50024b39cd
Co-authored-by: tino247 <tino247@126.com> Co-authored-by: BinChenn <binchenn.bc@gmail.com> Co-authored-by: HaHaJeff <jeffzhouhhh@gmail.com>
73 lines
2.1 KiB
C++
73 lines
2.1 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 OCEANBASE_SHARE_OB_TABLET_CHECKSUM_ITERATOR_H_
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#define OCEANBASE_SHARE_OB_TABLET_CHECKSUM_ITERATOR_H_
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#include "lib/list/ob_dlist.h"
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#include "lib/string/ob_sql_string.h"
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#include "share/schema/ob_schema_struct.h"
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#include "share/ob_tablet_checksum_operator.h"
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namespace oceanbase
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{
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namespace common
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{
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class ObISQLClient;
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}
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namespace share
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{
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class ObTabletLSPair;
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class ObTabletChecksumIterator
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{
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public:
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ObTabletChecksumIterator()
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: is_inited_(false), tenant_id_(OB_INVALID_TENANT_ID),
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compaction_scn_(), checksum_items_(), cur_idx_(0),
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sql_proxy_(NULL)
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{}
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virtual ~ObTabletChecksumIterator() { reset(); }
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int init(const uint64_t tenant_id,
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common::ObISQLClient *sql_proxy);
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void reset();
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void reuse();
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int next(ObTabletChecksumItem &item);
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void set_compaction_scn(const SCN &compaction_scn) { compaction_scn_ = compaction_scn; }
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private:
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int fetch_next_batch();
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private:
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// Keep BATCH_FETCH_COUNT consistent with MAX_BATCH_COUNT in ob_tablet_checksum_operator.h for efficiency.
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// E.g., if BATCH_FETCH_COUNT = 100 and MAX_BATCH_COUNT = 99, then it will launch two query in fetch_next_batch.
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// The second query only get one row, which is inefficient.
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static const int64_t BATCH_FETCH_COUNT = 99;
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bool is_inited_;
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uint64_t tenant_id_;
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SCN compaction_scn_;
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common::ObSEArray<ObTabletChecksumItem, BATCH_FETCH_COUNT> checksum_items_;
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int64_t cur_idx_;
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common::ObISQLClient *sql_proxy_;
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DISALLOW_COPY_AND_ASSIGN(ObTabletChecksumIterator);
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};
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} // namespace share
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} // namespace oceanbase
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#endif // OCEANBASE_SHARE_OB_TABLET_CHECKSUM_ITERATOR_H_
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