/**
 * 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_OB_EXPR_STR_TO_DATE_H_
#define OCEANBASE_SQL_OB_EXPR_STR_TO_DATE_H_

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

namespace oceanbase {
namespace sql {
class ObExprStrToDate : public ObFuncExprOperator {
public:
  explicit ObExprStrToDate(common::ObIAllocator& alloc);
  virtual ~ObExprStrToDate();
  virtual int calc_result_type2(
      ObExprResType& type, ObExprResType& date, ObExprResType& format, common::ObExprTypeCtx& type_ctx) const override;
  virtual int calc_result2(common::ObObj& result, const common::ObObj& date, const common::ObObj& format,
      common::ObExprCtx& expr_ctx) const override;
  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;

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

class ObExprOracleToDate : public ObExprToTemporalBase {
public:
  explicit ObExprOracleToDate(common::ObIAllocator& alloc) : ObExprToTemporalBase(alloc, T_FUN_SYS_TO_DATE, N_TO_DATE)
  {}
  virtual ~ObExprOracleToDate()
  {}

  int set_my_result_from_ob_time(common::ObExprCtx& expr_ctx, common::ObTime& ob_time, common::ObObj& result) const;
  common::ObObjType get_my_target_obj_type() const
  {
    return common::ObDateTimeType;
  }
};

}  // namespace sql
}  // namespace oceanbase
#endif  // OCEANBASE_SQL_OB_EXPR_STR_TO_DATE_H_
