cloud-fan commented on code in PR #36698:
URL: https://github.com/apache/spark/pull/36698#discussion_r890146130
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/decimalExpressions.scala:
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@@ -232,3 +216,33 @@ case class CheckOverflowInSum(
override protected def withNewChildInternal(newChild: Expression):
CheckOverflowInSum =
copy(child = newChild)
}
+
+/**
+ * An add expression which is only used internally by Sum/Avg.
+ *
+ * Nota that, this expression does not check overflow which is different with
`Add`.
+ */
+case class DecimalAddNoOverflowCheck(
+ left: Expression,
+ right: Expression,
+ override val dataType: DataType,
+ failOnError: Boolean = SQLConf.get.ansiEnabled) extends BinaryArithmetic {
+ require(dataType.isInstanceOf[DecimalType])
+
+ override def nullable: Boolean = super[BinaryArithmetic].nullable
Review Comment:
if `failOnError` returns true, this expression can only return null if input
is null?
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