62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OB_SINGLE_MERGE_H_
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#define OB_SINGLE_MERGE_H_
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#include "ob_multiple_merge.h"
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#include "ob_fuse_row_cache_fetcher.h"
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#include "storage/blocksstable/ob_fuse_row_cache.h"
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namespace oceanbase
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{
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namespace storage
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{
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class ObSingleMerge : public ObMultipleMerge
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{
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public:
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ObSingleMerge();
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virtual ~ObSingleMerge();
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int open(const blocksstable::ObDatumRowkey &rowkey);
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virtual void reset();
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virtual void reuse() override;
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protected:
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virtual int calc_scan_range() override;
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virtual int construct_iters() override;
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virtual int is_range_valid() const override;
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virtual int inner_get_next_row(blocksstable::ObDatumRow &row);
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virtual void collect_merge_stat(ObTableStoreStat &stat) const override;
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private:
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virtual int get_table_row(const int64_t table_idx,
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const common::ObIArray<ObITable *> &tables,
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blocksstable::ObDatumRow &fuse_row,
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bool &final_result,
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bool &has_uncommited_row);
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virtual int get_and_fuse_cache_row(const int64_t read_snapshot_version,
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const int64_t multi_version_start,
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blocksstable::ObDatumRow &fuse_row,
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bool &final_result,
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bool &have_uncommited_row,
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bool &need_update_fuse_cache);
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private:
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const blocksstable::ObDatumRowkey *rowkey_;
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blocksstable::ObFuseRowValueHandle handle_;
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private:
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static const int64_t SINGLE_GET_FUSE_ROW_CACHE_PUT_COUNT_THRESHOLD = 50;
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ObFuseRowCacheFetcher fuse_row_cache_fetcher_;
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObSingleMerge);
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};
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} /* namespace storage */
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} /* namespace oceanbase */
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#endif /* OB_SINGLE_MERGE_H_ */
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