50 lines
2.2 KiB
C++
50 lines
2.2 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_OB_EXPR_EXTRACT_H_
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#define OCEANBASE_SQL_OB_EXPR_EXTRACT_H_
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#include "share/object/ob_obj_cast.h"
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#include "sql/engine/expr/ob_expr_operator.h"
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namespace oceanbase {
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namespace sql {
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class ObPhysicalPlanCtx;
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class ObExprExtract : public ObFuncExprOperator {
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public:
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explicit ObExprExtract(common::ObIAllocator& alloc);
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virtual ~ObExprExtract();
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virtual int calc_result_type2(ObExprResType& type, ObExprResType& date_unit, ObExprResType& date,
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common::ObExprTypeCtx& type_ctx) const override;
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template <typename T>
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static int calc(T& result, const int64_t date_unit, const T& date, common::ObObjType date_type,
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const common::ObCastMode cast_mode, const common::ObTimeZoneInfo* tz_info, const int64_t cur_ts_value);
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template <typename T>
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static int calc_oracle(T& result, const int64_t date_unit, const T& date, common::ObObjType type,
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const ObSQLSessionInfo* session, common::ObIAllocator* calc_buf);
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virtual int calc_result2(common::ObObj& result, const common::ObObj& date_unit, const common::ObObj& date,
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common::ObExprCtx& expr_ctx) const override;
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virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
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static int calc_extract_oracle(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int calc_extract_mysql(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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private:
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int set_result_type_oracle(
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common::ObExprTypeCtx& type_ctx, const ObExprResType& date_unit, ObExprResType& res_type) const;
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprExtract);
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};
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} // namespace sql
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} // namespace oceanbase
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#endif // OCEANBASE_SQL_OB_EXPR_EXTRACT_H_
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