jacktengg commented on code in PR #66761: URL: https://github.com/apache/doris/pull/66761#discussion_r3826928570
########## be/src/core/data_type_serde/data_type_timestamp_ns_serde.cpp: ########## @@ -0,0 +1,270 @@ +// 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_timestamp_ns_serde.h" + +#include <cctz/time_zone.h> + +#include <algorithm> +#include <cctype> +#include <limits> +#include <string> + +#include "common/exception.h" +#include "core/assert_cast.h" +#include "core/column/column_nullable.h" +#include "core/column/column_string.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 { +Status parse_timestamp_ns(StringRef str, int64_t* epoch_nanos, + const cctz::time_zone* local_time_zone) { + std::string input(str.data, str.size); + const size_t dot = input.rfind('.'); + size_t fraction_begin = std::string::npos; + size_t fraction_end = std::string::npos; + 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, TimeStampNsValue::FRACTIONAL_DIGITS); + 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 < TimeStampNsValue::FRACTIONAL_DIGITS; ++i) { + nanos *= 10; + } + } + + if (fraction_length > TimeStampNsValue::FRACTIONAL_DIGITS && + input[fraction_begin + TimeStampNsValue::FRACTIONAL_DIGITS] >= '5') { + ++nanos; + } + + // Keep the fractional token in place so that the legacy parser validates its position and all + // trailing syntax. Zeroing the digits prevents its scale-0 rounding from changing the second; + // the nanosecond rounding above remains the only source of fractional rounding. + if (fraction_begin != std::string::npos) { + std::fill(input.begin() + fraction_begin, input.begin() + fraction_end, '0'); + } + const StringRef input_ref(input.data(), input.size()); + DateV2Value<DateTimeV2ValueType> datetime; + CastParameters params {.status = Status::OK(), .is_strict = true}; + CastToDatetimeV2::from_string_strict_mode<DatelikeParseMode::STRICT>( + input_ref, datetime, local_time_zone, 0, params); + if (!params.status.ok()) { + if (dot != std::string::npos) { + return Status::InvalidArgument("Invalid TIMESTAMP_NS value '{}'", + std::string(str.data, str.size)); + } + return params.status; + } + + if (nanos == TimeStampNsValue::NANOS_PER_SECOND) { + if (!datetime.date_add_interval<TimeUnit::SECOND>( + TimeInterval {TimeUnit::SECOND, 1, false})) { + return Status::InvalidArgument("TIMESTAMP_NS value overflows while rounding '{}'", + std::string(str.data, str.size)); + } + nanos = 0; + } + datetime.set_microsecond(nanos / TimeStampNsValue::NANOS_PER_MICROSECOND); + TimeStampNsValue value; + if (!value.from_datetime( + datetime, static_cast<uint16_t>(nanos % TimeStampNsValue::NANOS_PER_MICROSECOND))) { + return Status::InvalidArgument( + "TIMESTAMP_NS value '{}' is outside [{}, {}]", std::string(str.data, str.size), + TimeStampNsValue(std::numeric_limits<int64_t>::min()).to_string(), + TimeStampNsValue(std::numeric_limits<int64_t>::max()).to_string()); + } + *epoch_nanos = value.epoch_nanos(); + return Status::OK(); +} + +Status DataTypeTimeStampNsSerDe::from_string_batch(const ColumnString& strings, + ColumnNullable& result, + const FormatOptions& options) const { + auto& data = assert_cast<ColumnTimeStampNs&>(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_timestamp_ns(strings.get_data_at(i), &value, options.timezone); + null_map[i] = !status.ok(); + data[i] = TimeStampNsValue(value); + } + return Status::OK(); +} + +Status DataTypeTimeStampNsSerDe::from_string_strict_mode_batch( + const ColumnString& strings, IColumn& result, const FormatOptions& options, + const NullMap::value_type* null_map) const { + auto& data = assert_cast<ColumnTimeStampNs&>(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_timestamp_ns(strings.get_data_at(i), &value, options.timezone)); + data[i] = TimeStampNsValue(value); + } + return Status::OK(); +} + +Status DataTypeTimeStampNsSerDe::from_string(StringRef& str, IColumn& column, + const FormatOptions& options) const { + int64_t value = 0; + RETURN_IF_ERROR(parse_timestamp_ns(str, &value, options.timezone)); + assert_cast<ColumnTimeStampNs&>(column).insert_value(TimeStampNsValue(value)); + return Status::OK(); +} + +Status DataTypeTimeStampNsSerDe::from_string_strict_mode(StringRef& str, IColumn& column, + const FormatOptions& options) const { + return from_string(str, column, options); +} + +Status DataTypeTimeStampNsSerDe::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 DataTypeTimeStampNsSerDe::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 ColumnTimeStampNs&, TypeCheckOnRelease::DISABLE>(*column_ptr) + .get_element(index); + const std::string result = value.to_string(); + bw.write(result.data(), result.size()); + if (_nesting_level > 1) { + bw.write('"'); + } + return Status::OK(); +} + +Status DataTypeTimeStampNsSerDe::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 DataTypeTimeStampNsSerDe::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 DataTypeTimeStampNsSerDe::deserialize_column_from_jsonb(IColumn& column, + const JsonbValue* jsonb_value, + CastParameters& cast_params) const { + DORIS_CHECK(jsonb_value->isString()); + return parse_column_from_jsonb_string(column, jsonb_value, cast_params); +} + +Status DataTypeTimeStampNsSerDe::deserialize_column_from_jsonb_vector( + ColumnNullable& column_to, const ColumnString& column_from, + CastParameters& cast_params) const { + return DataTypeSerDe::deserialize_column_from_jsonb_vector(column_to, column_from, cast_params); +} + +Status DataTypeTimeStampNsSerDe::write_column_to_arrow(const IColumn& column, + const NullMap* null_map, + arrow::ArrayBuilder* array_builder, + int64_t start, int64_t end, + const cctz::time_zone& ctz) const { + return Status::NotSupported("DataTypeTimeStampNsSerDe::write_column_to_arrow"); Review Comment: external table will be supported later. -- This is an automated message from the Apache Git Service. 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