46 lines
1.5 KiB
C++
46 lines
1.5 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_SQL_EXECUTOR_OB_LOCAL_IDENTITY_TASK_SPLITER_
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#define OCEANBASE_SQL_EXECUTOR_OB_LOCAL_IDENTITY_TASK_SPLITER_
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#include "sql/executor/ob_task_spliter.h"
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namespace oceanbase
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{
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namespace sql
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{
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class ObPhysicalPlan;
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class ObTaskInfo;
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// 该类仅用于只生成一个本地task的情况，而在executor阶段如果判断到
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// 切分类型为ObTaskSpliter::LOCAL_IDENTITY_SPLIT则会直接优化掉，不走切分job的流程，
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// 相当于这个类的大部分函数都不会被调用到
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class ObLocalIdentityTaskSpliter : public ObTaskSpliter
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{
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public:
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ObLocalIdentityTaskSpliter();
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virtual ~ObLocalIdentityTaskSpliter();
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virtual int get_next_task(ObTaskInfo *&task);
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inline virtual TaskSplitType get_type() const { return ObTaskSpliter::LOCAL_IDENTITY_SPLIT; }
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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObLocalIdentityTaskSpliter);
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private:
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ObTaskInfo *task_;
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};
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}
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}
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#endif /* OCEANBASE_SQL_EXECUTOR_OB_LOCAL_IDENTITY_TASK_SPLITER_ */
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//// end of header file
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