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0753fd1c77
Less duplication, less confusion ...
144 lines
4.6 KiB
C++
144 lines
4.6 KiB
C++
#include "config.h"
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#if USE_H3
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#include <Columns/ColumnArray.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataTypes/DataTypeArray.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/IFunction.h>
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#include <Common/typeid_cast.h>
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#include <IO/WriteHelpers.h>
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#include <base/range.h>
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#include <constants.h>
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#include <h3api.h>
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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 ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int ILLEGAL_COLUMN;
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extern const int INCORRECT_DATA;
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}
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namespace
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{
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class FunctionH3Line : public IFunction
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{
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public:
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static constexpr auto name = "h3Line";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3Line>(); }
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std::string getName() const override { return name; }
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size_t getNumberOfArguments() const override { return 2; }
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bool useDefaultImplementationForConstants() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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const auto * arg = arguments[0].get();
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if (!WhichDataType(arg).isUInt64())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument {} of function {}. Must be UInt64",
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arg->getName(), 1, getName());
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arg = arguments[1].get();
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if (!WhichDataType(arg).isUInt64())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument {} of function {}. Must be UInt64",
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arg->getName(), 2, getName());
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return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>());
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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auto non_const_arguments = arguments;
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for (auto & argument : non_const_arguments)
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argument.column = argument.column->convertToFullColumnIfConst();
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const auto * col_start_index = checkAndGetColumn<ColumnUInt64>(non_const_arguments[0].column.get());
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if (!col_start_index)
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN,
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"Illegal type {} of argument {} of function {}. Must be UInt64.",
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arguments[0].type->getName(),
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1,
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getName());
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const auto & data_start_index = col_start_index->getData();
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const auto * col_end_index = checkAndGetColumn<ColumnUInt64>(non_const_arguments[1].column.get());
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if (!col_end_index)
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN,
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"Illegal type {} of argument {} of function {}. Must be UInt64.",
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arguments[1].type->getName(),
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2,
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getName());
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const auto & data_end_index = col_end_index->getData();
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auto dst = ColumnArray::create(ColumnUInt64::create());
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auto & dst_data = typeid_cast<ColumnUInt64 &>(dst->getData());
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auto & dst_offsets = dst->getOffsets();
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dst_offsets.resize(input_rows_count);
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/// First calculate array sizes for all rows and save them in Offsets
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UInt64 current_offset = 0;
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for (size_t row = 0; row < input_rows_count; ++row)
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{
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const UInt64 start = data_start_index[row];
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const UInt64 end = data_end_index[row];
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auto size = gridPathCellsSize(start, end);
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if (size < 0)
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throw Exception(
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ErrorCodes::INCORRECT_DATA,
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"Line cannot be computed between start H3 index {} and end H3 index {}",
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start, end);
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current_offset += size;
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dst_offsets[row] = current_offset;
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}
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/// Allocate based on total size of arrays for all rows
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dst_data.getData().resize(current_offset);
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/// Fill the array for each row with known size
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auto* ptr = dst_data.getData().data();
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current_offset = 0;
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for (size_t row = 0; row < input_rows_count; ++row)
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{
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const UInt64 start = data_start_index[row];
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const UInt64 end = data_end_index[row];
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const auto size = dst_offsets[row] - current_offset;
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gridPathCells(start, end, ptr + current_offset);
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current_offset += size;
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}
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return dst;
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}
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};
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}
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REGISTER_FUNCTION(H3Line)
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{
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factory.registerFunction<FunctionH3Line>();
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}
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}
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#endif
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