jacktengg commented on code in PR #66333: URL: https://github.com/apache/doris/pull/66333#discussion_r3713729191
########## be/src/core/data_type_serde/data_type_datetimev2_nano_serde.cpp: ########## @@ -0,0 +1,430 @@ +// 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 "core/data_type_serde/data_type_datetimev2_nano_serde.h" + +#include <arrow/array.h> +#include <arrow/builder.h> +#include <cctz/time_zone.h> + +#include <cctype> +#include <limits> +#include <orc/Vector.hh> +#include <string> + +#include "common/config.h" +#include "core/assert_cast.h" +#include "core/column/column_nullable.h" +#include "core/column/column_string.h" +#include "core/data_type_serde/arrow_validation.h" +#include "core/data_type_serde/decoded_column_view.h" +#include "core/value/vdatetime_value.h" +#include "exprs/function/cast/cast_to_datetimev2_impl.hpp" +#include "util/mysql_row_buffer.h" +#include "util/unaligned.h" + +namespace doris { +namespace { + +constexpr int64_t NANOS_PER_MILLISECOND = 1000000; +constexpr int64_t NANOS_PER_MICROSECOND = 1000; + +bool checked_scale_to_nanos(int64_t value, int64_t multiplier, int64_t* result) { + return !__builtin_mul_overflow(value, multiplier, result); +} + +Status utc_epoch_nanos_to_local_epoch_nanos(int64_t source, const cctz::time_zone& timezone, + int64_t* result) { + const DateTimeV2NanoValue source_value(source); + DateV2Value<DateTimeV2ValueType> local_value; + local_value.from_unixtime(source_value.epoch_seconds(), timezone); + local_value.set_microsecond(source_value.microsecond()); + DateTimeV2NanoValue target_value; + if (!target_value.from_datetime(local_value, source_value.nanosecond_remainder())) { + return Status::DataQualityError("Timestamp {} is outside DATETIMEV2 nanosecond range", + source); + } + *result = target_value.epoch_nanos(); + return Status::OK(); +} + +Status local_epoch_nanos_to_utc_epoch_nanos(int64_t source, const cctz::time_zone& timezone, + int64_t* result) { + const DateTimeV2NanoValue source_value(source); + auto local_value = source_value.to_datetime(); + int64_t seconds = 0; + local_value.unix_timestamp(&seconds, timezone); + const __int128 epoch_nanos = + static_cast<__int128>(seconds) * DateTimeV2NanoValue::NANOS_PER_SECOND + + source_value.nanosecond(); + if (epoch_nanos < std::numeric_limits<int64_t>::min() || + epoch_nanos > std::numeric_limits<int64_t>::max()) { + return Status::DataQualityError("DATETIMEV2 value {} is outside epoch nanosecond range", + source_value.to_string(9)); + } + *result = static_cast<int64_t>(epoch_nanos); + return Status::OK(); +} + +} // namespace + +Status parse_datetimev2_nano(StringRef str, int scale, int64_t* epoch_nanos, + const cctz::time_zone* local_time_zone) { + DORIS_CHECK_GE(scale, 7); + DORIS_CHECK_LE(scale, 9); + + std::string input(str.data, str.size); + size_t fraction_begin = std::string::npos; + size_t fraction_end = std::string::npos; + const size_t dot = input.rfind('.'); + if (dot != std::string::npos && dot + 1 < input.size() && + std::isdigit(static_cast<unsigned char>(input[dot + 1]))) { + fraction_begin = dot + 1; + fraction_end = fraction_begin; + while (fraction_end < input.size() && + std::isdigit(static_cast<unsigned char>(input[fraction_end]))) { + ++fraction_end; + } + } + + uint32_t nanos = 0; + size_t fraction_length = 0; + if (fraction_begin != std::string::npos) { + fraction_length = fraction_end - fraction_begin; + const size_t copied_digits = std::min<size_t>(fraction_length, 9); + for (size_t i = 0; i < copied_digits; ++i) { + nanos = nanos * 10 + static_cast<uint32_t>(input[fraction_begin + i] - '0'); + } + for (size_t i = copied_digits; i < 9; ++i) { + nanos *= 10; + } + } + + const auto quantum = static_cast<uint32_t>(int_exp10(9 - scale)); + nanos = nanos / quantum * quantum; + if (fraction_length > static_cast<size_t>(scale) && input[fraction_begin + scale] >= '5') { + nanos += quantum; + } + + std::string base = input; + if (fraction_begin != std::string::npos) { + base.erase(dot, fraction_end - dot); + } + const StringRef base_ref(base.data(), base.size()); + DateV2Value<DateTimeV2ValueType> datetime; + CastParameters params {.status = Status::OK(), .is_strict = true}; + CastToDatetimeV2::from_string_strict_mode<DatelikeParseMode::STRICT>( + base_ref, datetime, local_time_zone, 0, params); + if (!params.status.ok()) { + return params.status; + } + + if (nanos == DateTimeV2NanoValue::NANOS_PER_SECOND) { + if (!datetime.date_add_interval<TimeUnit::SECOND>( + TimeInterval {TimeUnit::SECOND, 1, false})) { + return Status::InvalidArgument("DATETIMEV2 value overflows while rounding '{}'", input); + } + nanos = 0; + } + datetime.set_microsecond(nanos / NANOS_PER_MICROSECOND); + DateTimeV2NanoValue value; + if (!value.from_datetime(datetime, static_cast<uint16_t>(nanos % NANOS_PER_MICROSECOND))) { + return Status::InvalidArgument( + "DATETIMEV2({}) value '{}' is outside [{}, {}]", scale, input, + DateTimeV2NanoValue(std::numeric_limits<int64_t>::min()).to_string(scale), + DateTimeV2NanoValue(std::numeric_limits<int64_t>::max()).to_string(scale)); + } + *epoch_nanos = value.epoch_nanos(); + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::from_string_batch(const ColumnString& strings, + ColumnNullable& result, + const FormatOptions& options) const { + auto& data = assert_cast<ColumnDateTimeV2Nano&>(result.get_nested_column()).get_data(); + auto& null_map = result.get_null_map_column().get_data(); + result.resize(strings.size()); + for (size_t i = 0; i < strings.size(); ++i) { + int64_t value = 0; + const auto status = + parse_datetimev2_nano(strings.get_data_at(i), _scale, &value, options.timezone); + null_map[i] = !status.ok(); + data[i] = DateTimeV2NanoValue(value); + } + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::from_string_strict_mode_batch( + const ColumnString& strings, IColumn& result, const FormatOptions& options, + const NullMap::value_type* null_map) const { + auto& data = assert_cast<ColumnDateTimeV2Nano&>(result).get_data(); + result.resize(strings.size()); + for (size_t i = 0; i < strings.size(); ++i) { + if (null_map != nullptr && null_map[i]) { + continue; + } + int64_t value = 0; + RETURN_IF_ERROR( + parse_datetimev2_nano(strings.get_data_at(i), _scale, &value, options.timezone)); + data[i] = DateTimeV2NanoValue(value); + } + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::from_string(StringRef& str, IColumn& column, + const FormatOptions& options) const { + int64_t value = 0; + RETURN_IF_ERROR(parse_datetimev2_nano(str, _scale, &value, options.timezone)); + assert_cast<ColumnDateTimeV2Nano&>(column).insert_value(DateTimeV2NanoValue(value)); + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::from_string_strict_mode(StringRef& str, IColumn& column, + const FormatOptions& options) const { + return from_string(str, column, options); +} + +Status DataTypeDateTimeV2NanoSerDe::serialize_column_to_json(const IColumn& column, + int64_t start_idx, int64_t end_idx, + BufferWritable& bw, + FormatOptions& options) const { + SERIALIZE_COLUMN_TO_JSON(); +} + +Status DataTypeDateTimeV2NanoSerDe::serialize_one_cell_to_json(const IColumn& column, + int64_t row_num, BufferWritable& bw, + FormatOptions& options) const { + auto [column_ptr, index] = check_column_const_set_readability(column, row_num); + if (_nesting_level > 1) { + bw.write('"'); + } + const auto value = + assert_cast<const ColumnDateTimeV2Nano&, TypeCheckOnRelease::DISABLE>(*column_ptr) + .get_element(index); + const std::string result = value.to_string(_scale); + bw.write(result.data(), result.size()); + if (_nesting_level > 1) { + bw.write('"'); + } + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::deserialize_column_from_json_vector( + IColumn& column, std::vector<Slice>& slices, uint64_t* num_deserialized, + const FormatOptions& options) const { + DESERIALIZE_COLUMN_FROM_JSON_VECTOR(); + return Status::OK(); +} + +Status DataTypeDateTimeV2NanoSerDe::deserialize_one_cell_from_json( + IColumn& column, Slice& slice, const FormatOptions& options) const { + if (_nesting_level > 1) { + slice.trim_quote(); + } + StringRef str(slice.data, slice.size); + return from_string(str, column, options); +} + +Status DataTypeDateTimeV2NanoSerDe::write_column_to_arrow(const IColumn& column, Review Comment: Will be implementd in following PRs. -- This is an automated message from the Apache Git Service. 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