predicate_physical_operator.h

/* Copyright (c) 2021 OceanBase and/or its affiliates. All rights reserved.
miniob is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
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See the Mulan PSL v2 for more details. */
 
//
// Created by WangYunlai on 2022/6/27.
//
 
#pragma once
 
#include <memory>
#include "sql/operator/physical_operator.h"
#include "sql/expr/expression.h"
 
class FilterStmt;
 
class PredicatePhysicalOperator : public PhysicalOperator
{
public:
  PredicatePhysicalOperator(std::unique_ptr<Expression> expr);
 
  virtual ~PredicatePhysicalOperator() = default;
 
  PhysicalOperatorType type() const override
  {
    return PhysicalOperatorType::PREDICATE;
  }
 
  RC open(Trx *trx) override;
  RC next() override;
  RC close() override;
 
  Tuple *current_tuple() override;
 
private:
  std::unique_ptr<Expression> expression_;
};