Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20023#discussion_r161766711
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecision.scala
---
@@ -243,17 +279,43 @@ object DecimalPrecision extends TypeCoercionRule {
// Promote integers inside a binary expression with fixed-precision
decimals to decimals,
// and fixed-precision decimals in an expression with floats / doubles
to doubles
case b @ BinaryOperator(left, right) if left.dataType !=
right.dataType =>
- (left.dataType, right.dataType) match {
- case (t: IntegralType, DecimalType.Fixed(p, s)) =>
--- End diff --
nit: I feel it's more readable to just put the new cases for literal before
these 4 cases.
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