explain_stmt.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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         http://license.coscl.org.cn/MulanPSL2
THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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See the Mulan PSL v2 for more details. */
 
//
// Created by Wangyunlai on 2022/12/27.
//
 
#pragma once
 
#include <memory>
#include "sql/stmt/stmt.h"
 
class ExplainStmt : public Stmt 
{
public:
  ExplainStmt(std::unique_ptr<Stmt> child_stmt);
  virtual ~ExplainStmt() = default;
 
  StmtType type() const override
  {
    return StmtType::EXPLAIN;
  }
 
  Stmt *child() const
  {
    return child_stmt_.get();
  }
 
  static RC create(Db *db, const ExplainSqlNode &query, Stmt *&stmt);
 
private:
  std::unique_ptr<Stmt> child_stmt_;
};