HappenLee commented on code in PR #32089: URL: https://github.com/apache/doris/pull/32089#discussion_r1522438996
########## be/src/vec/functions/hll_from_base64.cpp: ########## @@ -0,0 +1,164 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +#include <stddef.h> +#include <stdint.h> + +#include "olap/hll.h" +#include "util/url_coding.h" +#include "vec/columns/column_array.h" +#include "vec/columns/column_complex.h" +#include "vec/columns/column_nullable.h" +#include "vec/columns/column_string.h" +#include "vec/data_types/data_type.h" +#include "vec/data_types/data_type_array.h" +#include "vec/data_types/data_type_hll.h" +#include "vec/data_types/data_type_string.h" +#include "vec/functions/simple_function_factory.h" + +namespace doris::vectorized { + +struct HllFromBase64 { + using ArgumentType = DataTypeString; + + static constexpr auto name = "hll_from_base64"; + + static Status vector(const ColumnString::Chars& data, const ColumnString::Offsets& offsets, + std::vector<HyperLogLog>& res, NullMap& null_map, + size_t input_rows_count) { + res.reserve(input_rows_count); + if (offsets.size() == 0 && input_rows_count == 1) { + // For NULL constant + res.emplace_back(); + null_map[0] = 1; + return Status::OK(); + } + std::string decode_buff; + int last_decode_buff_len = 0; + int curr_decode_buff_len = 0; + for (size_t i = 0; i < input_rows_count; ++i) { + const char* src_str = reinterpret_cast<const char*>(&data[offsets[i - 1]]); + int64_t src_size = offsets[i] - offsets[i - 1]; + if (0 != src_size % 4) { + res.emplace_back(); + null_map[i] = 1; + continue; + } + curr_decode_buff_len = src_size + 3; + if (curr_decode_buff_len > last_decode_buff_len) { + decode_buff.resize(curr_decode_buff_len); + last_decode_buff_len = curr_decode_buff_len; + } + int outlen = base64_decode(src_str, src_size, decode_buff.data()); + if (outlen < 0) { + res.emplace_back(); + null_map[i] = 1; + } else { + doris::Slice decoded_slice(decode_buff.data(), outlen); + doris::HyperLogLog hll; + if (!hll.deserialize(decoded_slice)) { + return Status::RuntimeError( + fmt::format("hll_from_base64 decode failed: base64: {}", src_str)); + } else { + res.emplace_back(std::move(hll)); + } + } + } + return Status::OK(); + } +}; + +template <typename Impl> +class FunctionHllAlwaysNull : public IFunction { +public: + static constexpr auto name = Impl::name; + + String get_name() const override { return name; } + + static FunctionPtr create() { return std::make_shared<FunctionHllAlwaysNull>(); } + + DataTypePtr get_return_type_impl(const DataTypes& arguments) const override { + return make_nullable(std::make_shared<DataTypeHLL>()); + } + + size_t get_number_of_arguments() const override { return 1; } + + bool use_default_implementation_for_nulls() const override { return true; } + + Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments, + size_t result, size_t input_rows_count) const override { + auto res_null_map = ColumnUInt8::create(input_rows_count, 0); + auto res_data_column = ColumnHLL::create(); + auto& null_map = res_null_map->get_data(); + auto& res = res_data_column->get_data(); + + ColumnPtr& argument_column = block.get_by_position(arguments[0]).column; + if constexpr (std::is_same_v<typename Impl::ArgumentType, DataTypeString>) { + const auto& str_column = static_cast<const ColumnString&>(*argument_column); + const ColumnString::Chars& data = str_column.get_chars(); + const ColumnString::Offsets& offsets = str_column.get_offsets(); + RETURN_IF_ERROR(Impl::vector(data, offsets, res, null_map, input_rows_count)); + } else if constexpr (std::is_same_v<typename Impl::ArgumentType, DataTypeArray>) { + auto argument_type = remove_nullable( + assert_cast<const DataTypeArray&>(*block.get_by_position(arguments[0]).type) + .get_nested_type()); + const auto& array_column = static_cast<const ColumnArray&>(*argument_column); + const auto& offset_column_data = array_column.get_offsets(); + const auto& nested_nullable_column = + static_cast<const ColumnNullable&>(array_column.get_data()); + const auto& nested_column = nested_nullable_column.get_nested_column(); + const auto& nested_null_map = nested_nullable_column.get_null_map_column().get_data(); + + WhichDataType which_type(argument_type); + if (which_type.is_int8()) { + RETURN_IF_ERROR(Impl::template vector<ColumnInt8>(offset_column_data, nested_column, + nested_null_map, res, null_map)); + } else if (which_type.is_uint8()) { + RETURN_IF_ERROR(Impl::template vector<ColumnUInt8>( + offset_column_data, nested_column, nested_null_map, res, null_map)); + } else if (which_type.is_int16()) { + RETURN_IF_ERROR(Impl::template vector<ColumnInt16>( + offset_column_data, nested_column, nested_null_map, res, null_map)); + } else if (which_type.is_int32()) { + RETURN_IF_ERROR(Impl::template vector<ColumnInt32>( + offset_column_data, nested_column, nested_null_map, res, null_map)); + } else if (which_type.is_int64()) { + RETURN_IF_ERROR(Impl::template vector<ColumnInt64>( + offset_column_data, nested_column, nested_null_map, res, null_map)); + } else { + return Status::RuntimeError("Illegal column {} of argument of function {}", + block.get_by_position(arguments[0]).column->get_name(), + get_name()); + } + } else { + return Status::RuntimeError("Illegal column {} of argument of function {}", Review Comment: not need to do check -- This is an automated message from the Apache Git Service. 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