/**
 * 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_OB_EXPR_FUNC_CEIL_
#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_FUNC_CEIL_

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

namespace oceanbase {
namespace sql {

class ObExprCeilFloor : public ObFuncExprOperator {
  static const int16_t MAX_LIMIT_WITH_SCALE = 17;
  static const int16_t MAX_LIMIT_WITHOUT_SCALE = 18;

public:
  ObExprCeilFloor(common::ObIAllocator& alloc, ObExprOperatorType type, const char* name, int32_t param_num,
      int32_t dimension = NOT_ROW_DIMENSION);

  virtual ~ObExprCeilFloor();
  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
  virtual int calc_result1(
      common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx, bool is_ceil) const;
  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;

private:
  // disallow copy
  DISALLOW_COPY_AND_ASSIGN(ObExprCeilFloor);
};

class ObExprFuncCeil : public ObExprCeilFloor {
public:
  explicit ObExprFuncCeil(common::ObIAllocator& alloc);
  virtual ~ObExprFuncCeil();
  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
  virtual int calc_result1(common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx) const;

private:
  // disallow copy
  DISALLOW_COPY_AND_ASSIGN(ObExprFuncCeil);
};

class ObExprFuncCeiling : public ObExprCeilFloor {
public:
  explicit ObExprFuncCeiling(common::ObIAllocator& alloc);
  virtual ~ObExprFuncCeiling();
  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
  virtual int calc_result1(common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx) const;

private:
  // disallow copy
  DISALLOW_COPY_AND_ASSIGN(ObExprFuncCeiling);
};

class ObExprFuncFloor : public ObExprCeilFloor {
public:
  explicit ObExprFuncFloor(common::ObIAllocator& alloc);
  virtual ~ObExprFuncFloor();
  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
  virtual int calc_result1(common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx) const;

private:
  // disallow copy
  DISALLOW_COPY_AND_ASSIGN(ObExprFuncFloor);
};
}  // namespace sql
}  // namespace oceanbase
#endif  // OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_FUNC_CEIL_
