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oceanbase-admin
138
src/sql/engine/expr/ob_expr_minus.h
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138
src/sql/engine/expr/ob_expr_minus.h
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/**
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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_MINUS_H_
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#define _OB_EXPR_MINUS_H_
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#include <math.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 ObExprCGCtx;
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class ObExprMinus : public ObArithExprOperator {
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public:
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ObExprMinus();
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explicit ObExprMinus(common::ObIAllocator& alloc, ObExprOperatorType type = T_OP_MINUS);
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virtual ~ObExprMinus(){};
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virtual int calc_result_type2(
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ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const;
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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;
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static int calc(common::ObObj& res, const common::ObObj& ojb1, const common::ObObj& obj2,
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common::ObIAllocator* allocator, common::ObScale scale);
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static int calc(common::ObObj& res, const common::ObObj& ojb1, const common::ObObj& obj2, common::ObExprCtx& expr_ctx,
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common::ObScale scale);
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static int minus_datetime(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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virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
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private:
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OB_INLINE static int minus_int(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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OB_INLINE static int minus_uint(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 minus_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 minus_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 minus_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 minus_number(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 calc_datetime_minus(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
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common::ObExprCtx& expr_ctx, common::ObScale calc_scale);
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static int calc_timestamp_minus(
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common::ObObj& res, const common::ObObj& left, const common::ObObj& right, const common::ObTimeZoneInfo* tz_info);
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DISALLOW_COPY_AND_ASSIGN(ObExprMinus);
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public:
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static int minus_null(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_int_int(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_int_uint(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_uint_uint(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_uint_int(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_float_float(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_double_double(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_number_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_intervalym_intervalym(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_intervalds_intervalds(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_datetime_intervalym(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_datetime_intervalds(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestamptz_intervalym(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestampltz_intervalym(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestampnano_intervalym(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestamptz_intervalds(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestamp_tiny_intervalds(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_timestamp_timestamp(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_datetime_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_datetime_datetime_oracle(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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static int minus_datetime_datetime(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
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private:
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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 - 0 : safe
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// 1 - 1 : safe
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// 0 - 1 = 1 : overflow
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// 0 - 1 = 0 : safe
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// 1 - 0 = 1 : safe
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// 1 - 0 = 0 : underflow
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return (val1 >> SHIFT_OFFSET) != (res >> SHIFT_OFFSET) && (val2 >> SHIFT_OFFSET) == (res >> SHIFT_OFFSET);
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}
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OB_INLINE static bool is_int_uint_out_of_range(int64_t val1, uint64_t val2, uint64_t res)
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{
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// top digit:
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// 0 - 0 = 0 : safe
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// 0 - 0 = 1 : underflow
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// 0 - 1 : underflow
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// 1 - 0 : underflow
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// 1 - 1 : underflow
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return !(0 == (val1 >> SHIFT_OFFSET) && 0 == (val2 >> SHIFT_OFFSET) && 0 == (res >> SHIFT_OFFSET));
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}
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OB_INLINE static bool is_uint_int_out_of_range(uint64_t val1, int64_t val2, uint64_t res)
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{
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// top digit:
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// 0 - 1 : safe
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// 1 - 1 = 0 : overflow
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// 1 - 1 = 1 : safe
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// 0 - 0 = 0 : safe
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// 0 - 0 = 1 : underflow
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// 0 - 1 : safe
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return (val1 >> SHIFT_OFFSET) == (static_cast<uint64_t>(val2) >> SHIFT_OFFSET) &&
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(val1 >> SHIFT_OFFSET) != (res >> SHIFT_OFFSET);
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}
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OB_INLINE static bool is_uint_uint_out_of_range(uint64_t val1, uint64_t val2, uint64_t res)
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{
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UNUSED(res);
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return val1 < val2;
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}
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private:
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static ObArithFunc minus_funcs_[common::ObMaxTC];
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static ObArithFunc agg_minus_funcs_[common::ObMaxTC];
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static const int64_t SHIFT_OFFSET = 63;
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};
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// Minus expr for aggregation, different with ObExprMinus:
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// No overflow check for double type.
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class ObExprAggMinus : public ObExprMinus {
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public:
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explicit ObExprAggMinus(common::ObIAllocator& alloc) : ObExprMinus(alloc, T_OP_AGG_MINUS)
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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_MINUS_H_ */
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