loneylee opened a new issue, #5405:
URL: https://github.com/apache/incubator-gluten/issues/5405
### Description
If users query data through BI tools.
The BI tools may generate SQL similar to
```
to_date(
from_unixtime(
unix_timestamp(dateType, 'yyyyMMdd')
)
)
```
to convert string strings to dates.
Under ch backend, the StringType can be directly converted into DateType,
and the functions `from_unixtime` and `unix_timestamp` can be optimized
here.
Optimized result is
```
to_date(dateType)
```
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