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base_tablet.cpp
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// 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 "olap/base_tablet.h"
#include <fmt/format.h>
#include <rapidjson/prettywriter.h>
#include <cstdint>
#include <iterator>
#include <random>
#include "common/cast_set.h"
#include "common/logging.h"
#include "common/status.h"
#include "olap/calc_delete_bitmap_executor.h"
#include "olap/delete_bitmap_calculator.h"
#include "olap/iterators.h"
#include "olap/memtable.h"
#include "olap/partial_update_info.h"
#include "olap/primary_key_index.h"
#include "olap/rowid_conversion.h"
#include "olap/rowset/beta_rowset.h"
#include "olap/rowset/rowset.h"
#include "olap/rowset/rowset_fwd.h"
#include "olap/rowset/rowset_reader.h"
#include "olap/tablet_fwd.h"
#include "olap/txn_manager.h"
#include "service/point_query_executor.h"
#include "util/bvar_helper.h"
#include "util/crc32c.h"
#include "util/debug_points.h"
#include "util/doris_metrics.h"
#include "vec/common/assert_cast.h"
#include "vec/common/schema_util.h"
#include "vec/data_types/data_type_factory.hpp"
#include "vec/jsonb/serialize.h"
namespace doris {
#include "common/compile_check_begin.h"
using namespace ErrorCode;
namespace {
bvar::LatencyRecorder g_tablet_commit_phase_update_delete_bitmap_latency(
"doris_pk", "commit_phase_update_delete_bitmap");
bvar::LatencyRecorder g_tablet_lookup_rowkey_latency("doris_pk", "tablet_lookup_rowkey");
bvar::Adder<uint64_t> g_tablet_pk_not_found("doris_pk", "lookup_not_found");
bvar::PerSecond<bvar::Adder<uint64_t>> g_tablet_pk_not_found_per_second(
"doris_pk", "lookup_not_found_per_second", &g_tablet_pk_not_found, 60);
bvar::LatencyRecorder g_tablet_update_delete_bitmap_latency("doris_pk", "update_delete_bitmap");
static bvar::Adder<size_t> g_total_tablet_num("doris_total_tablet_num");
Status _get_segment_column_iterator(const BetaRowsetSharedPtr& rowset, uint32_t segid,
const TabletColumn& target_column,
SegmentCacheHandle* segment_cache_handle,
std::unique_ptr<segment_v2::ColumnIterator>* column_iterator,
OlapReaderStatistics* stats) {
RETURN_IF_ERROR(SegmentLoader::instance()->load_segments(rowset, segment_cache_handle, true));
// find segment
auto it = std::find_if(
segment_cache_handle->get_segments().begin(),
segment_cache_handle->get_segments().end(),
[&segid](const segment_v2::SegmentSharedPtr& seg) { return seg->id() == segid; });
if (it == segment_cache_handle->get_segments().end()) {
return Status::NotFound(fmt::format("rowset {} 's segemnt not found, seg_id {}",
rowset->rowset_id().to_string(), segid));
}
segment_v2::SegmentSharedPtr segment = *it;
StorageReadOptions opts;
opts.stats = stats;
RETURN_IF_ERROR(segment->new_column_iterator(target_column, column_iterator, &opts));
segment_v2::ColumnIteratorOptions opt {
.use_page_cache = !config::disable_storage_page_cache,
.file_reader = segment->file_reader().get(),
.stats = stats,
.io_ctx = io::IOContext {.reader_type = ReaderType::READER_QUERY,
.file_cache_stats = &stats->file_cache_stats},
};
RETURN_IF_ERROR((*column_iterator)->init(opt));
return Status::OK();
}
} // namespace
extern MetricPrototype METRIC_query_scan_bytes;
extern MetricPrototype METRIC_query_scan_rows;
extern MetricPrototype METRIC_query_scan_count;
DEFINE_COUNTER_METRIC_PROTOTYPE_2ARG(flush_bytes, MetricUnit::BYTES);
DEFINE_COUNTER_METRIC_PROTOTYPE_2ARG(flush_finish_count, MetricUnit::OPERATIONS);
BaseTablet::BaseTablet(TabletMetaSharedPtr tablet_meta) : _tablet_meta(std::move(tablet_meta)) {
_metric_entity = DorisMetrics::instance()->metric_registry()->register_entity(
fmt::format("Tablet.{}", tablet_id()), {{"tablet_id", std::to_string(tablet_id())}},
MetricEntityType::kTablet);
INT_COUNTER_METRIC_REGISTER(_metric_entity, query_scan_bytes);
INT_COUNTER_METRIC_REGISTER(_metric_entity, query_scan_rows);
INT_COUNTER_METRIC_REGISTER(_metric_entity, query_scan_count);
INT_COUNTER_METRIC_REGISTER(_metric_entity, flush_bytes);
INT_COUNTER_METRIC_REGISTER(_metric_entity, flush_finish_count);
// construct _timestamped_versioned_tracker from rs and stale rs meta
_timestamped_version_tracker.construct_versioned_tracker(_tablet_meta->all_rs_metas(),
_tablet_meta->all_stale_rs_metas());
// if !_tablet_meta->all_rs_metas()[0]->tablet_schema(),
// that mean the tablet_meta is still no upgrade to doris 1.2 versions.
// Before doris 1.2 version, rowset metas don't have tablet schema.
// And when upgrade to doris 1.2 version,
// all rowset metas will be set the tablet schmea from tablet meta.
if (_tablet_meta->all_rs_metas().empty() || !_tablet_meta->all_rs_metas()[0]->tablet_schema()) {
_max_version_schema = _tablet_meta->tablet_schema();
} else {
_max_version_schema =
tablet_schema_with_merged_max_schema_version(_tablet_meta->all_rs_metas());
}
DCHECK(_max_version_schema);
g_total_tablet_num << 1;
}
BaseTablet::~BaseTablet() {
DorisMetrics::instance()->metric_registry()->deregister_entity(_metric_entity);
g_total_tablet_num << -1;
}
TabletSchemaSPtr BaseTablet::tablet_schema_with_merged_max_schema_version(
const std::vector<RowsetMetaSharedPtr>& rowset_metas) {
RowsetMetaSharedPtr max_schema_version_rs = *std::max_element(
rowset_metas.begin(), rowset_metas.end(),
[](const RowsetMetaSharedPtr& a, const RowsetMetaSharedPtr& b) {
return !a->tablet_schema()
? true
: (!b->tablet_schema()
? false
: a->tablet_schema()->schema_version() <
b->tablet_schema()->schema_version());
});
TabletSchemaSPtr target_schema = max_schema_version_rs->tablet_schema();
if (target_schema->num_variant_columns() > 0) {
// For variant columns tablet schema need to be the merged wide tablet schema
std::vector<TabletSchemaSPtr> schemas;
std::transform(rowset_metas.begin(), rowset_metas.end(), std::back_inserter(schemas),
[](const RowsetMetaSharedPtr& rs_meta) { return rs_meta->tablet_schema(); });
static_cast<void>(
vectorized::schema_util::get_least_common_schema(schemas, nullptr, target_schema));
VLOG_DEBUG << "dump schema: " << target_schema->dump_full_schema();
}
return target_schema;
}
Status BaseTablet::set_tablet_state(TabletState state) {
if (_tablet_meta->tablet_state() == TABLET_SHUTDOWN && state != TABLET_SHUTDOWN) {
return Status::Error<META_INVALID_ARGUMENT>(
"could not change tablet state from shutdown to {}", state);
}
_tablet_meta->set_tablet_state(state);
return Status::OK();
}
void BaseTablet::update_max_version_schema(const TabletSchemaSPtr& tablet_schema) {
std::lock_guard wrlock(_meta_lock);
// Double Check for concurrent update
if (!_max_version_schema ||
tablet_schema->schema_version() > _max_version_schema->schema_version()) {
_max_version_schema = tablet_schema;
}
}
Status BaseTablet::update_by_least_common_schema(const TabletSchemaSPtr& update_schema) {
std::lock_guard wrlock(_meta_lock);
CHECK(_max_version_schema->schema_version() >= update_schema->schema_version());
TabletSchemaSPtr final_schema;
bool check_column_size = true;
RETURN_IF_ERROR(vectorized::schema_util::get_least_common_schema(
{_max_version_schema, update_schema}, _max_version_schema, final_schema,
check_column_size));
_max_version_schema = final_schema;
VLOG_DEBUG << "dump updated tablet schema: " << final_schema->dump_structure();
return Status::OK();
}
uint32_t BaseTablet::get_real_compaction_score() const {
const auto& rs_metas = _tablet_meta->all_rs_metas();
return std::accumulate(rs_metas.begin(), rs_metas.end(), 0,
[](uint32_t score, const RowsetMetaSharedPtr& rs_meta) {
return score + rs_meta->get_compaction_score();
});
}
Status BaseTablet::capture_rs_readers_unlocked(const Versions& version_path,
std::vector<RowSetSplits>* rs_splits) const {
DCHECK(rs_splits != nullptr && rs_splits->empty());
for (auto version : version_path) {
auto it = _rs_version_map.find(version);
if (it == _rs_version_map.end()) {
VLOG_NOTICE << "fail to find Rowset in rs_version for version. tablet=" << tablet_id()
<< ", version='" << version.first << "-" << version.second;
it = _stale_rs_version_map.find(version);
if (it == _stale_rs_version_map.end()) {
return Status::Error<CAPTURE_ROWSET_READER_ERROR>(
"fail to find Rowset in stale_rs_version for version. tablet={}, "
"version={}-{}",
tablet_id(), version.first, version.second);
}
}
RowsetReaderSharedPtr rs_reader;
auto res = it->second->create_reader(&rs_reader);
if (!res.ok()) {
return Status::Error<CAPTURE_ROWSET_READER_ERROR>(
"failed to create reader for rowset:{}", it->second->rowset_id().to_string());
}
rs_splits->emplace_back(std::move(rs_reader));
}
return Status::OK();
}
// snapshot manager may call this api to check if version exists, so that
// the version maybe not exist
RowsetSharedPtr BaseTablet::get_rowset_by_version(const Version& version,
bool find_in_stale) const {
auto iter = _rs_version_map.find(version);
if (iter == _rs_version_map.end()) {
if (find_in_stale) {
return get_stale_rowset_by_version(version);
}
return nullptr;
}
return iter->second;
}
RowsetSharedPtr BaseTablet::get_stale_rowset_by_version(const Version& version) const {
auto iter = _stale_rs_version_map.find(version);
if (iter == _stale_rs_version_map.end()) {
VLOG_NOTICE << "no rowset for version:" << version << ", tablet: " << tablet_id();
return nullptr;
}
return iter->second;
}
// Already under _meta_lock
RowsetSharedPtr BaseTablet::get_rowset_with_max_version() const {
Version max_version = _tablet_meta->max_version();
if (max_version.first == -1) {
return nullptr;
}
auto iter = _rs_version_map.find(max_version);
if (iter == _rs_version_map.end()) {
DCHECK(false) << "invalid version:" << max_version;
return nullptr;
}
return iter->second;
}
Status BaseTablet::get_all_rs_id(int64_t max_version, RowsetIdUnorderedSet* rowset_ids) const {
std::shared_lock rlock(_meta_lock);
return get_all_rs_id_unlocked(max_version, rowset_ids);
}
Status BaseTablet::get_all_rs_id_unlocked(int64_t max_version,
RowsetIdUnorderedSet* rowset_ids) const {
// Ensure that the obtained versions of rowsets are continuous
Version spec_version(0, max_version);
Versions version_path;
auto st = _timestamped_version_tracker.capture_consistent_versions(spec_version, &version_path);
if (!st.ok()) [[unlikely]] {
return st;
}
for (auto& ver : version_path) {
if (ver.second == 1) {
// [0-1] rowset is empty for each tablet, skip it
continue;
}
auto it = _rs_version_map.find(ver);
if (it == _rs_version_map.end()) {
return Status::Error<CAPTURE_ROWSET_ERROR, false>(
"fail to find Rowset for version. tablet={}, version={}", tablet_id(),
ver.to_string());
}
rowset_ids->emplace(it->second->rowset_id());
}
return Status::OK();
}
Versions BaseTablet::get_missed_versions(int64_t spec_version) const {
DCHECK(spec_version > 0) << "invalid spec_version: " << spec_version;
Versions existing_versions;
{
std::shared_lock rdlock(_meta_lock);
for (const auto& rs : _tablet_meta->all_rs_metas()) {
existing_versions.emplace_back(rs->version());
}
}
return calc_missed_versions(spec_version, std::move(existing_versions));
}
Versions BaseTablet::get_missed_versions_unlocked(int64_t spec_version) const {
DCHECK(spec_version > 0) << "invalid spec_version: " << spec_version;
Versions existing_versions;
for (const auto& rs : _tablet_meta->all_rs_metas()) {
existing_versions.emplace_back(rs->version());
}
return calc_missed_versions(spec_version, std::move(existing_versions));
}
void BaseTablet::_print_missed_versions(const Versions& missed_versions) const {
std::stringstream ss;
ss << tablet_id() << " has " << missed_versions.size() << " missed version:";
// print at most 10 version
for (int i = 0; i < 10 && i < missed_versions.size(); ++i) {
ss << missed_versions[i] << ",";
}
LOG(WARNING) << ss.str();
}
bool BaseTablet::_reconstruct_version_tracker_if_necessary() {
double orphan_vertex_ratio = _timestamped_version_tracker.get_orphan_vertex_ratio();
if (orphan_vertex_ratio >= config::tablet_version_graph_orphan_vertex_ratio) {
_timestamped_version_tracker.construct_versioned_tracker(
_tablet_meta->all_rs_metas(), _tablet_meta->all_stale_rs_metas());
return true;
}
return false;
}
// should use this method to get a copy of current tablet meta
// there are some rowset meta in local meta store and in in-memory tablet meta
// but not in tablet meta in local meta store
void BaseTablet::generate_tablet_meta_copy(TabletMeta& new_tablet_meta) const {
TabletMetaPB tablet_meta_pb;
{
std::shared_lock rdlock(_meta_lock);
_tablet_meta->to_meta_pb(&tablet_meta_pb);
}
generate_tablet_meta_copy_unlocked(new_tablet_meta);
}
// this is a unlocked version of generate_tablet_meta_copy()
// some method already hold the _meta_lock before calling this,
// such as EngineCloneTask::_finish_clone -> tablet->revise_tablet_meta
void BaseTablet::generate_tablet_meta_copy_unlocked(TabletMeta& new_tablet_meta) const {
TabletMetaPB tablet_meta_pb;
_tablet_meta->to_meta_pb(&tablet_meta_pb);
new_tablet_meta.init_from_pb(tablet_meta_pb);
}
Status BaseTablet::calc_delete_bitmap_between_segments(
RowsetId rowset_id, const std::vector<segment_v2::SegmentSharedPtr>& segments,
DeleteBitmapPtr delete_bitmap) {
size_t const num_segments = segments.size();
if (num_segments < 2) {
return Status::OK();
}
OlapStopWatch watch;
size_t seq_col_length = 0;
if (_tablet_meta->tablet_schema()->has_sequence_col()) {
auto seq_col_idx = _tablet_meta->tablet_schema()->sequence_col_idx();
seq_col_length = _tablet_meta->tablet_schema()->column(seq_col_idx).length() + 1;
}
size_t rowid_length = 0;
if (!_tablet_meta->tablet_schema()->cluster_key_uids().empty()) {
rowid_length = PrimaryKeyIndexReader::ROW_ID_LENGTH;
}
MergeIndexDeleteBitmapCalculator calculator;
RETURN_IF_ERROR(calculator.init(rowset_id, segments, seq_col_length, rowid_length));
RETURN_IF_ERROR(calculator.calculate_all(delete_bitmap));
delete_bitmap->add(
{rowset_id, DeleteBitmap::INVALID_SEGMENT_ID, DeleteBitmap::TEMP_VERSION_COMMON},
DeleteBitmap::ROWSET_SENTINEL_MARK);
LOG(INFO) << fmt::format(
"construct delete bitmap between segments, "
"tablet: {}, rowset: {}, number of segments: {}, bitmap count: {}, bitmap cardinality: "
"{}, cost {} (us)",
tablet_id(), rowset_id.to_string(), num_segments,
delete_bitmap->get_delete_bitmap_count(), delete_bitmap->cardinality(),
watch.get_elapse_time_us());
return Status::OK();
}
std::vector<RowsetSharedPtr> BaseTablet::get_rowset_by_ids(
const RowsetIdUnorderedSet* specified_rowset_ids) {
std::vector<RowsetSharedPtr> rowsets;
for (auto& rs : _rs_version_map) {
if (!specified_rowset_ids ||
specified_rowset_ids->find(rs.second->rowset_id()) != specified_rowset_ids->end()) {
rowsets.push_back(rs.second);
}
}
std::sort(rowsets.begin(), rowsets.end(), [](RowsetSharedPtr& lhs, RowsetSharedPtr& rhs) {
return lhs->end_version() > rhs->end_version();
});
return rowsets;
}
Status BaseTablet::lookup_row_data(const Slice& encoded_key, const RowLocation& row_location,
RowsetSharedPtr input_rowset, OlapReaderStatistics& stats,
std::string& values, bool write_to_cache) {
MonotonicStopWatch watch;
size_t row_size = 1;
watch.start();
Defer _defer([&]() {
LOG_EVERY_N(INFO, 500) << "get a single_row, cost(us):" << watch.elapsed_time() / 1000
<< ", row_size:" << row_size;
});
BetaRowsetSharedPtr rowset = std::static_pointer_cast<BetaRowset>(input_rowset);
CHECK(rowset);
const TabletSchemaSPtr tablet_schema = rowset->tablet_schema();
SegmentCacheHandle segment_cache_handle;
std::unique_ptr<segment_v2::ColumnIterator> column_iterator;
const auto& column = *DORIS_TRY(tablet_schema->column(BeConsts::ROW_STORE_COL));
RETURN_IF_ERROR(_get_segment_column_iterator(rowset, row_location.segment_id, column,
&segment_cache_handle, &column_iterator, &stats));
// get and parse tuple row
vectorized::MutableColumnPtr column_ptr = vectorized::ColumnString::create();
std::vector<segment_v2::rowid_t> rowids {static_cast<segment_v2::rowid_t>(row_location.row_id)};
RETURN_IF_ERROR(column_iterator->read_by_rowids(rowids.data(), 1, column_ptr));
assert(column_ptr->size() == 1);
auto* string_column = static_cast<vectorized::ColumnString*>(column_ptr.get());
StringRef value = string_column->get_data_at(0);
values = value.to_string();
if (write_to_cache) {
RowCache::instance()->insert({tablet_id(), encoded_key}, Slice {value.data, value.size});
}
return Status::OK();
}
Status BaseTablet::lookup_row_key(const Slice& encoded_key, TabletSchema* latest_schema,
bool with_seq_col,
const std::vector<RowsetSharedPtr>& specified_rowsets,
RowLocation* row_location, uint32_t version,
std::vector<std::unique_ptr<SegmentCacheHandle>>& segment_caches,
RowsetSharedPtr* rowset, bool with_rowid,
std::string* encoded_seq_value, OlapReaderStatistics* stats,
DeleteBitmapPtr delete_bitmap) {
SCOPED_BVAR_LATENCY(g_tablet_lookup_rowkey_latency);
size_t seq_col_length = 0;
// use the latest tablet schema to decide if the tablet has sequence column currently
const TabletSchema* schema =
(latest_schema == nullptr ? _tablet_meta->tablet_schema().get() : latest_schema);
if (schema->has_sequence_col() && with_seq_col) {
seq_col_length = schema->column(schema->sequence_col_idx()).length() + 1;
}
size_t rowid_length = 0;
if (with_rowid && !schema->cluster_key_uids().empty()) {
rowid_length = PrimaryKeyIndexReader::ROW_ID_LENGTH;
}
Slice key_without_seq =
Slice(encoded_key.get_data(), encoded_key.get_size() - seq_col_length - rowid_length);
RowLocation loc;
auto tablet_delete_bitmap =
delete_bitmap == nullptr ? _tablet_meta->delete_bitmap_ptr() : delete_bitmap;
for (size_t i = 0; i < specified_rowsets.size(); i++) {
const auto& rs = specified_rowsets[i];
const auto& segments_key_bounds = rs->rowset_meta()->get_segments_key_bounds();
int num_segments = cast_set<int>(rs->num_segments());
DCHECK_EQ(segments_key_bounds.size(), num_segments);
std::vector<uint32_t> picked_segments;
for (int j = num_segments - 1; j >= 0; j--) {
if (key_without_seq.compare(segments_key_bounds[j].max_key()) > 0 ||
key_without_seq.compare(segments_key_bounds[j].min_key()) < 0) {
continue;
}
picked_segments.emplace_back(j);
}
if (picked_segments.empty()) {
continue;
}
if (UNLIKELY(segment_caches[i] == nullptr)) {
segment_caches[i] = std::make_unique<SegmentCacheHandle>();
RETURN_IF_ERROR(SegmentLoader::instance()->load_segments(
std::static_pointer_cast<BetaRowset>(rs), segment_caches[i].get(), true, true));
}
auto& segments = segment_caches[i]->get_segments();
DCHECK_EQ(segments.size(), num_segments);
for (auto id : picked_segments) {
Status s = segments[id]->lookup_row_key(encoded_key, schema, with_seq_col, with_rowid,
&loc, stats, encoded_seq_value);
if (s.is<KEY_NOT_FOUND>()) {
continue;
}
if (!s.ok() && !s.is<KEY_ALREADY_EXISTS>()) {
return s;
}
if (s.ok() && tablet_delete_bitmap->contains_agg_without_cache(
{loc.rowset_id, loc.segment_id, version}, loc.row_id)) {
// if has sequence col, we continue to compare the sequence_id of
// all rowsets, util we find an existing key.
if (schema->has_sequence_col()) {
continue;
}
// The key is deleted, we don't need to search for it any more.
break;
}
// `st` is either OK or KEY_ALREADY_EXISTS now.
// for partial update, even if the key is already exists, we still need to
// read it's original values to keep all columns align.
*row_location = loc;
if (rowset) {
// return it's rowset
*rowset = rs;
}
// find it and return
return s;
}
}
g_tablet_pk_not_found << 1;
return Status::Error<ErrorCode::KEY_NOT_FOUND>("can't find key in all rowsets");
}
// if user pass a token, then all calculation works will submit to a threadpool,
// user can get all delete bitmaps from that token.
// if `token` is nullptr, the calculation will run in local, and user can get the result
// delete bitmap from `delete_bitmap` directly.
Status BaseTablet::calc_delete_bitmap(const BaseTabletSPtr& tablet, RowsetSharedPtr rowset,
const std::vector<segment_v2::SegmentSharedPtr>& segments,
const std::vector<RowsetSharedPtr>& specified_rowsets,
DeleteBitmapPtr delete_bitmap, int64_t end_version,
CalcDeleteBitmapToken* token, RowsetWriter* rowset_writer,
DeleteBitmapPtr tablet_delete_bitmap) {
if (specified_rowsets.empty() || segments.empty()) {
return Status::OK();
}
OlapStopWatch watch;
for (const auto& segment : segments) {
const auto& seg = segment;
if (token != nullptr) {
RETURN_IF_ERROR(token->submit(tablet, rowset, seg, specified_rowsets, end_version,
delete_bitmap, rowset_writer, tablet_delete_bitmap));
} else {
RETURN_IF_ERROR(tablet->calc_segment_delete_bitmap(
rowset, segment, specified_rowsets, delete_bitmap, end_version, rowset_writer,
tablet_delete_bitmap));
}
}
return Status::OK();
}
Status BaseTablet::calc_segment_delete_bitmap(RowsetSharedPtr rowset,
const segment_v2::SegmentSharedPtr& seg,
const std::vector<RowsetSharedPtr>& specified_rowsets,
DeleteBitmapPtr delete_bitmap, int64_t end_version,
RowsetWriter* rowset_writer,
DeleteBitmapPtr tablet_delete_bitmap) {
OlapStopWatch watch;
auto rowset_id = rowset->rowset_id();
Version dummy_version(end_version + 1, end_version + 1);
auto rowset_schema = rowset->tablet_schema();
PartialUpdateInfo* partial_update_info {nullptr};
bool is_partial_update = rowset_writer && rowset_writer->is_partial_update();
// `have_input_seq_column` is for fixed partial update only. For flexible partial update, we should use
// the skip bitmap to determine wheather a row has specified the sequence column
bool have_input_seq_column = false;
// `rids_be_overwritten` is for flexible partial update only, it records row ids that is overwritten by
// another row with higher seqeucne value
std::set<uint32_t> rids_be_overwritten;
if (is_partial_update) {
partial_update_info = rowset_writer->get_partial_update_info().get();
if (partial_update_info->is_fixed_partial_update() && rowset_schema->has_sequence_col()) {
std::vector<uint32_t> including_cids =
rowset_writer->get_partial_update_info()->update_cids;
have_input_seq_column =
rowset_schema->has_sequence_col() &&
(std::find(including_cids.cbegin(), including_cids.cend(),
rowset_schema->sequence_col_idx()) != including_cids.cend());
}
}
if (rowset_schema->num_variant_columns() > 0) {
// During partial updates, the extracted columns of a variant should not be included in the rowset schema.
// This is because the partial update for a variant needs to ignore the extracted columns.
// Otherwise, the schema types in different rowsets might be inconsistent. When performing a partial update,
// the complete variant is constructed by reading all the sub-columns of the variant.
rowset_schema = rowset_schema->copy_without_variant_extracted_columns();
}
// use for partial update
FixedReadPlan read_plan_ori;
FixedReadPlan read_plan_update;
int64_t conflict_rows = 0;
int64_t new_generated_rows = 0;
std::map<RowsetId, RowsetSharedPtr> rsid_to_rowset;
rsid_to_rowset[rowset_id] = rowset;
vectorized::Block block = rowset_schema->create_block();
vectorized::Block ordered_block = block.clone_empty();
uint32_t pos = 0;
RETURN_IF_ERROR(seg->load_pk_index_and_bf(nullptr)); // We need index blocks to iterate
const auto* pk_idx = seg->get_primary_key_index();
int total = pk_idx->num_rows();
uint32_t row_id = 0;
int32_t remaining = total;
bool exact_match = false;
std::string last_key;
int batch_size = 1024;
// The data for each segment may be lookup multiple times. Creating a SegmentCacheHandle
// will update the lru cache, and there will be obvious lock competition in multithreading
// scenarios, so using a segment_caches to cache SegmentCacheHandle.
std::vector<std::unique_ptr<SegmentCacheHandle>> segment_caches(specified_rowsets.size());
while (remaining > 0) {
std::unique_ptr<segment_v2::IndexedColumnIterator> iter;
RETURN_IF_ERROR(pk_idx->new_iterator(&iter, nullptr));
size_t num_to_read = std::min(batch_size, remaining);
auto index_type = vectorized::DataTypeFactory::instance().create_data_type(
pk_idx->type_info()->type(), 1, 0);
auto index_column = index_type->create_column();
Slice last_key_slice(last_key);
RETURN_IF_ERROR(iter->seek_at_or_after(&last_key_slice, &exact_match));
auto current_ordinal = iter->get_current_ordinal();
DCHECK(total == remaining + current_ordinal)
<< "total: " << total << ", remaining: " << remaining
<< ", current_ordinal: " << current_ordinal;
size_t num_read = num_to_read;
RETURN_IF_ERROR(iter->next_batch(&num_read, index_column));
DCHECK(num_to_read == num_read)
<< "num_to_read: " << num_to_read << ", num_read: " << num_read;
last_key = index_column->get_data_at(num_read - 1).to_string();
// exclude last_key, last_key will be read in next batch.
if (num_read == batch_size && num_read != remaining) {
num_read -= 1;
}
for (size_t i = 0; i < num_read; i++, row_id++) {
Slice key = Slice(index_column->get_data_at(i).data, index_column->get_data_at(i).size);
RowLocation loc;
// calculate row id
if (!_tablet_meta->tablet_schema()->cluster_key_uids().empty()) {
size_t seq_col_length = 0;
if (_tablet_meta->tablet_schema()->has_sequence_col()) {
seq_col_length =
_tablet_meta->tablet_schema()
->column(_tablet_meta->tablet_schema()->sequence_col_idx())
.length() +
1;
}
size_t rowid_length = PrimaryKeyIndexReader::ROW_ID_LENGTH;
Slice key_without_seq =
Slice(key.get_data(), key.get_size() - seq_col_length - rowid_length);
Slice rowid_slice =
Slice(key.get_data() + key_without_seq.get_size() + seq_col_length + 1,
rowid_length - 1);
const auto* type_info =
get_scalar_type_info<FieldType::OLAP_FIELD_TYPE_UNSIGNED_INT>();
const auto* rowid_coder = get_key_coder(type_info->type());
RETURN_IF_ERROR(rowid_coder->decode_ascending(&rowid_slice, rowid_length,
(uint8_t*)&row_id));
}
// same row in segments should be filtered
if (delete_bitmap->contains({rowset_id, seg->id(), DeleteBitmap::TEMP_VERSION_COMMON},
row_id)) {
continue;
}
DBUG_EXECUTE_IF("BaseTablet::calc_segment_delete_bitmap.inject_err", {
auto p = dp->param("percent", 0.01);
std::mt19937 gen {std::random_device {}()};
std::bernoulli_distribution inject_fault {p};
if (inject_fault(gen)) {
return Status::InternalError(
"injection error in calc_segment_delete_bitmap, "
"tablet_id={}, rowset_id={}",
tablet_id(), rowset_id.to_string());
}
});
RowsetSharedPtr rowset_find;
Status st = Status::OK();
if (tablet_delete_bitmap == nullptr) {
st = lookup_row_key(key, rowset_schema.get(), true, specified_rowsets, &loc,
cast_set<uint32_t>(dummy_version.first - 1), segment_caches,
&rowset_find);
} else {
st = lookup_row_key(key, rowset_schema.get(), true, specified_rowsets, &loc,
cast_set<uint32_t>(dummy_version.first - 1), segment_caches,
&rowset_find, true, nullptr, nullptr, tablet_delete_bitmap);
}
bool expected_st = st.ok() || st.is<KEY_NOT_FOUND>() || st.is<KEY_ALREADY_EXISTS>();
// It's a defensive DCHECK, we need to exclude some common errors to avoid core-dump
// while stress test
DCHECK(expected_st || st.is<MEM_LIMIT_EXCEEDED>())
<< "unexpected error status while lookup_row_key:" << st;
if (!expected_st) {
return st;
}
if (st.is<KEY_NOT_FOUND>()) {
continue;
}
++conflict_rows;
if (st.is<KEY_ALREADY_EXISTS>() &&
(!is_partial_update ||
(partial_update_info->is_fixed_partial_update() && have_input_seq_column))) {
// `st.is<KEY_ALREADY_EXISTS>()` means that there exists a row with the same key and larger value
// in seqeunce column.
// - If the current load is not a partial update, we just delete current row.
// - Otherwise, it means that we are doing the alignment process in publish phase due to conflicts
// during concurrent partial updates. And there exists another load which introduces a row with
// the same keys and larger sequence column value published successfully after the commit phase
// of the current load.
// - If the columns we update include sequence column, we should delete the current row becase the
// partial update on the current row has been `overwritten` by the previous one with larger sequence
// column value.
// - Otherwise, we should combine the values of the missing columns in the previous row and the values
// of the including columns in the current row into a new row.
delete_bitmap->add({rowset_id, seg->id(), DeleteBitmap::TEMP_VERSION_COMMON},
row_id);
continue;
// NOTE: for partial update which doesn't specify the sequence column, we can't use the sequence column value filled in flush phase
// as its final value. Otherwise it may cause inconsistency between replicas.
}
if (is_partial_update && rowset_writer != nullptr) {
// In publish version, record rows to be deleted for concurrent update
// For example, if version 5 and 6 update a row, but version 6 only see
// version 4 when write, and when publish version, version 5's value will
// be marked as deleted and it's update is losed.
// So here we should read version 5's columns and build a new row, which is
// consists of version 6's update columns and version 5's origin columns
// here we build 2 read plan for ori values and update values
// - for fixed partial update, we should read update columns from current load's rowset
// and read missing columns from previous rowsets to create the final block
// - for flexible partial update, we should read all columns from current load's rowset
// and read non sort key columns from previous rowsets to create the final block
// So we only need to record rows to read for both mode partial update
read_plan_ori.prepare_to_read(loc, pos);
read_plan_update.prepare_to_read(RowLocation {rowset_id, seg->id(), row_id}, pos);
// For flexible partial update, we should use skip bitmap to determine wheather
// a row has specified the sequence column. But skip bitmap should be read from the segment.
// So we record these row ids and process and filter them in `generate_new_block_for_flexible_partial_update()`
if (st.is<KEY_ALREADY_EXISTS>() &&
partial_update_info->is_flexible_partial_update()) {
rids_be_overwritten.insert(pos);
}
rsid_to_rowset[rowset_find->rowset_id()] = rowset_find;
++pos;
// delete bitmap will be calculate when memtable flush and
// publish. The two stages may see different versions.
// When there is sequence column, the currently imported data
// of rowset may be marked for deletion at memtablet flush or
// publish because the seq column is smaller than the previous
// rowset.
// just set 0 as a unified temporary version number, and update to
// the real version number later.
delete_bitmap->add(
{loc.rowset_id, loc.segment_id, DeleteBitmap::TEMP_VERSION_COMMON},
loc.row_id);
delete_bitmap->add({rowset_id, seg->id(), DeleteBitmap::TEMP_VERSION_COMMON},
row_id);
++new_generated_rows;
continue;
}
// when st = ok
delete_bitmap->add({loc.rowset_id, loc.segment_id, DeleteBitmap::TEMP_VERSION_COMMON},
loc.row_id);
}
remaining -= num_read;
}
// DCHECK_EQ(total, row_id) << "segment total rows: " << total << " row_id:" << row_id;
if (config::enable_merge_on_write_correctness_check) {
RowsetIdUnorderedSet rowsetids;
for (const auto& specified_rowset : specified_rowsets) {
rowsetids.emplace(specified_rowset->rowset_id());
VLOG_NOTICE << "[tabletID:" << tablet_id() << "]"
<< "[add_sentinel_mark_to_delete_bitmap][end_version:" << end_version << "]"
<< "add:" << specified_rowset->rowset_id();
}
add_sentinel_mark_to_delete_bitmap(delete_bitmap.get(), rowsetids);
}
if (pos > 0) {
DCHECK(partial_update_info);
if (partial_update_info->is_fixed_partial_update()) {
RETURN_IF_ERROR(generate_new_block_for_partial_update(
rowset_schema, partial_update_info, read_plan_ori, read_plan_update,
rsid_to_rowset, &block));
} else {
RETURN_IF_ERROR(generate_new_block_for_flexible_partial_update(
rowset_schema, partial_update_info, rids_be_overwritten, read_plan_ori,
read_plan_update, rsid_to_rowset, &block));
}
RETURN_IF_ERROR(sort_block(block, ordered_block));
RETURN_IF_ERROR(rowset_writer->flush_single_block(&ordered_block));
auto cost_us = watch.get_elapse_time_us();
if (config::enable_mow_verbose_log || cost_us > 10 * 1000) {
LOG(INFO) << "calc segment delete bitmap for "
<< partial_update_info->partial_update_mode_str()
<< ", tablet: " << tablet_id() << " rowset: " << rowset_id
<< " seg_id: " << seg->id() << " dummy_version: " << end_version + 1
<< " rows: " << seg->num_rows() << " conflict rows: " << conflict_rows
<< " filtered rows: " << rids_be_overwritten.size()
<< " new generated rows: " << new_generated_rows
<< " bitmap num: " << delete_bitmap->get_delete_bitmap_count()
<< " bitmap cardinality: " << delete_bitmap->cardinality()
<< " cost: " << cost_us << "(us)";
}
return Status::OK();
}
auto cost_us = watch.get_elapse_time_us();
if (config::enable_mow_verbose_log || cost_us > 10 * 1000) {
LOG(INFO) << "calc segment delete bitmap, tablet: " << tablet_id()
<< " rowset: " << rowset_id << " seg_id: " << seg->id()
<< " dummy_version: " << end_version + 1 << " rows: " << seg->num_rows()
<< " conflict rows: " << conflict_rows
<< " bitmap num: " << delete_bitmap->get_delete_bitmap_count()
<< " bitmap cardinality: " << delete_bitmap->cardinality() << " cost: " << cost_us
<< "(us)";
}
return Status::OK();
}
Status BaseTablet::sort_block(vectorized::Block& in_block, vectorized::Block& output_block) {
vectorized::MutableBlock mutable_input_block =
vectorized::MutableBlock::build_mutable_block(&in_block);
vectorized::MutableBlock mutable_output_block =
vectorized::MutableBlock::build_mutable_block(&output_block);
std::shared_ptr<RowInBlockComparator> vec_row_comparator =
std::make_shared<RowInBlockComparator>(_tablet_meta->tablet_schema());
vec_row_comparator->set_block(&mutable_input_block);
std::vector<std::unique_ptr<RowInBlock>> row_in_blocks;
DCHECK(in_block.rows() <= std::numeric_limits<int>::max());
row_in_blocks.reserve(in_block.rows());
for (size_t i = 0; i < in_block.rows(); ++i) {
row_in_blocks.emplace_back(std::make_unique<RowInBlock>(i));
}
std::sort(row_in_blocks.begin(), row_in_blocks.end(),
[&](const std::unique_ptr<RowInBlock>& l,
const std::unique_ptr<RowInBlock>& r) -> bool {
auto value = (*vec_row_comparator)(l.get(), r.get());
DCHECK(value != 0) << "value equel when sort block, l_pos: " << l->_row_pos
<< " r_pos: " << r->_row_pos;
return value < 0;
});
std::vector<uint32_t> row_pos_vec;
row_pos_vec.reserve(in_block.rows());
for (auto& block : row_in_blocks) {
row_pos_vec.emplace_back(block->_row_pos);
}
return mutable_output_block.add_rows(&in_block, row_pos_vec.data(),
row_pos_vec.data() + in_block.rows());
}
// fetch value by row column
Status BaseTablet::fetch_value_through_row_column(RowsetSharedPtr input_rowset,
const TabletSchema& tablet_schema, uint32_t segid,
const std::vector<uint32_t>& rowids,
const std::vector<uint32_t>& cids,
vectorized::Block& block) {
MonotonicStopWatch watch;
watch.start();
Defer _defer([&]() {
LOG_EVERY_N(INFO, 500) << "fetch_value_by_rowids, cost(us):" << watch.elapsed_time() / 1000
<< ", row_batch_size:" << rowids.size();
});
BetaRowsetSharedPtr rowset = std::static_pointer_cast<BetaRowset>(input_rowset);
CHECK(rowset);
CHECK(tablet_schema.has_row_store_for_all_columns());
SegmentCacheHandle segment_cache_handle;
std::unique_ptr<segment_v2::ColumnIterator> column_iterator;
OlapReaderStatistics stats;
const auto& column = *DORIS_TRY(tablet_schema.column(BeConsts::ROW_STORE_COL));
RETURN_IF_ERROR(_get_segment_column_iterator(rowset, segid, column, &segment_cache_handle,
&column_iterator, &stats));
// get and parse tuple row
vectorized::MutableColumnPtr column_ptr = vectorized::ColumnString::create();
RETURN_IF_ERROR(column_iterator->read_by_rowids(rowids.data(), rowids.size(), column_ptr));
assert(column_ptr->size() == rowids.size());
auto* string_column = static_cast<vectorized::ColumnString*>(column_ptr.get());
vectorized::DataTypeSerDeSPtrs serdes;
serdes.resize(cids.size());
std::unordered_map<uint32_t, uint32_t> col_uid_to_idx;
std::vector<std::string> default_values;
default_values.resize(cids.size());
for (int i = 0; i < cids.size(); ++i) {
const TabletColumn& tablet_column = tablet_schema.column(cids[i]);
vectorized::DataTypePtr type =
vectorized::DataTypeFactory::instance().create_data_type(tablet_column);
col_uid_to_idx[tablet_column.unique_id()] = i;
default_values[i] = tablet_column.default_value();
serdes[i] = type->get_serde();
}
vectorized::JsonbSerializeUtil::jsonb_to_block(serdes, *string_column, col_uid_to_idx, block,
default_values, {});
return Status::OK();
}
Status BaseTablet::fetch_value_by_rowids(RowsetSharedPtr input_rowset, uint32_t segid,
const std::vector<uint32_t>& rowids,
const TabletColumn& tablet_column,
vectorized::MutableColumnPtr& dst) {
MonotonicStopWatch watch;
watch.start();
Defer _defer([&]() {
LOG_EVERY_N(INFO, 500) << "fetch_value_by_rowids, cost(us):" << watch.elapsed_time() / 1000
<< ", row_batch_size:" << rowids.size();
});
// read row data
BetaRowsetSharedPtr rowset = std::static_pointer_cast<BetaRowset>(input_rowset);
CHECK(rowset);
SegmentCacheHandle segment_cache_handle;
std::unique_ptr<segment_v2::ColumnIterator> column_iterator;
OlapReaderStatistics stats;
RETURN_IF_ERROR(_get_segment_column_iterator(rowset, segid, tablet_column,
&segment_cache_handle, &column_iterator, &stats));
RETURN_IF_ERROR(column_iterator->read_by_rowids(rowids.data(), rowids.size(), dst));
return Status::OK();
}
const signed char* BaseTablet::get_delete_sign_column_data(const vectorized::Block& block,
size_t rows_at_least) {
if (const vectorized::ColumnWithTypeAndName* delete_sign_column =
block.try_get_by_name(DELETE_SIGN);
delete_sign_column != nullptr) {
const auto& delete_sign_col =
reinterpret_cast<const vectorized::ColumnInt8&>(*(delete_sign_column->column));
if (delete_sign_col.size() >= rows_at_least) {
return delete_sign_col.get_data().data();
}
}
return nullptr;
};
Status BaseTablet::generate_default_value_block(const TabletSchema& schema,
const std::vector<uint32_t>& cids,
const std::vector<std::string>& default_values,
const vectorized::Block& ref_block,
vectorized::Block& default_value_block) {
auto mutable_default_value_columns = default_value_block.mutate_columns();
for (auto i = 0; i < cids.size(); ++i) {
const auto& column = schema.column(cids[i]);
if (column.has_default_value()) {
const auto& default_value = default_values[i];
vectorized::ReadBuffer rb(const_cast<char*>(default_value.c_str()),
default_value.size());
RETURN_IF_ERROR(ref_block.get_by_position(i).type->from_string(
rb, mutable_default_value_columns[i].get()));
}
}
default_value_block.set_columns(std::move(mutable_default_value_columns));
return Status::OK();
}
Status BaseTablet::generate_new_block_for_partial_update(
TabletSchemaSPtr rowset_schema, const PartialUpdateInfo* partial_update_info,
const FixedReadPlan& read_plan_ori, const FixedReadPlan& read_plan_update,
const std::map<RowsetId, RowsetSharedPtr>& rsid_to_rowset,
vectorized::Block* output_block) {
// do partial update related works
// 1. read columns by read plan
// 2. generate new block
// 3. write a new segment and modify rowset meta
// 4. mark current keys deleted
CHECK(output_block);
auto full_mutable_columns = output_block->mutate_columns();
const auto& missing_cids = partial_update_info->missing_cids;
const auto& update_cids = partial_update_info->update_cids;
auto old_block = rowset_schema->create_block_by_cids(missing_cids);
auto update_block = rowset_schema->create_block_by_cids(update_cids);
// rowid in the final block(start from 0, increase continuously) -> rowid to read in update_block