80 lines
3.2 KiB
C++
80 lines
3.2 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_ENGINE_EXPR_OB_EXPR_INT_DIV_H_
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_INT_DIV_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 ObExprIntDiv: public ObArithExprOperator
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{
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public:
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ObExprIntDiv();
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explicit ObExprIntDiv(common::ObIAllocator &alloc);
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virtual ~ObExprIntDiv() {};
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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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static int calc(common::ObObj &res,
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const common::ObObj &ojb1,
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const common::ObObj &obj2,
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common::ObIAllocator *allocator,
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common::ObScale scale);
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static int div_int_int(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int div_int_uint(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int div_uint_int(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int div_uint_uint(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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// temporary used, remove after all expr converted
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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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private:
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OB_INLINE static int intdiv_int(common::ObObj &res,
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const common::ObObj &left,
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const common::ObObj &right,
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common::ObIAllocator *allocator,
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common::ObScale scale);
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OB_INLINE static int intdiv_uint(common::ObObj &res,
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const common::ObObj &left,
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const common::ObObj &right,
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common::ObIAllocator *allocator,
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common::ObScale scale);
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static int intdiv_number(common::ObObj &res,
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const common::ObObj &left,
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const common::ObObj &right,
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common::ObIAllocator *allocator,
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common::ObScale scale);
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static ObArithFunc int_div_funcs_[common::ObMaxTC];
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OB_INLINE static bool is_int_int_out_of_range(int64_t val1, int64_t val2, int64_t res)
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{
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// top digit:
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// 0 div 0 : safe.
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// 0 div 1 : safe.
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// 1 div 0 : safe.
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// 1 div 1 = 0 : safe.
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// 1 div 1 = 1 : overflow.
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return (val1 >> 63) && (val2 >> 63) && (res >> 63);
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}
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DISALLOW_COPY_AND_ASSIGN(ObExprIntDiv);
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};
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}// sql
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}// oceanbase
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#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_INT_DIV_H_ */
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