be/src/storage/segment/encoding_info.cpp

Source
// 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 "storage/segment/encoding_info.h"

#include <gen_cpp/olap_file.pb.h>
#include <gen_cpp/segment_v2.pb.h>

#include <array>
#include <iterator>
#include <type_traits>
#include <unordered_map>
#include <utility>

#include "common/config.h"
#include "common/exception.h"
#include "runtime/exec_env.h"
#include "storage/olap_common.h"
#include "storage/segment/binary_dict_page.h"
#include "storage/segment/binary_dict_page_pre_decoder.h"
#include "storage/segment/binary_plain_page.h"
#include "storage/segment/binary_plain_page_char_strip_pre_decoder.h"
#include "storage/segment/binary_plain_page_v2.h"
#include "storage/segment/binary_plain_page_v2_pre_decoder.h"
#include "storage/segment/binary_plain_page_v3.h"
#include "storage/segment/binary_plain_page_v3_pre_decoder.h"
#include "storage/segment/binary_prefix_page.h"
#include "storage/segment/bitshuffle_page.h"
#include "storage/segment/bitshuffle_page_pre_decoder.h"
#include "storage/segment/frame_of_reference_page.h"
#include "storage/segment/options.h"
#include "storage/segment/plain_page.h"
#include "storage/segment/rle_page.h"
#include "storage/tablet/tablet_schema.h"
#include "storage/types.h"

namespace doris {
namespace segment_v2 {

template <FieldType type, typename CppType>
struct TypeEncodingTraits<type, PLAIN_ENCODING, CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return PlainPageBuilder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new PlainPageDecoder<type>(data, opts);
        return Status::OK();
    }
};

template <FieldType type>
struct TypeEncodingTraits<type, PLAIN_ENCODING, Slice> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BinaryPlainPageBuilder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BinaryPlainPageDecoder<type>(data, opts);
        return Status::OK();
    }
};

template <FieldType type, typename CppType>
struct TypeEncodingTraits<type, PLAIN_ENCODING_V2, CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return PlainPageBuilder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new PlainPageDecoder<type>(data, opts);
        return Status::OK();
    }
};

template <FieldType type>
struct TypeEncodingTraits<type, PLAIN_ENCODING_V2, Slice> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BinaryPlainPageV2Builder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BinaryPlainPageV2Decoder<type>(data, opts);
        return Status::OK();
    }
};

// PLAIN_ENCODING_V3 is a binary plain page, only registered for Slice (binary) types, so it
// has no non-Slice specialization (unlike PLAIN_ENCODING, which also serves numeric types).
template <FieldType type>
struct TypeEncodingTraits<type, PLAIN_ENCODING_V3, Slice> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BinaryPlainPageV3Builder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BinaryPlainPageV3Decoder<type>(data, opts);
        return Status::OK();
    }
};

template <FieldType type, typename CppType>
struct TypeEncodingTraits<type, BIT_SHUFFLE, CppType,
                          typename std::enable_if<!std::is_same<CppType, Slice>::value>::type> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BitshufflePageBuilder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BitShufflePageDecoder<type>(data, opts);
        return Status::OK();
    }
};

template <>
struct TypeEncodingTraits<FieldType::OLAP_FIELD_TYPE_BOOL, RLE, uint8_t> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return RlePageBuilder<FieldType::OLAP_FIELD_TYPE_BOOL>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new RlePageDecoder<FieldType::OLAP_FIELD_TYPE_BOOL>(data, opts);
        return Status::OK();
    }
};

template <FieldType type>
struct TypeEncodingTraits<type, DICT_ENCODING, Slice> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BinaryDictPageBuilder::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BinaryDictPageDecoder(data, opts);
        return Status::OK();
    }
};

template <>
struct TypeEncodingTraits<FieldType::OLAP_FIELD_TYPE_DATE, FOR_ENCODING,
                          typename CppTypeTraits<FieldType::OLAP_FIELD_TYPE_DATE>::CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return FrameOfReferencePageBuilder<FieldType::OLAP_FIELD_TYPE_DATE>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new FrameOfReferencePageDecoder<FieldType::OLAP_FIELD_TYPE_DATE>(data, opts);
        return Status::OK();
    }
};

template <>
struct TypeEncodingTraits<FieldType::OLAP_FIELD_TYPE_DATEV2, FOR_ENCODING,
                          typename CppTypeTraits<FieldType::OLAP_FIELD_TYPE_DATEV2>::CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return FrameOfReferencePageBuilder<FieldType::OLAP_FIELD_TYPE_DATEV2>::create(builder,
                                                                                      opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new FrameOfReferencePageDecoder<FieldType::OLAP_FIELD_TYPE_DATEV2>(data, opts);
        return Status::OK();
    }
};

template <>
struct TypeEncodingTraits<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, FOR_ENCODING,
                          typename CppTypeTraits<FieldType::OLAP_FIELD_TYPE_DATETIMEV2>::CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return FrameOfReferencePageBuilder<FieldType::OLAP_FIELD_TYPE_DATETIMEV2>::create(builder,
                                                                                          opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder =
                new FrameOfReferencePageDecoder<FieldType::OLAP_FIELD_TYPE_DATETIMEV2>(data, opts);
        return Status::OK();
    }
};

template <>
struct TypeEncodingTraits<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, FOR_ENCODING,
                          typename CppTypeTraits<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ>::CppType> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return FrameOfReferencePageBuilder<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ>::create(builder,
                                                                                           opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder =
                new FrameOfReferencePageDecoder<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ>(data, opts);
        return Status::OK();
    }
};

template <FieldType type, typename CppType>
struct TypeEncodingTraits<type, FOR_ENCODING, CppType,
                          typename std::enable_if<IsIntegral<CppType>::value>::type> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return FrameOfReferencePageBuilder<type>::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new FrameOfReferencePageDecoder<type>(data, opts);
        return Status::OK();
    }
};

template <FieldType type>
struct TypeEncodingTraits<type, PREFIX_ENCODING, Slice> {
    static Status create_page_builder(const PageBuilderOptions& opts, PageBuilder** builder) {
        return BinaryPrefixPageBuilder::create(builder, opts);
    }
    static Status create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                      PageDecoder** decoder) {
        *decoder = new BinaryPrefixPageDecoder(data, opts);
        return Status::OK();
    }
};

EncodingInfoResolver::EncodingInfoResolver() {
    // ===== Phase 1: register every supported (type, encoding) combination exactly once =====
    // _register_supported_encoding CHECKs against duplicates; the Phase 2 calls below do not insert into _encoding_map,
    // so every (type, encoding) used as a default must appear here first.

    // signed integers
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TINYINT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TINYINT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TINYINT, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_SMALLINT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_SMALLINT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_SMALLINT, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_INT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_INT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_INT, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BIGINT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BIGINT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BIGINT, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_LARGEINT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_LARGEINT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_LARGEINT, FOR_ENCODING>();

    // unsigned integers
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_UNSIGNED_BIGINT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_UNSIGNED_INT, BIT_SHUFFLE>();

    // FLOAT / DOUBLE
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_FLOAT, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_FLOAT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DOUBLE, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DOUBLE, PLAIN_ENCODING>();

    // binary types (CHAR/VARCHAR/STRING/JSONB/VARIANT)
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_CHAR, DICT_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_CHAR, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_CHAR, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_CHAR, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_CHAR, PREFIX_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, DICT_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, PREFIX_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_STRING, DICT_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_STRING, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_STRING, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_STRING, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_STRING, PREFIX_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_JSONB, DICT_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_JSONB, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_JSONB, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_JSONB, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_JSONB, PREFIX_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARIANT, DICT_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARIANT, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARIANT, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARIANT, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_VARIANT, PREFIX_ENCODING>();

    // BOOL
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BOOL, RLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BOOL, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BOOL, PLAIN_ENCODING>();

    // date / datetime
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATE, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATE, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATE, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATEV2, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATEV2, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATEV2, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIME, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIME, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DATETIME, FOR_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, FOR_ENCODING>();

    // decimal
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL32, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL32, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL64, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL64, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL128I, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL128I, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL256, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_DECIMAL256, PLAIN_ENCODING>();

    // ip
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_IPV4, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_IPV4, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_IPV6, BIT_SHUFFLE>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_IPV6, PLAIN_ENCODING>();

    // aggregate / binary-flavored types
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_HLL, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_HLL, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_HLL, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BITMAP, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BITMAP, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_BITMAP, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_QUANTILE_STATE, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_QUANTILE_STATE, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_QUANTILE_STATE, PLAIN_ENCODING_V3>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_AGG_STATE, PLAIN_ENCODING>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_AGG_STATE, PLAIN_ENCODING_V2>();
    _register_supported_encoding<FieldType::OLAP_FIELD_TYPE_AGG_STATE, PLAIN_ENCODING_V3>();

    // ===== Phase 2a: V2 defaults (write path, V1/V2 segments) =====
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_TINYINT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_SMALLINT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_INT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_BIGINT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_LARGEINT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_UNSIGNED_BIGINT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_UNSIGNED_INT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_FLOAT, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DOUBLE, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_CHAR, DICT_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_VARCHAR, DICT_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_STRING, DICT_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_JSONB, DICT_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_VARIANT, DICT_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_BOOL, RLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DATE, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DATEV2, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DATETIME, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DECIMAL, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DECIMAL32, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DECIMAL64, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DECIMAL128I, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_DECIMAL256, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_IPV4, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_IPV6, BIT_SHUFFLE>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_HLL, PLAIN_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_BITMAP, PLAIN_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_QUANTILE_STATE, PLAIN_ENCODING>();
    _set_v2_default<FieldType::OLAP_FIELD_TYPE_AGG_STATE, PLAIN_ENCODING>();

    // ===== Phase 2b: V3 defaults (write path, V3 segments) =====
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_TINYINT, PLAIN_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_SMALLINT, PLAIN_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_INT, PLAIN_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_BIGINT, PLAIN_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_LARGEINT, PLAIN_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_UNSIGNED_BIGINT, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_UNSIGNED_INT, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_FLOAT, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DOUBLE, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_CHAR, DICT_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_VARCHAR, DICT_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_STRING, DICT_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_JSONB, DICT_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_VARIANT, DICT_ENCODING>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_BOOL, RLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DATE, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DATEV2, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DATETIMEV2, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DATETIME, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_TIMESTAMPTZ, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DECIMAL, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DECIMAL32, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DECIMAL64, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DECIMAL128I, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_DECIMAL256, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_IPV4, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_IPV6, BIT_SHUFFLE>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_HLL, PLAIN_ENCODING_V3>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_BITMAP, PLAIN_ENCODING_V3>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_QUANTILE_STATE, PLAIN_ENCODING_V3>();
    _set_v3_default<FieldType::OLAP_FIELD_TYPE_AGG_STATE, PLAIN_ENCODING_V3>();

    // ===== Phase 2c: IndexedColumn (value-seek) defaults =====
    // Only the PrimaryKeyIndexBuilder consults this map, and it hardcodes VARCHAR.
    // Other types were registered historically (since #2308, 2019) for a generic
    // "any IndexedColumn value-seek caller" use case that never materialized; they
    // were removed to keep this map honest about what production actually needs.
    _set_index_column_encoding<FieldType::OLAP_FIELD_TYPE_VARCHAR, PREFIX_ENCODING>();
}

EncodingInfoResolver::~EncodingInfoResolver() {
    for (auto& it : _encoding_map) {
        delete it.second;
    }
    _encoding_map.clear();
}

EncodingTypePB EncodingInfoResolver::get_v2_default_encoding(FieldType type) const {
    return _lookup(_v2_default_map, type);
}

EncodingTypePB EncodingInfoResolver::get_v3_default_encoding(FieldType type) const {
    return _lookup(_v3_default_map, type);
}

EncodingTypePB EncodingInfoResolver::get_index_column_encoding(FieldType type) const {
    return _lookup(_index_column_encoding_map, type);
}

Status EncodingInfoResolver::get(FieldType data_type, EncodingTypePB encoding_type,
                                 const EncodingInfo** out) {
    auto key = std::make_pair(data_type, encoding_type);
    auto it = _encoding_map.find(key);
    if (it == std::end(_encoding_map)) {
        return Status::InternalError("fail to find valid type encoding, type:{}, encoding:{}",
                                     data_type, encoding_type);
    }
    *out = it->second;
    return Status::OK();
}

template <typename TraitsClass>
EncodingInfo::EncodingInfo(TraitsClass traits)
        : _create_builder_func(TraitsClass::create_page_builder),
          _create_decoder_func(TraitsClass::create_page_decoder),
          _type(TraitsClass::type),
          _encoding(TraitsClass::encoding) {
    if (_encoding == BIT_SHUFFLE) {
        _data_page_pre_decoder = std::make_unique<BitShufflePagePreDecoder>();
    } else if (_encoding == DICT_ENCODING) {
        if constexpr (TraitsClass::type == FieldType::OLAP_FIELD_TYPE_CHAR) {
            _data_page_pre_decoder = std::make_unique<BinaryDictPagePreDecoder<true>>();
        } else {
            _data_page_pre_decoder = std::make_unique<BinaryDictPagePreDecoder<false>>();
        }
    } else if (_encoding == PLAIN_ENCODING) {
        // CHAR plain pages may contain trailing '\0' padding written by older
        // BEs; strip it once at page load so the cached page is unpadded.
        if constexpr (TraitsClass::type == FieldType::OLAP_FIELD_TYPE_CHAR) {
            _data_page_pre_decoder = std::make_unique<BinaryPlainPageCharStripPreDecoder>();
        }
    } else if (_encoding == PLAIN_ENCODING_V2) {
        // Only binary types (Slice) need the predecoder for PLAIN_ENCODING_V2 — it converts
        // varint-encoded lengths to an offset-array format that downstream Slice decoders expect.
        // CHAR pages additionally strip trailing '\0' padding written by the convertor; other
        // Slice types use the non-CHAR specialization. All current (type, PLAIN_ENCODING_V2)
        // registrations are Slice (CHAR/VARCHAR/STRING/JSONB/VARIANT/HLL/BITMAP/QUANTILE_STATE/
        // AGG_STATE per storage/types.h). The else throws at construction time to fail loudly
        // if a future non-Slice registration is added.
        if constexpr (TraitsClass::type == FieldType::OLAP_FIELD_TYPE_CHAR) {
            _data_page_pre_decoder = std::make_unique<BinaryPlainPageV2PreDecoder<true>>();
        } else if constexpr (std::is_same_v<typename TraitsClass::CppType, Slice>) {
            _data_page_pre_decoder = std::make_unique<BinaryPlainPageV2PreDecoder<false>>();
        } else {
            throw Exception(Status::FatalError(
                    "PLAIN_ENCODING_V2 is only supported for Slice (binary) types, but got "
                    "non-Slice type {}",
                    int(TraitsClass::type)));
        }
    } else if (_encoding == PLAIN_ENCODING_V3) {
        // V3 binary plain pages store contiguous data followed by a contiguous varuint length
        // block; the predecoder rewrites that into the V1 offset-array layout downstream Slice
        // decoders expect. CHAR uses the IS_CHAR=true variant so the trailing '\0' padding of
        // CHAR dictionary words (written with the VARCHAR builder) is stripped on read — mirroring
        // PLAIN_ENCODING_V2. strnlen on a write-stripped CHAR page is a no-op, so the variant is
        // also correct for direct CHAR plain V3 pages.
        if constexpr (TraitsClass::type == FieldType::OLAP_FIELD_TYPE_CHAR) {
            _data_page_pre_decoder = std::make_unique<BinaryPlainPageV3PreDecoder<true>>();
        } else if constexpr (std::is_same_v<typename TraitsClass::CppType, Slice>) {
            _data_page_pre_decoder = std::make_unique<BinaryPlainPageV3PreDecoder<false>>();
        } else {
            throw Exception(Status::FatalError(
                    "PLAIN_ENCODING_V3 is only supported for Slice (binary) types, but got "
                    "non-Slice type {}",
                    int(TraitsClass::type)));
        }
    }
}

#ifdef BE_TEST
static EncodingInfoResolver s_encoding_info_resolver;
#endif

Status EncodingInfo::get(FieldType type, EncodingTypePB encoding_type, const EncodingInfo** out) {
#ifdef BE_TEST
    return s_encoding_info_resolver.get(type, encoding_type, out);
#else
    auto* resolver = ExecEnv::GetInstance()->get_encoding_info_resolver();
    if (resolver == nullptr) {
        return Status::InternalError("EncodingInfoResolver not initialized");
    }
    return resolver->get(type, encoding_type, out);
#endif
}

EncodingTypePB EncodingInfo::get_v2_default_encoding(FieldType type) {
#ifdef BE_TEST
    return s_encoding_info_resolver.get_v2_default_encoding(type);
#else
    auto* resolver = ExecEnv::GetInstance()->get_encoding_info_resolver();
    if (resolver == nullptr) {
        return UNKNOWN_ENCODING;
    }
    return resolver->get_v2_default_encoding(type);
#endif
}

EncodingTypePB EncodingInfo::get_v3_default_encoding(FieldType type) {
#ifdef BE_TEST
    return s_encoding_info_resolver.get_v3_default_encoding(type);
#else
    auto* resolver = ExecEnv::GetInstance()->get_encoding_info_resolver();
    if (resolver == nullptr) {
        return UNKNOWN_ENCODING;
    }
    return resolver->get_v3_default_encoding(type);
#endif
}

EncodingTypePB EncodingInfo::get_index_column_encoding(FieldType type) {
#ifdef BE_TEST
    return s_encoding_info_resolver.get_index_column_encoding(type);
#else
    auto* resolver = ExecEnv::GetInstance()->get_encoding_info_resolver();
    if (resolver == nullptr) {
        return UNKNOWN_ENCODING;
    }
    return resolver->get_index_column_encoding(type);
#endif
}

EncodingTypePB EncodingInfo::resolve_default_encoding(TabletStorageFormatPB storage_format,
                                                      const TabletColumn& column) {
    const bool is_v3 = (storage_format == TabletStorageFormatPB::TABLET_STORAGE_FORMAT_V3);

    // Row store data is already serialized as a single blob. Keep it on plain pages to
    // avoid introducing dictionary pages for the hidden row store column; V3 segments use
    // the V3 binary plain layout.
    if (column.is_row_store_column()) {
        return is_v3 ? PLAIN_ENCODING_V3 : PLAIN_ENCODING;
    }
    return is_v3 ? get_v3_default_encoding(column.type()) : get_v2_default_encoding(column.type());
}

Status EncodingInfo::create_page_builder(const PageBuilderOptions& opts,
                                         std::unique_ptr<PageBuilder>& builder) const {
    PageBuilder* raw_builder = nullptr;
    RETURN_IF_ERROR(_create_builder_func(opts, &raw_builder));
    builder.reset(raw_builder);
    return Status::OK();
}

Status EncodingInfo::create_page_decoder(const Slice& data, const PageDecoderOptions& opts,
                                         std::unique_ptr<PageDecoder>& decoder) const {
    PageDecoder* raw_decoder = nullptr;
    RETURN_IF_ERROR(_create_decoder_func(data, opts, &raw_decoder));
    decoder.reset(raw_decoder);
    return Status::OK();
}

} // namespace segment_v2
} // namespace doris

Coverage Report

Created: 2026-06-09 13:42