79 lines
3.8 KiB
C++
79 lines
3.8 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 _OB_EXPR_DIV_H_
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#define _OB_EXPR_DIV_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 ObExprDiv : public ObArithExprOperator {
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public:
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ObExprDiv();
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explicit ObExprDiv(common::ObIAllocator& alloc, ObExprOperatorType type = T_OP_DIV);
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virtual ~ObExprDiv()
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{}
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virtual int calc_result_type2(
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ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const override;
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virtual int calc_result2(
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common::ObObj& result, const common::ObObj& left, const common::ObObj& right, common::ObExprCtx& expr_ctx) const override;
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static int calc(common::ObObj& res, const common::ObObj& obj1, const common::ObObj& obj2,
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common::ObIAllocator* allocator, common::ObScale calc_scale);
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static int calc_for_avg(common::ObObj& res, const common::ObObj& obj1, const common::ObObj& obj2,
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common::ObExprCtx& expr_ctx, common::ObScale res_scale);
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static int calc_for_avg(common::ObDatum& result, const common::ObDatum& sum, const int64_t count, ObEvalCtx& expr_ctx,
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const common::ObObjType type);
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static int div_float(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int div_double(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int div_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int div_intervalym_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int div_intervalds_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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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 div_float(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObIAllocator* allocator, common::ObScale scale);
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static int div_double(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObIAllocator* allocator, common::ObScale scale);
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static int div_double_no_overflow(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObIAllocator* allocator, common::ObScale scale);
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static int div_number(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObIAllocator* allocator, common::ObScale calc_scale);
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static int div_interval(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObIAllocator* allocator, common::ObScale calc_scale);
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static int div_float(
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common::ObDatum& result, const common::ObDatum& left, const common::ObDatum& right, ObEvalCtx& ctx);
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static int div_number(common::ObDatum& result, const common::ObDatum& left, const common::ObDatum& right,
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ObEvalCtx& ctx, const ObExpr& expr);
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DISALLOW_COPY_AND_ASSIGN(ObExprDiv);
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private:
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static ObArithFunc div_funcs_[common::ObMaxTC];
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static ObArithFunc avg_div_funcs_[common::ObMaxTC];
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static const common::ObScale DIV_CALC_SCALE;
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static const common::ObScale DIV_MAX_CALC_SCALE;
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};
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// Div expr for aggregation, different with ObExprDiv:
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// No overflow check for double type.
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class ObExprAggDiv : public ObExprDiv {
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public:
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explicit ObExprAggDiv(common::ObIAllocator& alloc) : ObExprDiv(alloc, T_OP_AGG_DIV)
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{}
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};
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} // namespace sql
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} // namespace oceanbase
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#endif /* _OB_EXPR_DIV_H_ */
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