/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef _OCEANBASE_SQL_ENGINE_EXPR_NVL2_ORACLE_H_
#define _OCEANBASE_SQL_ENGINE_EXPR_NVL2_ORACLE_H_

#include "sql/engine/expr/ob_expr_operator.h"
#include "sql/engine/expr/ob_expr_nvl.h"

namespace oceanbase {
namespace sql {
using namespace oceanbase::common;
class ObExprNvl2Oracle : public ObFuncExprOperator {
public:
  explicit ObExprNvl2Oracle(ObIAllocator& alloc);
  virtual ~ObExprNvl2Oracle();

  virtual int calc_result_type3(ObExprResType& type, ObExprResType& type1, ObExprResType& type2, ObExprResType& type3,
      ObExprTypeCtx& type_ctx) const;

  virtual int calc_result3(
      ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObObj& obj3, ObExprCtx& expr_ctx) const;

  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const;

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprNvl2Oracle);
};
}  // namespace sql
}  // namespace oceanbase

#endif