/**
 * 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_TRUNCATE_H_
#define _OB_EXPR_TRUNCATE_H_

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

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

  virtual int calc_result_type2(ObExprResType &type,
                                ObExprResType &type1,
                                ObExprResType &type2,
                                common::ObExprTypeCtx &type_ctx) const override;

  virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
                            ObExpr &rt_expr) const;
  static int set_trunc_val(common::ObObj &result,
                    common::number::ObNumber &nmb,
                    common::ObExprCtx &expr_ctx,
                    common::ObObjType res_type);
private:

  DISALLOW_COPY_AND_ASSIGN(ObExprTruncate);
};
} // namespace sql
} // namespace oceanbase

#endif // _OB_EXPR_TRUNCATE_H_