Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/22450#discussion_r218762046
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecision.scala
---
@@ -129,16 +129,17 @@ object DecimalPrecision extends TypeCoercionRule {
resultType)
case Divide(e1 @ DecimalType.Expression(p1, s1), e2 @
DecimalType.Expression(p2, s2)) =>
+ val adjP2 = if (s2 < 0) p2 - s2 else p2
--- End diff --
sure, but if you agree I'll try and find a better place than
`DataFrameSuite`. I'd prefer adding the new tests to
`ArithmeticExpressionSuite`. Is that ok for you?
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