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doris/be/src/vec/exec/volap_scanner.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 "vec/exec/volap_scanner.h"
#include <memory>
#include "olap/storage_engine.h"
#include "runtime/runtime_state.h"
#include "vec/core/block.h"
#include "vec/exec/volap_scan_node.h"
#include "vec/exprs/vexpr_context.h"
namespace doris::vectorized {
VOlapScanner::VOlapScanner(RuntimeState* runtime_state, VOlapScanNode* parent, bool aggregation,
bool need_agg_finalize, const TPaloScanRange& scan_range,
MemTracker* tracker)
: _runtime_state(runtime_state),
_parent(parent),
_tuple_desc(parent->_tuple_desc),
_id(-1),
_is_open(false),
_aggregation(aggregation),
_need_agg_finalize(need_agg_finalize),
_version(-1),
_mem_tracker(tracker) {
_tablet_schema = std::make_shared<TabletSchema>();
}
Status VOlapScanner::prepare(
const TPaloScanRange& scan_range, const std::vector<OlapScanRange*>& key_ranges,
const std::vector<TCondition>& filters,
const std::vector<std::pair<string, std::shared_ptr<IBloomFilterFuncBase>>>& bloom_filters,
const std::vector<FunctionFilter>& function_filters) {
SCOPED_CONSUME_MEM_TRACKER(_mem_tracker);
set_tablet_reader();
// set limit to reduce end of rowset and segment mem use
_tablet_reader->set_batch_size(
_parent->limit() == -1
? _parent->_runtime_state->batch_size()
: std::min(static_cast<int64_t>(_parent->_runtime_state->batch_size()),
_parent->limit()));
// Get olap table
TTabletId tablet_id = scan_range.tablet_id;
SchemaHash schema_hash = strtoul(scan_range.schema_hash.c_str(), nullptr, 10);
_version = strtoul(scan_range.version.c_str(), nullptr, 10);
{
std::string err;
_tablet = StorageEngine::instance()->tablet_manager()->get_tablet(tablet_id, true, &err);
if (_tablet.get() == nullptr) {
std::stringstream ss;
ss << "failed to get tablet. tablet_id=" << tablet_id
<< ", with schema_hash=" << schema_hash << ", reason=" << err;
LOG(WARNING) << ss.str();
return Status::InternalError(ss.str());
}
_tablet_schema->copy_from(*_tablet->tablet_schema());
if (!_parent->_olap_scan_node.columns_desc.empty() &&
_parent->_olap_scan_node.columns_desc[0].col_unique_id >= 0) {
// Originally scanner get TabletSchema from tablet object in BE.
// To support lightweight schema change for adding / dropping columns,
// tabletschema is bounded to rowset and tablet's schema maybe outdated,
// so we have to use schema from a query plan witch FE puts it in query plans.
_tablet_schema->clear_columns();
for (const auto& column_desc : _parent->_olap_scan_node.columns_desc) {
_tablet_schema->append_column(TabletColumn(column_desc));
}
}
{
std::shared_lock rdlock(_tablet->get_header_lock());
const RowsetSharedPtr rowset = _tablet->rowset_with_max_version();
if (rowset == nullptr) {
std::stringstream ss;
ss << "fail to get latest version of tablet: " << tablet_id;
LOG(WARNING) << ss.str();
return Status::InternalError(ss.str());
}
// acquire tablet rowset readers at the beginning of the scan node
// to prevent this case: when there are lots of olap scanners to run for example 10000
// the rowsets maybe compacted when the last olap scanner starts
Version rd_version(0, _version);
Status acquire_reader_st =
_tablet->capture_rs_readers(rd_version, &_tablet_reader_params.rs_readers);
if (!acquire_reader_st.ok()) {
LOG(WARNING) << "fail to init reader.res=" << acquire_reader_st;
std::stringstream ss;
ss << "failed to initialize storage reader. tablet=" << _tablet->full_name()
<< ", res=" << acquire_reader_st
<< ", backend=" << BackendOptions::get_localhost();
return Status::InternalError(ss.str());
}
}
}
{
// Initialize tablet_reader_params
RETURN_IF_ERROR(
_init_tablet_reader_params(key_ranges, filters, bloom_filters, function_filters));
}
return Status::OK();
}
Status VOlapScanner::open() {
SCOPED_TIMER(_parent->_reader_init_timer);
SCOPED_CONSUME_MEM_TRACKER(_mem_tracker);
if (_conjunct_ctxs.size() > _parent->_direct_conjunct_size) {
_use_pushdown_conjuncts = true;
}
_runtime_filter_marks.resize(_parent->runtime_filter_descs().size(), false);
auto res = _tablet_reader->init(_tablet_reader_params);
if (!res.ok()) {
std::stringstream ss;
ss << "failed to initialize storage reader. tablet="
<< _tablet_reader_params.tablet->full_name() << ", res=" << res
<< ", backend=" << BackendOptions::get_localhost();
return Status::InternalError(ss.str());
}
return Status::OK();
}
TabletStorageType VOlapScanner::get_storage_type() {
int local_reader = 0;
for (const auto& reader : _tablet_reader_params.rs_readers) {
if (reader->rowset()->rowset_meta()->resource_id().empty()) {
local_reader++;
}
}
int total_reader = _tablet_reader_params.rs_readers.size();
if (local_reader == total_reader) {
return TabletStorageType::STORAGE_TYPE_LOCAL;
} else if (local_reader == 0) {
return TabletStorageType::STORAGE_TYPE_REMOTE;
}
return TabletStorageType::STORAGE_TYPE_REMOTE_AND_LOCAL;
}
// it will be called under tablet read lock because capture rs readers need
Status VOlapScanner::_init_tablet_reader_params(
const std::vector<OlapScanRange*>& key_ranges, const std::vector<TCondition>& filters,
const std::vector<std::pair<string, std::shared_ptr<IBloomFilterFuncBase>>>& bloom_filters,
const std::vector<FunctionFilter>& function_filters) {
// if the table with rowset [0-x] or [0-1] [2-y], and [0-1] is empty
bool single_version =
(_tablet_reader_params.rs_readers.size() == 1 &&
_tablet_reader_params.rs_readers[0]->rowset()->start_version() == 0 &&
!_tablet_reader_params.rs_readers[0]
->rowset()
->rowset_meta()
->is_segments_overlapping()) ||
(_tablet_reader_params.rs_readers.size() == 2 &&
_tablet_reader_params.rs_readers[0]->rowset()->rowset_meta()->num_rows() == 0 &&
_tablet_reader_params.rs_readers[1]->rowset()->start_version() == 2 &&
!_tablet_reader_params.rs_readers[1]
->rowset()
->rowset_meta()
->is_segments_overlapping());
_tablet_reader_params.direct_mode = _aggregation || single_version;
RETURN_IF_ERROR(_init_return_columns(!_tablet_reader_params.direct_mode));
_tablet_reader_params.tablet = _tablet;
_tablet_reader_params.tablet_schema = _tablet_schema;
_tablet_reader_params.reader_type = READER_QUERY;
_tablet_reader_params.aggregation = _aggregation;
_tablet_reader_params.version = Version(0, _version);
// Condition
for (auto& filter : filters) {
_tablet_reader_params.conditions.push_back(filter);
}
std::copy(bloom_filters.cbegin(), bloom_filters.cend(),
std::inserter(_tablet_reader_params.bloom_filters,
_tablet_reader_params.bloom_filters.begin()));
std::copy(function_filters.cbegin(), function_filters.cend(),
std::inserter(_tablet_reader_params.function_filters,
_tablet_reader_params.function_filters.begin()));
// Range
for (auto key_range : key_ranges) {
if (key_range->begin_scan_range.size() == 1 &&
key_range->begin_scan_range.get_value(0) == NEGATIVE_INFINITY) {
continue;
}
_tablet_reader_params.start_key_include = key_range->begin_include;
_tablet_reader_params.end_key_include = key_range->end_include;
_tablet_reader_params.start_key.push_back(key_range->begin_scan_range);
_tablet_reader_params.end_key.push_back(key_range->end_scan_range);
}
_tablet_reader_params.profile = _parent->runtime_profile();
_tablet_reader_params.runtime_state = _runtime_state;
_tablet_reader_params.origin_return_columns = &_return_columns;
_tablet_reader_params.tablet_columns_convert_to_null_set = &_tablet_columns_convert_to_null_set;
if (_tablet_reader_params.direct_mode) {
_tablet_reader_params.return_columns = _return_columns;
} else {
// we need to fetch all key columns to do the right aggregation on storage engine side.
for (size_t i = 0; i < _tablet_schema->num_key_columns(); ++i) {
_tablet_reader_params.return_columns.push_back(i);
}
for (auto index : _return_columns) {
if (_tablet_schema->column(index).is_key()) {
continue;
} else {
_tablet_reader_params.return_columns.push_back(index);
}
}
}
// If a agg node is this scan node direct parent
// we will not call agg object finalize method in scan node,
// to avoid the unnecessary SerDe and improve query performance
_tablet_reader_params.need_agg_finalize = _need_agg_finalize;
if (!config::disable_storage_page_cache) {
_tablet_reader_params.use_page_cache = true;
}
_tablet_reader_params.delete_bitmap = &_tablet->tablet_meta()->delete_bitmap();
return Status::OK();
}
Status VOlapScanner::_init_return_columns(bool need_seq_col) {
for (auto slot : _tuple_desc->slots()) {
if (!slot->is_materialized()) {
continue;
}
int32_t index = slot->col_unique_id() >= 0
? _tablet_schema->field_index(slot->col_unique_id())
: _tablet_schema->field_index(slot->col_name());
if (index < 0) {
std::stringstream ss;
ss << "field name is invalid. field=" << slot->col_name();
LOG(WARNING) << ss.str();
return Status::InternalError(ss.str());
}
_return_columns.push_back(index);
if (slot->is_nullable() && !_tablet_schema->column(index).is_nullable()) {
_tablet_columns_convert_to_null_set.emplace(index);
}
}
// expand the sequence column
if (_tablet_schema->has_sequence_col() && need_seq_col) {
bool has_replace_col = false;
for (auto col : _return_columns) {
if (_tablet_schema->column(col).aggregation() ==
FieldAggregationMethod::OLAP_FIELD_AGGREGATION_REPLACE) {
has_replace_col = true;
break;
}
}
if (auto sequence_col_idx = _tablet_schema->sequence_col_idx();
has_replace_col && std::find(_return_columns.begin(), _return_columns.end(),
sequence_col_idx) == _return_columns.end()) {
_return_columns.push_back(sequence_col_idx);
}
}
if (_return_columns.empty()) {
return Status::InternalError("failed to build storage scanner, no materialized slot!");
}
return Status::OK();
}
Status VOlapScanner::get_block(RuntimeState* state, vectorized::Block* block, bool* eof) {
// only empty block should be here
DCHECK(block->rows() == 0);
SCOPED_CONSUME_MEM_TRACKER(_mem_tracker);
int64_t raw_rows_threshold = raw_rows_read() + config::doris_scanner_row_num;
if (!block->mem_reuse()) {
for (const auto slot_desc : _tuple_desc->slots()) {
block->insert(ColumnWithTypeAndName(slot_desc->get_empty_mutable_column(),
slot_desc->get_data_type_ptr(),
slot_desc->col_name()));
}
}
{
SCOPED_TIMER(_parent->_scan_timer);
do {
// Read one block from block reader
auto res = _tablet_reader->next_block_with_aggregation(block, nullptr, nullptr, eof);
if (!res) {
std::stringstream ss;
ss << "Internal Error: read storage fail. res=" << res
<< ", tablet=" << _tablet->full_name()
<< ", backend=" << BackendOptions::get_localhost();
return res;
}
_num_rows_read += block->rows();
_update_realtime_counter();
RETURN_IF_ERROR(
VExprContext::filter_block(_vconjunct_ctx, block, _tuple_desc->slots().size()));
} while (block->rows() == 0 && !(*eof) && raw_rows_read() < raw_rows_threshold);
}
// NOTE:
// There is no need to check raw_bytes_threshold since block->rows() == 0 is checked first.
// But checking raw_bytes_threshold is still added here for consistency with raw_rows_threshold
// and olap_scanner.cpp.
return Status::OK();
}
void VOlapScanner::_update_realtime_counter() {
auto& stats = _tablet_reader->stats();
COUNTER_UPDATE(_parent->_read_compressed_counter, stats.compressed_bytes_read);
_compressed_bytes_read += stats.compressed_bytes_read;
_tablet_reader->mutable_stats()->compressed_bytes_read = 0;
COUNTER_UPDATE(_parent->_raw_rows_counter, stats.raw_rows_read);
// if raw_rows_read is reset, scanNode will scan all table rows which may cause BE crash
_raw_rows_read += stats.raw_rows_read;
_tablet_reader->mutable_stats()->raw_rows_read = 0;
}
Status VOlapScanner::close(RuntimeState* state) {
if (_is_closed) {
return Status::OK();
}
if (_vconjunct_ctx) {
_vconjunct_ctx->close(state);
}
// olap scan node will call scanner.close() when finished
// will release resources here
// if not clear rowset readers in read_params here
// readers will be release when runtime state deconstructed but
// deconstructor in reader references runtime state
// so that it will core
_tablet_reader_params.rs_readers.clear();
update_counter();
_tablet_reader.reset();
Expr::close(_conjunct_ctxs, state);
_is_closed = true;
return Status::OK();
}
void VOlapScanner::update_counter() {
if (_has_update_counter) {
return;
}
auto& stats = _tablet_reader->stats();
COUNTER_UPDATE(_parent->rows_read_counter(), _num_rows_read);
COUNTER_UPDATE(_parent->_rows_pushed_cond_filtered_counter, _num_rows_pushed_cond_filtered);
COUNTER_UPDATE(_parent->_io_timer, stats.io_ns);
COUNTER_UPDATE(_parent->_read_compressed_counter, stats.compressed_bytes_read);
_compressed_bytes_read += stats.compressed_bytes_read;
COUNTER_UPDATE(_parent->_decompressor_timer, stats.decompress_ns);
COUNTER_UPDATE(_parent->_read_uncompressed_counter, stats.uncompressed_bytes_read);
COUNTER_UPDATE(_parent->bytes_read_counter(), stats.bytes_read);
COUNTER_UPDATE(_parent->_block_load_timer, stats.block_load_ns);
COUNTER_UPDATE(_parent->_block_load_counter, stats.blocks_load);
COUNTER_UPDATE(_parent->_block_fetch_timer, stats.block_fetch_ns);
COUNTER_UPDATE(_parent->_block_seek_timer, stats.block_seek_ns);
COUNTER_UPDATE(_parent->_block_seek_counter, stats.block_seek_num);
COUNTER_UPDATE(_parent->_block_convert_timer, stats.block_convert_ns);
COUNTER_UPDATE(_parent->_raw_rows_counter, stats.raw_rows_read);
// if raw_rows_read is reset, scanNode will scan all table rows which may cause BE crash
_raw_rows_read += _tablet_reader->mutable_stats()->raw_rows_read;
// COUNTER_UPDATE(_parent->_filtered_rows_counter, stats.num_rows_filtered);
COUNTER_UPDATE(_parent->_vec_cond_timer, stats.vec_cond_ns);
COUNTER_UPDATE(_parent->_short_cond_timer, stats.short_cond_ns);
COUNTER_UPDATE(_parent->_block_init_timer, stats.block_init_ns);
COUNTER_UPDATE(_parent->_block_init_seek_timer, stats.block_init_seek_ns);
COUNTER_UPDATE(_parent->_block_init_seek_counter, stats.block_init_seek_num);
COUNTER_UPDATE(_parent->_first_read_timer, stats.first_read_ns);
COUNTER_UPDATE(_parent->_first_read_seek_timer, stats.block_first_read_seek_ns);
COUNTER_UPDATE(_parent->_first_read_seek_counter, stats.block_first_read_seek_num);
COUNTER_UPDATE(_parent->_lazy_read_timer, stats.lazy_read_ns);
COUNTER_UPDATE(_parent->_lazy_read_seek_timer, stats.block_lazy_read_seek_ns);
COUNTER_UPDATE(_parent->_lazy_read_seek_counter, stats.block_lazy_read_seek_num);
COUNTER_UPDATE(_parent->_output_col_timer, stats.output_col_ns);
COUNTER_UPDATE(_parent->_rows_vec_cond_counter, stats.rows_vec_cond_filtered);
COUNTER_UPDATE(_parent->_stats_filtered_counter, stats.rows_stats_filtered);
COUNTER_UPDATE(_parent->_bf_filtered_counter, stats.rows_bf_filtered);
COUNTER_UPDATE(_parent->_del_filtered_counter, stats.rows_del_filtered);
COUNTER_UPDATE(_parent->_del_filtered_counter, stats.rows_del_by_bitmap);
COUNTER_UPDATE(_parent->_del_filtered_counter, stats.rows_vec_del_cond_filtered);
COUNTER_UPDATE(_parent->_conditions_filtered_counter, stats.rows_conditions_filtered);
COUNTER_UPDATE(_parent->_key_range_filtered_counter, stats.rows_key_range_filtered);
COUNTER_UPDATE(_parent->_index_load_timer, stats.index_load_ns);
size_t timer_count = sizeof(stats.general_debug_ns) / sizeof(*stats.general_debug_ns);
for (size_t i = 0; i < timer_count; ++i) {
COUNTER_UPDATE(_parent->_general_debug_timer[i], stats.general_debug_ns[i]);
}
COUNTER_UPDATE(_parent->_total_pages_num_counter, stats.total_pages_num);
COUNTER_UPDATE(_parent->_cached_pages_num_counter, stats.cached_pages_num);
COUNTER_UPDATE(_parent->_bitmap_index_filter_counter, stats.rows_bitmap_index_filtered);
COUNTER_UPDATE(_parent->_bitmap_index_filter_timer, stats.bitmap_index_filter_timer);
COUNTER_UPDATE(_parent->_filtered_segment_counter, stats.filtered_segment_number);
COUNTER_UPDATE(_parent->_total_segment_counter, stats.total_segment_number);
DorisMetrics::instance()->query_scan_bytes->increment(_compressed_bytes_read);
DorisMetrics::instance()->query_scan_rows->increment(_raw_rows_read);
_tablet->query_scan_bytes->increment(_compressed_bytes_read);
_tablet->query_scan_rows->increment(_raw_rows_read);
_tablet->query_scan_count->increment(1);
_has_update_counter = true;
}
} // namespace doris::vectorized
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