2d19a9d8f5
Co-authored-by: leslieyuchen <leslieyuchen@gmail.com> Co-authored-by: Charles0429 <xiezhenjiang@gmail.com> Co-authored-by: raywill <hustos@gmail.com>
55 lines
2.0 KiB
C++
55 lines
2.0 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_OB_LOG_TOPK_H
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#define OCEANBASE_SQL_OB_LOG_TOPK_H
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#include "sql/optimizer/ob_logical_operator.h"
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#include "sql/optimizer/ob_log_set.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 ObLogTopk : public ObLogicalOperator
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{
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public:
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ObLogTopk(ObLogPlan &plan)
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: ObLogicalOperator(plan),
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minimum_row_count_(0),
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topk_precision_(0),
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topk_limit_count_(NULL),
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topk_limit_offset_(NULL)
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{}
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virtual ~ObLogTopk() {}
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inline ObRawExpr *get_topk_limit_count() const { return topk_limit_count_; }
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inline ObRawExpr *get_topk_limit_offset() const { return topk_limit_offset_;}
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int set_topk_params(ObRawExpr *limit_count,
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ObRawExpr *limit_offset,
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int64_t minimum_row_cuont,
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int64_t topk_precision);
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virtual int est_cost() override;
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virtual int est_width() override;
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virtual int get_op_exprs(ObIArray<ObRawExpr*> &all_exprs) override;
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inline int64_t get_minimum_row_count() const {return minimum_row_count_;}
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inline int64_t get_topk_precision() const {return topk_precision_;}
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int get_topk_output_exprs(ObIArray<ObRawExpr *> &output_exprs);
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virtual int get_plan_item_info(PlanText &plan_text,
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ObSqlPlanItem &plan_item) override;
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private:
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int64_t minimum_row_count_;
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int64_t topk_precision_;
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ObRawExpr *topk_limit_count_;
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ObRawExpr *topk_limit_offset_;
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};
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}
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}
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#endif // OCEANBASE_SQL_OB_LOG_TOPK_H
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