ericpai commented on pull request #5273:
URL: https://github.com/apache/iotdb/pull/5273#issuecomment-1073466311
> ## Description
> Add some functions to support select logical expression in select clauses.
>
> ### Details
> Now you can select logical expressions like a>b, fore example
>
> ```sql
> select a, a>10, !(a<20) && a<30 from root.test;
> ```
>
> **output**:
>
> ```
> IoTDB> select a, a>10, !(a<20) && a<30 from root.test;
>
+-----------------------------+-----------+----------------+--------------------------------------+
> | Time|root.test.a|root.test.a > 10|!root.test.a <
20 & (root.test.a < 30)|
>
+-----------------------------+-----------+----------------+--------------------------------------+
> |1970-01-01T08:00:00.001+08:00| 23| true|
true|
> |1970-01-01T08:00:00.002+08:00| 33| true|
false|
> |1970-01-01T08:00:00.004+08:00| 13| true|
false|
> |1970-01-01T08:00:00.005+08:00| 26| true|
true|
> |1970-01-01T08:00:00.008+08:00| 1| false|
false|
> |1970-01-01T08:00:00.010+08:00| 23| true|
true|
>
+-----------------------------+-----------+----------------+--------------------------------------+
> ```
>
> ```
>
> ```
@flashzxi Could you add some docs about this excellent feature in English
and Chinese :)
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