/**
 * 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 OB_EXPR_TO_INTERVAL_H
#define OB_EXPR_TO_INTERVAL_H

#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {

class ObExprToYMInterval : public ObFuncExprOperator {
public:
  explicit ObExprToYMInterval(common::ObIAllocator& alloc);
  virtual ~ObExprToYMInterval();
  int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const override;
  int calc_result1(common::ObObj& result, const common::ObObj& obj, common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_to_yminterval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprToYMInterval);
};

class ObExprToDSInterval : public ObFuncExprOperator {
public:
  explicit ObExprToDSInterval(common::ObIAllocator& alloc);
  virtual ~ObExprToDSInterval();
  int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const override;
  int calc_result1(common::ObObj& result, const common::ObObj& obj, common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_to_dsinterval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprToDSInterval);
};

class ObExprNumToYMInterval : public ObFuncExprOperator {
public:
  explicit ObExprNumToYMInterval(common::ObIAllocator& alloc);
  virtual ~ObExprNumToYMInterval();
  int calc_result_type2(
      ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const override;
  int calc_result2(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      common::ObExprCtx& expr_ctx) const override;
  template <class T>
  static int calc_result_common(
      const T& obj1, const T& obj2, common::ObIAllocator& calc_buf, common::ObIntervalYMValue& ym_value);
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_num_to_yminterval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprNumToYMInterval);
};

class ObExprNumToDSInterval : public ObFuncExprOperator {
public:
  explicit ObExprNumToDSInterval(common::ObIAllocator& alloc);
  virtual ~ObExprNumToDSInterval();
  int calc_result_type2(
      ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const override;
  int calc_result2(common::ObObj& result, const common::ObObj& obj1, const common::ObObj& obj2,
      common::ObExprCtx& expr_ctx) const override;
  template <class R, class T>
  static int calc_result_common(R& result, const T& obj1, const T& obj2, common::ObIAllocator& calc_buf);
  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
  static int calc_num_to_dsinterval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);

private:
  DISALLOW_COPY_AND_ASSIGN(ObExprNumToDSInterval);
};

}  // namespace sql
}  // namespace oceanbase

#endif  // OB_EXPR_TO_INTERVAL_H
