WinkerDu opened a new issue, #2482:
URL: https://github.com/apache/arrow-datafusion/issues/2482
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
As discuss in #1179 , there is bug when Numeric, String, Boolean comparisons
work with literal `NULL`
**Toproduce**
```
> select * from (VALUES (1, 'foo' ,2.3), (2, 'bar', 5.4)) as t;
+---------+---------+---------+
| column1 | column2 | column3 |
+---------+---------+---------+
| 1 | foo | 2.3 |
| 2 | bar | 5.4 |
+---------+---------+---------+
2 rows in set. Query took 0.004 seconds.
> select column1 < null from (VALUES (1, 'foo' ,2.3), (2, 'bar', 5.4)) as t;
Plan("'Int64 < Utf8' can't be evaluated because there isn't a common type to
coerce the types to")
> select column2 < null from (VALUES (1, 'foo' ,2.3), (2, 'bar', 5.4)) as t;
ArrowError(ExternalError(Internal("compute_utf8_op_scalar for 'lt' failed to
cast literal value NULL")))
> select column3 < null from (VALUES (1, 'foo' ,2.3), (2, 'bar', 5.4)) as t;
Plan("'Float64 < Utf8' can't be evaluated because there isn't a common type
to coerce the types to")
```
**Describe the solution you'd like**
- Introduces `null_coercion` to `comparison_eq_coercion` and
`comparison_order_coercion`
- Enhances binary expression macros to support `NULL` scalar value comparing
with array, like `binary_array_op_dyn_scalar`
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