zhiqiang-hhhh commented on code in PR #35681: URL: https://github.com/apache/doris/pull/35681#discussion_r1629323142
########## be/src/vec/functions/function_from_unixtime.cpp: ########## @@ -0,0 +1,301 @@ +// 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 <cctz/time_zone.h> + +#include <type_traits> + +#include "common/exception.h" +#include "common/status.h" +#include "olap/olap_common.h" +#include "runtime/runtime_state.h" +#include "vec/columns/column_nullable.h" +#include "vec/columns/columns_number.h" +#include "vec/common/assert_cast.h" +#include "vec/common/int_exp.h" +#include "vec/common/string_ref.h" +#include "vec/core/column_numbers.h" +#include "vec/core/types.h" +#include "vec/data_types/data_type.h" +#include "vec/data_types/data_type_decimal.h" +#include "vec/data_types/data_type_number.h" +#include "vec/functions/function.h" +#include "vec/functions/simple_function_factory.h" +#include "vec/runtime/vdatetime_value.h" + +namespace doris::vectorized { + +enum class ArgumentNumber { One, Two }; + +template <typename T, ArgumentNumber argument_num> +struct FromDecimal { + static void apply(const ColumnDecimal<T>* col_dec, Int64 scale, StringRef formatter, + const cctz::time_zone& time_zone, ColumnString::MutablePtr& col_res, + ColumnUInt8::MutablePtr& col_null_map) { + const size_t input_rows_count = col_dec->size(); + for (size_t i = 0; i < input_rows_count; ++i) { + // For from_unixtime(x.10) we will get 10 + Int64 fraction = col_dec->get_fractional_part(i); + if (fraction < 0) { + col_res->insert_default(); + col_null_map->insert_value(1); + continue; + } + + DateV2Value<DateTimeV2ValueType> datetime(0); + + if (scale > 9) { + fraction /= common::exp10_i32(scale - 9); + } else { + fraction *= common::exp10_i32(9 - scale); + } + datetime.from_unixtime(col_dec->get_whole_part(i), fraction, time_zone, + scale > 6 ? 6 : scale); + + char buf[128]; + + if constexpr (argument_num == ArgumentNumber::One) { + if (datetime.to_string(buf, scale) != buf) { + col_res->insert_data(buf, strlen(buf)); + col_null_map->insert_value(0); + } else { + col_res->insert_default(); + col_null_map->insert_value(1); + } + } else { + if (datetime.to_format_string(formatter.data, formatter.size, buf)) { + col_res->insert_data(buf, strlen(buf)); + col_null_map->insert_value(0); + } else { + col_res->insert_default(); + col_null_map->insert_value(1); + } + } + } + } +}; + +struct FromInt64 { + // https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_from-unixtime + // Keep consistent with MySQL + static const int64_t TIMESTAMP_VALID_MAX = 32536771199; + static void apply(const ColumnInt64* col_int64, Int64 scale, StringRef formatter, + const cctz::time_zone& time_zone, ColumnString::MutablePtr& col_res, + ColumnUInt8::MutablePtr& col_null_map) { + const size_t input_rows_count = col_int64->size(); + for (size_t i = 0; i < input_rows_count; ++i) { + const auto& data = col_int64->get_data()[i]; + if (formatter.size > 128 || data < 0 || data > TIMESTAMP_VALID_MAX) { + col_res->insert_default(); + col_null_map->insert_value(1); + continue; + } + + DateV2Value<DateTimeV2ValueType> datetime; + datetime.from_unixtime(static_cast<Int64>(data), 0, time_zone, + static_cast<Int32>(scale)); + + char buf[128]; + if (datetime.to_format_string(formatter.data, formatter.size, buf)) { + col_res->insert_data(buf, strlen(buf)); + col_null_map->insert_value(0); + } else { + col_res->insert_default(); + col_null_map->insert_value(1); + } + } + } +}; + +template <typename from_type, ArgumentNumber argument_num> +class FunctionFromUnixTime : public IFunction { + static_assert(std::is_same_v<from_type, Int64> || std::is_same_v<from_type, Float64> || + IsDecimalNumber<from_type>, + "from_unixtime only support using Int64, Decimal or Float64 as first arugment."); + +public: + static constexpr auto name = "from_unixtime"; + String get_name() const override { return name; } + + static FunctionPtr create() { return std::make_shared<FunctionFromUnixTime>(); } + + size_t get_number_of_arguments() const override { + if constexpr (argument_num == ArgumentNumber::Two) { + return 2; + } else { + return 1; + } + } + + ColumnNumbers get_arguments_that_are_always_constant() const override { + if constexpr (argument_num == ArgumentNumber::Two) { + return {1}; + } else { + return {}; + } + } + + DataTypes get_variadic_argument_types_impl() const override { + if constexpr (IsDecimalNumber<from_type>) { + if constexpr (argument_num == ArgumentNumber::Two) { + return {std::make_shared<vectorized::DataTypeDecimal<Decimal32>>(9, 0), Review Comment: its not matter, pass 0 because of the constructor -- This is an automated message from the Apache Git Service. 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