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#include "clickhouse_config.h"
#if USE_H3
#include <Columns/ColumnArray.h>
#include <Columns/ColumnsNumber.h>
#include <Columns/ColumnConst.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypesNumber.h>
#include <DataTypes/DataTypeTuple.h>
#include <Functions/FunctionFactory.h>
#include <Functions/IFunction.h>
#include <IO/WriteHelpers.h>
#include <Common/typeid_cast.h>
#include <base/range.h>
#include <h3api.h>
namespace DB
{
namespace
{
class FunctionH3GetRes0Indexes final : public IFunction
{
public:
static constexpr auto name = "h3GetRes0Indexes";
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionH3GetRes0Indexes>(); }
std::string getName() const override { return name; }
size_t getNumberOfArguments() const override { return 0; }
bool useDefaultImplementationForConstants() const override { return true; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
{
return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>());
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr & result_type, size_t input_rows_count) const override
{
if (input_rows_count == 0)
return result_type->createColumn();
std::vector<H3Index> res0_indexes;
const auto cell_count = res0CellCount();
res0_indexes.resize(cell_count);
getRes0Cells(res0_indexes.data());
Array res_indexes;
res_indexes.insert(res_indexes.end(), res0_indexes.begin(), res0_indexes.end());
return result_type->createColumnConst(input_rows_count, res_indexes);
}
};
}
REGISTER_FUNCTION(H3GetRes0Indexes)
{
factory.registerFunction<FunctionH3GetRes0Indexes>();
}
}
#endif
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