
||
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH
|
||
};
|
||
|
||
const auto arg = arguments.front().get();
|
||
|
||
if (!typeid_cast<const DataTypeUInt8 *>(arg) &&
|
||
!typeid_cast<const DataTypeUInt16 *>(arg) &&
|
||
!typeid_cast<const DataTypeUInt32 *>(arg) &
|
||
!typeid_cast<const DataTypeUInt64 *>(arg))
|
||
{
|
||
throw Exception{
|
||
"Illegal type " + arg->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT
|
||
};
|
||
}
|
||
|
||
return std::make_shared<DataTypeArray>(arg->clone());
|
||
}
|
||
|
||
template <typename T>
|
||
bool executeInternal(Block & block, const IColumn * const arg, const size_t result)
|
||
{
|
||
if (const auto in = typeid_cast<const ColumnVector<T> *>(arg))
|
||
{
|
||
const auto & in_data = in->getData();
|
||
const auto total_values = std::accumulate(std::begin(in_data), std::end(in_data), std::size_t{},
|
||
[this] (const std::size_t lhs, const std::size_t rhs) {
|
||
const auto sum = lhs + rhs;
|
||
if (sum < lhs)
|
||
throw Exception{
|
||
"A call to function " + getName() + " overflows, investigate the values of arguments you are passing",
|
||
ErrorCodes::ARGUMENT_OUT_OF_BOUND
|
||
};
|
||
|
||
return sum;
|
||
});
|
||
|
||
if (total_values > max_elements)
|
||
throw Exception{
|
||
"A call to function " + getName() + " would produce " + std::to_string(total_values) +
|
||
" array elements, which is greater than the allowed maximum of " + std::to_string(max_elements),
|
||
ErrorCodes::ARGUMENT_OUT_OF_BOUND
|
||
};
|
||
|
||
const auto data_col = std::make_shared<ColumnVector<T>>(total_values);
|
||
const auto out = std::make_shared<ColumnArray>(
|
||
data_col,
|
||
std::make_shared<ColumnArray::ColumnOffsets_t>(in->size()));
|
||
block.getByPosition(result).column = out;
|
||
|
||
auto & out_data = data_col->getData();
|
||
auto & out_offsets = out->getOffsets();
|
||
|
||
IColumn::Offset_t offset{};
|
||
for (const auto i : ext::range(0, in->size()))
|
||
{
|
||
std::copy(ext::make_range_iterator(T{}), ext::make_range_iterator(in_data[i]), &out_data[offset]);
|
||
offset += in_data[i];
|
||
out_offsets[i] = offset;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
else if (const auto in = typeid_cast<const ColumnConst<T> *>(arg))
|
||
{
|
||
const auto & in_data = in->getData();
|
||
if (in->size() > std::numeric_limits<std::size_t>::max() / in_data)
|
||
throw Exception{
|
||
"A call to function " + getName() + " overflows, investigate the values of arguments you are passing",
|
||
ErrorCodes::ARGUMENT_OUT_OF_BOUND
|
||
};
|
||
|
||
const std::size_t total_values = in->size() * in_data;
|
||
if (total_values > max_elements)
|
||
throw Exception{
|
||
"A call to function " + getName() + " would produce " + std::to_string(total_values) +
|
||
" array elements, which is greater than the allowed maximum of " + std::to_string(max_elements),
|
||
ErrorCodes::ARGUMENT_OUT_OF_BOUND
|
||
};
|
||
|
||
const auto data_col = std::make_shared<ColumnVector<T>>(total_values);
|
||
const auto out = std::make_shared<ColumnArray>(
|
||
data_col,
|
||
std::make_shared<ColumnArray::ColumnOffsets_t>(in->size()));
|
||
block.getByPosition(result).column = out;
|
||
|
||
auto & out_data = data_col->getData();
|
||
auto & out_offsets = out->getOffsets();
|
||
|
||
IColumn::Offset_t offset{};
|
||
for (const auto i : ext::range(0, in->size()))
|
||
{
|
||
std::copy(ext::make_range_iterator(T{}), ext::make_range_iterator(in_data), &out_data[offset]);
|
||
offset += in_data;
|
||
out_offsets[i] = offset;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, const size_t result) override
|
||
{
|
||
const auto col = block.getByPosition(arguments[0]).column.get();
|
||
|
||
if (!executeInternal<UInt8>(block, col, result) &&
|
||
!executeInternal<UInt16>(block, col, result) &&
|
||
!executeInternal<UInt32>(block, col, result) &&
|
||
!executeInternal<UInt64>(block, col, result))
|
||
{
|
||
throw Exception{
|
||
"Illegal column " + col->getName() + " of argument of function " + getName(),
|
||
ErrorCodes::ILLEGAL_COLUMN
|
||
};
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
class FunctionEmptyArrayToSingle : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "emptyArrayToSingle";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
|
||
private:
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result);
|
||
|
||
template <typename T>
|
||
bool executeNumber(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_offsets,
|
||
IColumn & res_data_col, ColumnArray::Offsets_t & res_offsets);
|
||
|
||
bool executeFixedString(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_offsets,
|
||
IColumn & res_data_col, ColumnArray::Offsets_t & res_offsets);
|
||
|
||
bool executeString(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_array_offsets,
|
||
IColumn & res_data_col, ColumnArray::Offsets_t & res_array_offsets);
|
||
};
|
||
|
||
|
||
class FunctionArrayReverse : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "reverse";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
|
||
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override;
|
||
|
||
/// Выполнить функцию над блоком.
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
|
||
private:
|
||
bool executeConst(Block & block, const ColumnNumbers & arguments, size_t result);
|
||
|
||
template <typename T>
|
||
bool executeNumber(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_offsets,
|
||
IColumn & res_data_col);
|
||
|
||
bool executeFixedString(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_offsets,
|
||
IColumn & res_data_col);
|
||
|
||
bool executeString(
|
||
const IColumn & src_data, const ColumnArray::Offsets_t & src_array_offsets,
|
||
IColumn & res_data_col);
|
||
};
|
||
|
||
|
||
/** Применяет к массиву агрегатную функцию и возвращает её результат.
|
||
* Также может быть применена к нескольким массивам одинаковых размеров, если агрегатная функция принимает несколько аргументов.
|
||
*/
|
||
class FunctionArrayReduce : public IFunction
|
||
{
|
||
public:
|
||
static constexpr auto name = "arrayReduce";
|
||
static FunctionPtr create(const Context & context);
|
||
|
||
/// Получить имя функции.
|
||
String getName() const override;
|
||
|
||
void getReturnTypeAndPrerequisitesImpl(
|
||
const ColumnsWithTypeAndName & arguments,
|
||
DataTypePtr & out_return_type,
|
||
std::vector<ExpressionAction> & out_prerequisites) override;
|
||
|
||
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) override;
|
||
private:
|
||
AggregateFunctionPtr aggregate_function;
|
||
};
|
||
|
||
|
||
struct NameHas { static constexpr auto name = "has"; };
|
||
struct NameIndexOf { static constexpr auto name = "indexOf"; };
|
||
struct NameCountEqual { static constexpr auto name = "countEqual"; };
|
||
|
||
using FunctionHas = FunctionArrayIndex<IndexToOne, NameHas>;
|
||
using FunctionIndexOf = FunctionArrayIndex<IndexIdentity, NameIndexOf>;
|
||
using FunctionCountEqual = FunctionArrayIndex<IndexCount, NameCountEqual>;
|
||
|
||
using FunctionEmptyArrayUInt8 = FunctionEmptyArray<DataTypeUInt8>;
|
||
using FunctionEmptyArrayUInt16 = FunctionEmptyArray<DataTypeUInt16>;
|
||
using FunctionEmptyArrayUInt32 = FunctionEmptyArray<DataTypeUInt32>;
|
||
using FunctionEmptyArrayUInt64 = FunctionEmptyArray<DataTypeUInt64>;
|
||
using FunctionEmptyArrayInt8 = FunctionEmptyArray<DataTypeInt8>;
|
||
using FunctionEmptyArrayInt16 = FunctionEmptyArray<DataTypeInt16>;
|
||
using FunctionEmptyArrayInt32 = FunctionEmptyArray<DataTypeInt32>;
|
||
using FunctionEmptyArrayInt64 = FunctionEmptyArray<DataTypeInt64>;
|
||
using FunctionEmptyArrayFloat32 = FunctionEmptyArray<DataTypeFloat32>;
|
||
using FunctionEmptyArrayFloat64 = FunctionEmptyArray<DataTypeFloat64>;
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using FunctionEmptyArrayDate = FunctionEmptyArray<DataTypeDate>;
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using FunctionEmptyArrayDateTime = FunctionEmptyArray<DataTypeDateTime>;
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using FunctionEmptyArrayString = FunctionEmptyArray<DataTypeString>;
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||
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||
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||
}
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