56 lines
1.9 KiB
C++
56 lines
1.9 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_SQL_OPTIMIZER_OB_LOG_COUNT_H_
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#define OB_SQL_OPTIMIZER_OB_LOG_COUNT_H_
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#include "sql/optimizer/ob_logical_operator.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 ObLogCount: public ObLogicalOperator
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{
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public:
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ObLogCount(ObLogPlan &plan)
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: ObLogicalOperator(plan),
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rownum_limit_expr_(NULL)
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{}
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virtual ~ObLogCount() {}
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virtual int generate_link_sql_post(GenLinkStmtPostContext &link_ctx) override;
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inline ObRawExpr *get_rownum_limit_expr() const { return rownum_limit_expr_; }
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inline void set_rownum_limit_expr(ObRawExpr *rownum_limit_expr) { rownum_limit_expr_ = rownum_limit_expr; }
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virtual int est_cost() override;
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virtual int est_width() override;
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virtual int re_est_cost(EstimateCostInfo ¶m, double &card, double &cost) override;
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int inner_est_cost(double &child_card,
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double &child_cost,
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bool need_re_est_child_cost,
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double sel,
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double &op_cost);
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virtual int print_my_plan_annotation(char *buf,
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int64_t &buf_len,
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int64_t &pos,
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ExplainType type);
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virtual int get_op_exprs(ObIArray<ObRawExpr*> &all_exprs) override;
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private:
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ObRawExpr *rownum_limit_expr_;
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DISALLOW_COPY_AND_ASSIGN(ObLogCount);
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};
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} /* namespace sql */
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} /* namespace oceanbase */
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#endif /* OB_SQL_OPTIMIZER_OB_LOG_COUNT_H_ */
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