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#include <Columns/ColumnDecimal.h>
#include <Columns/ColumnsNumber.h>
#include <DataTypes/DataTypesDecimal.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionFactory.h>
#include "FunctionArrayMapped.h"
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int ILLEGAL_COLUMN;
}
/** arrayCumSumNonNegative() - returns an array with cumulative sums of the original. (If value < 0 -> 0).
*/
struct ArrayCumSumNonNegativeImpl
{
static bool needBoolean() { return false; }
static bool needExpression() { return false; }
static bool needOneArray() { return false; }
static DataTypePtr getReturnType(const DataTypePtr & expression_return, const DataTypePtr & /*array_element*/)
{
WhichDataType which(expression_return);
if (which.isUInt())
{
if (which.isNativeUInt())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>());
if (which.isUInt128())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt128>());
if (which.isUInt256())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt256>());
UNREACHABLE();
}
if (which.isInt())
{
if (which.isNativeInt())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeInt64>());
if (which.isInt128())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeInt128>());
if (which.isInt256())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeInt256>());
UNREACHABLE();
}
if (which.isFloat())
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeFloat64>());
if (which.isDecimal())
{
UInt32 scale = getDecimalScale(*expression_return);
DataTypePtr nested;
if (which.isDecimal256())
nested = std::make_shared<DataTypeDecimal<Decimal256>>(DecimalUtils::max_precision<Decimal256>, scale);
else
nested = std::make_shared<DataTypeDecimal<Decimal128>>(DecimalUtils::max_precision<Decimal128>, scale);
return std::make_shared<DataTypeArray>(nested);
}
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "arrayCumSumNonNegativeImpl cannot add values of type {}", expression_return->getName());
}
template <typename Src, typename Dst>
static void NO_SANITIZE_UNDEFINED implVector(
size_t size, const IColumn::Offset * __restrict offsets, Dst * __restrict res_values, const Src * __restrict src_values)
{
size_t pos = 0;
for (const auto * end = offsets + size; offsets < end; ++offsets)
{
auto offset = *offsets;
Dst accumulated{};
for (; pos < offset; ++pos)
{
accumulated += src_values[pos];
if (accumulated < Dst{})
accumulated = {};
res_values[pos] = accumulated;
}
}
}
template <typename Element, typename Result>
static bool executeType(const ColumnPtr & mapped, const ColumnArray & array, ColumnPtr & res_ptr)
{
using ColVecType = ColumnVectorOrDecimal<Element>;
using ColVecResult = ColumnVectorOrDecimal<Result>;
const ColVecType * column = checkAndGetColumn<ColVecType>(&*mapped);
if (!column)
return false;
const IColumn::Offsets & offsets = array.getOffsets();
const typename ColVecType::Container & data = column->getData();
typename ColVecResult::MutablePtr res_nested;
if constexpr (is_decimal<Element>)
res_nested = ColVecResult::create(0, column->getScale());
else
res_nested = ColVecResult::create();
typename ColVecResult::Container & res_values = res_nested->getData();
res_values.resize(data.size());
implVector(offsets.size(), offsets.data(), res_values.data(), data.data());
res_ptr = ColumnArray::create(std::move(res_nested), array.getOffsetsPtr());
return true;
}
static ColumnPtr execute(const ColumnArray & array, ColumnPtr mapped)
{
ColumnPtr res;
mapped = mapped->convertToFullColumnIfConst();
if (executeType<UInt8, UInt64>(mapped, array, res) || executeType<UInt16, UInt64>(mapped, array, res)
|| executeType<UInt32, UInt64>(mapped, array, res) || executeType<UInt64, UInt64>(mapped, array, res)
|| executeType<UInt128, UInt128>(mapped, array, res) || executeType<UInt256, UInt256>(mapped, array, res)
|| executeType<Int8, Int64>(mapped, array, res) || executeType<Int16, Int64>(mapped, array, res)
|| executeType<Int32, Int64>(mapped, array, res) || executeType<Int64, Int64>(mapped, array, res)
|| executeType<Int128, Int128>(mapped, array, res) || executeType<Int256, Int256>(mapped, array, res)
|| executeType<Float32, Float64>(mapped, array, res) || executeType<Float64, Float64>(mapped, array, res)
|| executeType<Decimal32, Decimal128>(mapped, array, res) || executeType<Decimal64, Decimal128>(mapped, array, res)
|| executeType<Decimal128, Decimal128>(mapped, array, res) || executeType<Decimal256, Decimal256>(mapped, array, res))
return res;
else
throw Exception(ErrorCodes::ILLEGAL_COLUMN, "Unexpected column for arrayCumSumNonNegativeImpl: {}", mapped->getName());
}
};
struct NameArrayCumSumNonNegative
{
static constexpr auto name = "arrayCumSumNonNegative";
};
using FunctionArrayCumSumNonNegative = FunctionArrayMapped<ArrayCumSumNonNegativeImpl, NameArrayCumSumNonNegative>;
REGISTER_FUNCTION(ArrayCumSumNonNegative)
{
factory.registerFunction<FunctionArrayCumSumNonNegative>();
}
}
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