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src/sql/engine/expr/ob_expr_extract.h Normal file
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/**
* 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_EXTRACT_H_
#define OCEANBASE_SQL_OB_EXPR_EXTRACT_H_
#include "share/object/ob_obj_cast.h"
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {
class ObPhysicalPlanCtx;
class ObExprExtract : public ObFuncExprOperator {
public:
explicit ObExprExtract(common::ObIAllocator& alloc);
virtual ~ObExprExtract();
virtual int calc_result_type2(
ObExprResType& type, ObExprResType& date_unit, ObExprResType& date, common::ObExprTypeCtx& type_ctx) const;
template <typename T>
static int calc(T& result, const int64_t date_unit, const T& date, common::ObObjType date_type,
const common::ObCastMode cast_mode, const common::ObTimeZoneInfo* tz_info, const int64_t cur_ts_value);
template <typename T>
static int calc_oracle(T& result, const int64_t date_unit, const T& date, common::ObObjType type,
const ObSQLSessionInfo* session, common::ObIAllocator* calc_buf);
virtual int calc_result2(common::ObObj& result, const common::ObObj& date_unit, const common::ObObj& date,
common::ObExprCtx& expr_ctx) const;
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int calc_extract_oracle(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
static int calc_extract_mysql(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
int set_result_type_oracle(
common::ObExprTypeCtx& type_ctx, const ObExprResType& date_unit, ObExprResType& res_type) const;
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprExtract);
};
} // namespace sql
} // namespace oceanbase
#endif // OCEANBASE_SQL_OB_EXPR_EXTRACT_H_