62 lines
2.6 KiB
C++
62 lines
2.6 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_TIME_STMAP_DIFF_H_
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#define _OCEANBASE_SQL_OB_EXPR_TIME_STMAP_DIFF_H_
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#include "lib/ob_name_def.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 ObExprTimeStampDiff : public ObFuncExprOperator {
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public:
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explicit ObExprTimeStampDiff(common::ObIAllocator& alloc);
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virtual ~ObExprTimeStampDiff();
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virtual int calc_result_type3(ObExprResType& type, ObExprResType& unit, ObExprResType& left, ObExprResType& right,
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common::ObExprTypeCtx& type_ctx) const override;
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virtual int calc_result3(common::ObObj& result, const common::ObObj& unit, const common::ObObj& left,
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const common::ObObj& right, common::ObExprCtx& expr_ctx) const override;
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virtual common::ObCastMode get_cast_mode() const override
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{
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return CM_NULL_ON_WARN;
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}
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static int eval_timestamp_diff(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res);
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virtual int cg_expr(ObExprCGCtx& ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
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private:
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static int calc(int64_t& res, bool& is_null, int64_t unit_value, int64_t usec_left, int64_t usec_right,
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const common::ObTimeZoneInfo* tz_info);
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static int calc_month_diff(
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const int64_t& left, const int64_t& right, const common::ObTimeZoneInfo* tz_info, int64_t& diff);
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static int adjust_sub_one(const common::ObTime* p_min, const common::ObTime* p_max, int64_t& bias);
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprTimeStampDiff);
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};
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inline int ObExprTimeStampDiff::calc_result_type3(ObExprResType& type, ObExprResType& unit, ObExprResType& left,
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ObExprResType& right, common::ObExprTypeCtx& type_ctx) const
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{
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UNUSED(type_ctx);
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UNUSED(unit);
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type.set_int();
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type.set_scale(common::DEFAULT_SCALE_FOR_INTEGER);
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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// set calc type
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left.set_calc_type(common::ObTimestampType);
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right.set_calc_type(common::ObTimestampType);
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return common::OB_SUCCESS;
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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_TIME_STMAP_DIFF_H_
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