81 lines
2.9 KiB
C++
81 lines
2.9 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_DATE_DIFF_H_
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#define _OCEANBASE_SQL_OB_EXPR_DATE_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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{
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namespace sql
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{
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class ObExprDateDiff : public ObFuncExprOperator
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{
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public:
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explicit ObExprDateDiff(common::ObIAllocator &alloc);
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virtual ~ObExprDateDiff();
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virtual int calc_result_type2(ObExprResType &type,
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ObExprResType &left,
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ObExprResType &right,
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common::ObExprTypeCtx &type_ctx) const;
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virtual common::ObCastMode get_cast_mode() const { return CM_NULL_ON_WARN;}
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int eval_date_diff(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum);
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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprDateDiff);
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};
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inline int ObExprDateDiff::calc_result_type2(ObExprResType &type,
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ObExprResType &left,
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ObExprResType &right,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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UNUSED(left);
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UNUSED(right);
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type.set_int();
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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type.set_scale(common::DEFAULT_SCALE_FOR_INTEGER);
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//set calc type
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left.set_calc_type(common::ObDateType);
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right.set_calc_type(common::ObDateType);
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return common::OB_SUCCESS;
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}
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class ObExprMonthsBetween : public ObFuncExprOperator
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{
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public:
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explicit ObExprMonthsBetween(common::ObIAllocator &alloc);
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virtual ~ObExprMonthsBetween();
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virtual int calc_result_type2(ObExprResType &type,
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ObExprResType &type1,
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ObExprResType &type2,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int eval_months_between(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum);
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private:
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprMonthsBetween);
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};
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} //sql
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} //oceanbase
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#endif //_OCEANBASE_SQL_OB_EXPR_DATE_DIFF_H_
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