HaoYang670 commented on issue #4191:
URL:
https://github.com/apache/arrow-datafusion/issues/4191#issuecomment-1314694661
Not sure, but I wonder could we support this is logical phase?
Given the following 2 lemmas:
```coq
1. forall source: FloatArray, round(source) = round(source, 0)
2. forall source: FloatArray n: IntArray,
round(source, n) = div(
round(mul(
source,
pow(10, n))),
pow(10, n))
```
we can unfold the `round` function in the logical plan stage and don't need
to modify the physical stage.
One concern here is that `Decimal` type might be better than `Float` type
because we've found some corner cases in floating point multiplication and
division:
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
