Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/22450
My major concern is:
1. how to prove `Divide` is the only one having problems of negative scale?
2. how to prove the fix here is corrected and covers all the corner cases?
I'm reconsidering this proposal
```
Do you think it makes sense for
spark.sql.decimalOperations.allowPrecisionLoss to also toggle how literal
promotion happens (the old way vs. the new way)?
```
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