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[fix](merge-on-write) segcompaction should process delete bitmap if n…
…ecessary (#38369) (#39707) ## Proposed changes Issue Number: close #xxx cherry-pick #38369 and #38800
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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. | ||
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| #pragma once | ||
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| #include <map> | ||
| #include <vector> | ||
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| #include "olap/olap_common.h" | ||
| #include "olap/utils.h" | ||
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| namespace doris { | ||
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| // Simple verion of rowid conversion, for segcompaction | ||
| // convert rows from several segments to rows in 1 segment | ||
| class SimpleRowIdConversion { | ||
| public: | ||
| SimpleRowIdConversion(const RowsetId& rowset_id) : _rowst_id(rowset_id) {}; | ||
| ~SimpleRowIdConversion() = default; | ||
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| // resize segment rowid map to its rows num | ||
| void reset_segment_map(const std::map<uint32_t, uint32_t>& num_rows) { | ||
| _cur_dst_segment_rowid = 0; | ||
| for (auto seg_rows : num_rows) { | ||
| _segments_rowid_map.emplace(seg_rows.first, | ||
| std::vector<uint32_t>(seg_rows.second, UINT32_MAX)); | ||
| } | ||
| } | ||
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| // add row id to the map | ||
| void add(const std::vector<RowLocation>& rss_row_ids) { | ||
| for (auto& item : rss_row_ids) { | ||
| if (item.row_id == -1) { | ||
| continue; | ||
| } | ||
| DCHECK(_segments_rowid_map.find(item.segment_id) != _segments_rowid_map.end() && | ||
| _segments_rowid_map[item.segment_id].size() > item.row_id); | ||
| _segments_rowid_map[item.segment_id][item.row_id] = _cur_dst_segment_rowid++; | ||
| } | ||
| } | ||
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| // get destination RowLocation | ||
| // return non-zero if the src RowLocation does not exist | ||
| int get(const RowLocation& src) const { | ||
| auto it = _segments_rowid_map.find(src.segment_id); | ||
| if (it == _segments_rowid_map.end()) { | ||
| return -1; | ||
| } | ||
| const auto& rowid_map = it->second; | ||
| if (src.row_id >= rowid_map.size() || UINT32_MAX == rowid_map[src.row_id]) { | ||
| return -1; | ||
| } | ||
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| return rowid_map[src.row_id]; | ||
| } | ||
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| private: | ||
| // key: index indicates src segment. | ||
| // value: index indicates row id of source segment, value indicates row id of destination | ||
| // segment. UINT32_MAX indicates current row not exist. | ||
| std::map<uint32_t, std::vector<uint32_t>> _segments_rowid_map; | ||
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| // dst rowset id | ||
| RowsetId _rowst_id; | ||
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| // current rowid of dst segment | ||
| std::uint32_t _cur_dst_segment_rowid = 0; | ||
| }; | ||
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| } // namespace doris |
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