[Bug] There is a logical error in the precedence of arithmetic operators.
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- Java
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- 30 天内合并 PR
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描述
### Search before asking
- [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.
### Version
version 1.3.3 (Build: ad95a7e)
### Describe the bug and provide the minimal reproduce step
```
DROP DATABASE root.db0
CREATE DATABASE root.db0
CREATE TIMESERIES root.db0.t1 WITH datatype=INT32;
INSERT INTO root.db0(timestamp, t1) VALUES (1641024000000, 0);
# query 1
SELECT (t1 * -1000) FROM root.db0
# query 2
SELECT (t1 * (-1000)) FROM root.db0
```
### What did you expect to see?
Query 1 returned result set: **-0**
Query 2 returned result set: **-0**
### What did you see instead?
Query 1 returned result set: **-1000**
Query 2 returned result set: **-0**
### Anything else?
Dear IoTDB team, In the above scenario, we combine the `unary negation operator` with column t1 and perform a multiplication operation to examine the result returned by IotDB. In Query 1, we did not enclose `-t1` in parentheses to treat it as a whole, and the returned result was **-1000**, which does not match our expectations. In principle, the unary negation operator should have a higher precedence than the multiplication operator, and the presence or absence of parentheses should not affect the final result.
### Are you willing to submit a PR?
- [x] I'm willing to submit a PR!
贡献指南
调研方向
Payload 未指明任何实现文件或测试。首先针对 IoTDB 运行 issue 中的最小复现,并比较 query 1 与 query 2;当两个表达式都产生预期的等价结果,且一元否定的优先级高于乘法时,即表示完成。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- java, sql
- 领域
- databases
- Issue 类型
- 缺陷
- 难度
- 3/5
- 预计耗时
- 1-2 天
- 活跃度
- 停滞
- 描述清晰度
- 基本清楚
- 新手友好度
- 38/100