[Draft] feat: support fixed length range bitmap file index read and write #147
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| /* | ||
| * Copyright 2024-present Alibaba Inc. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
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| #include "paimon/common/file_index/rangebitmap/bit_slice_index_bitmap.h" | ||
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| #include <fmt/format.h> | ||
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| #include <algorithm> | ||
| #include <cmath> | ||
| #include <string> | ||
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| #include "paimon/common/io/memory_segment_output_stream.h" | ||
| #include "paimon/common/memory/memory_segment_utils.h" | ||
| #include "paimon/io/data_input_stream.h" | ||
| #include "paimon/result.h" | ||
| #include "paimon/status.h" | ||
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| namespace paimon { | ||
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| Result<std::unique_ptr<BitSliceIndexBitmap>> BitSliceIndexBitmap::Create( | ||
| const std::shared_ptr<MemoryPool>& pool, const std::shared_ptr<InputStream>& input_stream, | ||
| const int32_t offset) { | ||
| const auto data_in = std::make_unique<DataInputStream>(input_stream); | ||
| PAIMON_RETURN_NOT_OK(data_in->Seek(offset)); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto header_length, data_in->ReadValue<int32_t>()); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto version, data_in->ReadValue<int8_t>()); | ||
| if (version != CURRENT_VERSION) { | ||
| return Status::Invalid("Unknown BitSliceBitmap Version"); | ||
| } | ||
| PAIMON_ASSIGN_OR_RAISE(const auto slices_size, data_in->ReadValue<int8_t>()); | ||
| auto slices = std::vector<std::unique_ptr<RoaringBitmap32>>(); | ||
| slices.resize(slices_size); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto ebm_size, data_in->ReadValue<int32_t>()); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto indexes_length, data_in->ReadValue<int32_t>()); | ||
| auto indexes = Bytes::AllocateBytes(indexes_length, pool.get()); | ||
| PAIMON_RETURN_NOT_OK(data_in->Read(indexes->data(), indexes_length)); | ||
| auto body_offset = offset + sizeof(int32_t) + header_length; | ||
| return std::make_unique<BitSliceIndexBitmap>(pool, indexes_length, std::move(indexes), ebm_size, | ||
| slices_size, input_stream, body_offset); | ||
| } | ||
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| static int32_t NumberOfLeadingZeros(const int64_t value) { | ||
| if (value == 0) { | ||
| return 64; | ||
| } | ||
| return __builtin_clzll(static_cast<uint64_t>(value)); | ||
| } | ||
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| static int32_t NumberOfTrailingZeros(const int64_t value) { | ||
| if (value == 0) { | ||
| return 64; | ||
| } | ||
| return __builtin_ctzll(static_cast<uint64_t>(value)); | ||
| } | ||
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| BitSliceIndexBitmap::BitSliceIndexBitmap(const std::shared_ptr<MemoryPool>& pool, | ||
| const int32_t indexes_length, | ||
| PAIMON_UNIQUE_PTR<Bytes> indexes, const int32_t ebm_length, | ||
| const int32_t slices_size, | ||
| const std::shared_ptr<InputStream>& input_stream, | ||
| const int32_t body_offset) | ||
| : pool_(pool), | ||
| initialized_(false), | ||
| bit_slices_(std::vector<std::optional<RoaringBitmap32>>(slices_size, {std::nullopt})), | ||
| ebm({std::nullopt}), | ||
| input_stream_(input_stream), | ||
| body_offset_(body_offset), | ||
| indexes_(std::move(indexes)), | ||
| ebm_length_(ebm_length), | ||
| indexes_length_(indexes_length) {} | ||
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| Result<const RoaringBitmap32*> BitSliceIndexBitmap::GetEmptyBitmap() { | ||
| if (!ebm.has_value()) { | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Seek(body_offset_, FS_SEEK_SET)); | ||
| const auto bytes = Bytes::AllocateBytes(ebm_length_, pool_.get()); | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Read(bytes->data(), ebm_length_)); | ||
| RoaringBitmap32 bitmap; | ||
| PAIMON_RETURN_NOT_OK(bitmap.Deserialize(bytes->data(), ebm_length_)); | ||
| ebm = bitmap; | ||
| } | ||
| return &ebm.value(); | ||
| } | ||
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| Result<const RoaringBitmap32*> BitSliceIndexBitmap::GetSliceBitmap(const int32_t idx) { | ||
| if (!bit_slices_[idx].has_value()) { | ||
| const auto data_in = std::make_unique<DataInputStream>( | ||
| std::make_shared<ByteArrayInputStream>(indexes_->data(), indexes_length_)); | ||
| const int position = static_cast<int32_t>(2 * sizeof(int32_t) * idx); | ||
| PAIMON_RETURN_NOT_OK(data_in->Seek(position)); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto offset, data_in->ReadValue<int32_t>()); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto length, data_in->ReadValue<int32_t>()); | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Seek(body_offset_ + ebm_length_ + offset, FS_SEEK_SET)); | ||
| RoaringBitmap32 bitmap; | ||
| const auto bytes = Bytes::AllocateBytes(length, pool_.get()); | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Read(bytes->data(), length)); | ||
| PAIMON_RETURN_NOT_OK(bitmap.Deserialize(bytes->data(), length)); | ||
| bit_slices_[idx] = bitmap; | ||
| } | ||
| return &bit_slices_[idx].value(); | ||
| } | ||
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| /// Batch load slices from start to end to avoid unnecessary IO | ||
| Status BitSliceIndexBitmap::LoadSlices(const int32_t start, const int32_t end) { | ||
| if (initialized_) { | ||
|
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| return Status::OK(); | ||
| } | ||
| auto indexes_stream = std::make_shared<ByteArrayInputStream>(indexes_->data(), indexes_length_); | ||
| const auto data_in = std::make_unique<DataInputStream>(indexes_stream); | ||
| const auto position = static_cast<int32_t>(2 * sizeof(int32_t) * start); | ||
| PAIMON_RETURN_NOT_OK(data_in->Seek(position)); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto offset, data_in->ReadValue<int32_t>()); | ||
| PAIMON_ASSIGN_OR_RAISE(auto length, data_in->ReadValue<int32_t>()); | ||
| std::vector<int32_t> lengths(end); | ||
| lengths[start] = length; | ||
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| for (int32_t i = start + 1; i < end; ++i) { | ||
| PAIMON_RETURN_NOT_OK(data_in->ReadValue<int32_t>()); | ||
| PAIMON_ASSIGN_OR_RAISE(const auto slice_length, data_in->ReadValue<int32_t>()); | ||
| lengths[i] = slice_length; | ||
| length += slice_length; | ||
| } | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Seek(body_offset_ + ebm_length_ + offset, FS_SEEK_SET)); | ||
| const auto bytes = Bytes::AllocateBytes(length, pool_.get()); | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Read(bytes->data(), length)); | ||
| int32_t byte_position = 0; | ||
| for (int32_t i = start; i < end; ++i) { | ||
| const int32_t slice_length = lengths[i]; | ||
| RoaringBitmap32 bitmap; | ||
| PAIMON_RETURN_NOT_OK(bitmap.Deserialize(bytes->data() + byte_position, slice_length)); | ||
| bit_slices_[i] = std::move(bitmap); | ||
| byte_position += slice_length; | ||
| } | ||
| initialized_ = true; | ||
| return Status::OK(); | ||
| } | ||
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| Result<RoaringBitmap32> BitSliceIndexBitmap::Eq(const int32_t code) { | ||
| PAIMON_ASSIGN_OR_RAISE(const auto empty_bitmap, GetEmptyBitmap()); | ||
| auto equal = RoaringBitmap32(*empty_bitmap); | ||
| for (int32_t i = static_cast<int32_t>(bit_slices_.size()) - 1; i >= 0; --i) { | ||
| PAIMON_ASSIGN_OR_RAISE(const auto slice_bitmap, GetSliceBitmap(i)); | ||
| if ((code >> i & 1) == 1) { | ||
| equal &= *slice_bitmap; | ||
| } else { | ||
| equal -= *slice_bitmap; | ||
| } | ||
| } | ||
| return equal; | ||
| } | ||
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| Result<RoaringBitmap32> BitSliceIndexBitmap::Gt(const int32_t code) { | ||
| if (code < 0) { | ||
| return IsNotNull({}); | ||
| } | ||
| PAIMON_ASSIGN_OR_RAISE(const auto found_set, IsNotNull({})); | ||
| if (found_set.IsEmpty()) { | ||
| return RoaringBitmap32(); | ||
| } | ||
| auto state = RoaringBitmap32{}; | ||
| auto state_inited = false; | ||
| const auto start = NumberOfTrailingZeros(~code); | ||
| PAIMON_RETURN_NOT_OK(LoadSlices(start, static_cast<int32_t>(bit_slices_.size()))); | ||
| for (int i = start; i < static_cast<int32_t>(bit_slices_.size()); ++i) { | ||
| if (!state_inited) { | ||
| PAIMON_ASSIGN_OR_RAISE(const auto slice_ptr, GetSliceBitmap(i)); | ||
| state = *slice_ptr; | ||
| state_inited = true; | ||
| continue; | ||
| } | ||
| const auto bit = code >> i & 1; | ||
| PAIMON_ASSIGN_OR_RAISE(const auto slice_ptr, GetSliceBitmap(i)); | ||
| if (bit == 1) { | ||
| state &= *slice_ptr; | ||
| } else { | ||
| state |= *slice_ptr; | ||
| } | ||
| } | ||
| if (!state_inited) { | ||
| return RoaringBitmap32(); | ||
| } | ||
| return state &= found_set; | ||
| } | ||
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| Result<RoaringBitmap32> BitSliceIndexBitmap::Gte(const int32_t code) { | ||
| return Gt(code - 1); | ||
| } | ||
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| Result<RoaringBitmap32> BitSliceIndexBitmap::IsNotNull(const RoaringBitmap32& found_set) { | ||
| if (!ebm.has_value()) { | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Seek(body_offset_, FS_SEEK_SET)); | ||
| const auto bytes = Bytes::AllocateBytes(ebm_length_, pool_.get()); | ||
| PAIMON_RETURN_NOT_OK(input_stream_->Read(bytes->data(), ebm_length_)); | ||
| RoaringBitmap32 bitmap; | ||
| PAIMON_RETURN_NOT_OK(bitmap.Deserialize(bytes->data(), ebm_length_)); | ||
| ebm = bitmap; | ||
| } | ||
|
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| return found_set.IsEmpty() ? ebm.value() : RoaringBitmap32::And(ebm.value(), found_set); | ||
| } | ||
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| BitSliceIndexBitmap::Appender::Appender(const std::shared_ptr<MemoryPool>& pool, const int32_t min, | ||
| const int32_t max) | ||
| : pool_(pool), min_(min), max_(max) { | ||
|
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| ebm_ = RoaringBitmap32{}; | ||
|
Collaborator
There was a problem hiding this comment. Generally, we place memory pool parameters at the end of function parameter lists, and memory pool member variables at the beginning of class member declarations (which helps ensure safe destruction order). |
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| const auto slices_size = std::max(64 - NumberOfLeadingZeros(max), 1); | ||
| slices_.resize(slices_size); | ||
| } | ||
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| Status BitSliceIndexBitmap::Appender::Append(const int32_t key, const int32_t value) { | ||
| if (key < 0) { | ||
| return Status::Invalid(fmt::format("Invalid key: {}", key)); | ||
| } | ||
| if (value < min_ || value > max_) { | ||
| return Status::Invalid(fmt::format("value not in range [{}, {}]", min_, max_)); | ||
| } | ||
| int bits = value; | ||
| while (bits != 0) { | ||
| slices_[NumberOfTrailingZeros(bits)].Add(key); | ||
| bits &= (bits - 1); | ||
| } | ||
| ebm_.Add(key); | ||
| return Status::OK(); | ||
| } | ||
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| Result<PAIMON_UNIQUE_PTR<Bytes>> BitSliceIndexBitmap::Appender::Serialize() const { | ||
| const auto indexes_length = static_cast<int32_t>(2 * sizeof(int32_t) * slices_.size()); | ||
| const auto ebm_bytes = ebm_.Serialize(pool_.get()); | ||
| const auto ebm_length = static_cast<int32_t>(ebm_bytes->size()); | ||
| int32_t header_size = 0; | ||
| header_size += sizeof(int8_t); // version | ||
| header_size += sizeof(int8_t); // slices size | ||
| header_size += sizeof(int32_t); // ebm length | ||
| header_size += sizeof(int32_t); // indexes length | ||
| header_size += indexes_length; | ||
| int32_t offset = 0; | ||
| const auto data_output_stream = std::make_unique<MemorySegmentOutputStream>( | ||
| MemorySegmentOutputStream::DEFAULT_SEGMENT_SIZE, pool_); | ||
| auto slices_bytes_vector = std::vector<PAIMON_UNIQUE_PTR<Bytes>>{}; | ||
| auto indexes_vector = std::vector<std::pair<int32_t, int32_t>>{}; | ||
| for (const auto& slice : slices_) { | ||
| auto slice_bytes = slice.Serialize(pool_.get()); | ||
| const auto length = static_cast<int32_t>(slice_bytes->size()); | ||
| indexes_vector.emplace_back(offset, length); | ||
| offset += length; | ||
| slices_bytes_vector.emplace_back(std::move(slice_bytes)); | ||
| } | ||
| data_output_stream->WriteValue<int32_t>(header_size); | ||
| data_output_stream->WriteValue<int8_t>(CURRENT_VERSION); | ||
| data_output_stream->WriteValue<int8_t>(static_cast<int8_t>(slices_.size())); | ||
| data_output_stream->WriteValue<int32_t>(ebm_length); | ||
| data_output_stream->WriteValue<int32_t>(indexes_length); | ||
| for (const auto& [slice_offset, length] : indexes_vector) { | ||
| data_output_stream->WriteValue<int32_t>(slice_offset); | ||
| data_output_stream->WriteValue<int32_t>(length); | ||
| } | ||
| data_output_stream->Write(ebm_bytes->data(), ebm_length); | ||
| for (const auto& slice_bytes : slices_bytes_vector) { | ||
| data_output_stream->Write(slice_bytes->data(), slice_bytes->size()); | ||
| } | ||
| return MemorySegmentUtils::CopyToBytes(data_output_stream->Segments(), 0, | ||
| static_cast<int32_t>(data_output_stream->CurrentSize()), | ||
| pool_.get()); | ||
| } | ||
| } // namespace paimon | ||
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ebm = std::move(bitmap);
bit_slices_[idx] = std::move(bitmap);