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src/sql/engine/expr/ob_expr_int_div.h Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#ifndef OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_INT_DIV_H_
#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_INT_DIV_H_
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {
class ObExprIntDiv : public ObArithExprOperator {
public:
ObExprIntDiv();
explicit ObExprIntDiv(common::ObIAllocator& alloc);
virtual ~ObExprIntDiv(){};
virtual int calc_result_type2(
ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_result2(
common::ObObj& res, const common::ObObj& ojb1, const common::ObObj& obj2, common::ObExprCtx& expr_ctx) const;
static int calc(common::ObObj& res, const common::ObObj& ojb1, const common::ObObj& obj2,
common::ObIAllocator* allocator, common::ObScale scale);
static int div_int_int(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
static int div_int_uint(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
static int div_uint_int(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
static int div_uint_uint(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
static int div_number(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
// temporary used, remove after all expr converted
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
private:
OB_INLINE static int intdiv_int(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
common::ObIAllocator* allocator, common::ObScale scale);
OB_INLINE static int intdiv_uint(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
common::ObIAllocator* allocator, common::ObScale scale);
static int intdiv_number(common::ObObj& res, const common::ObObj& left, const common::ObObj& right,
common::ObIAllocator* allocator, common::ObScale scale);
static ObArithFunc int_div_funcs_[common::ObMaxTC];
OB_INLINE static bool is_int_int_out_of_range(int64_t val1, int64_t val2, int64_t res)
{
// top digit:
// 0 div 0 : safe.
// 0 div 1 : safe.
// 1 div 0 : safe.
// 1 div 1 = 0 : safe.
// 1 div 1 = 1 : overflow.
return (val1 >> 63) && (val2 >> 63) && (res >> 63);
}
DISALLOW_COPY_AND_ASSIGN(ObExprIntDiv);
};
} // namespace sql
} // namespace oceanbase
#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_INT_DIV_H_ */