cloud-fan commented on a change in pull request #21599: [SPARK-26218][SQL]
Overflow on arithmetic operations returns incorrect result
URL: https://github.com/apache/spark/pull/21599#discussion_r305356186
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
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@@ -89,5 +95,5 @@ case class Sum(child: Expression) extends
DeclarativeAggregate with ImplicitCast
)
}
- override lazy val evaluateExpression: Expression = sum
+ override lazy val evaluateExpression: Expression = castToResultType(sum)
Review comment:
We can inline the logic of `castToResultType` here, as `evaluateExpression`
is a lazy val.
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