text: /**
   * 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_
  