maropu commented on a change in pull request #28600:
URL: https://github.com/apache/spark/pull/28600#discussion_r429491977
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
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@@ -684,6 +685,24 @@ object TypeCoercion {
}
}
+ /**
+ * The DIV operator always returns long-type value .
+ * This rule cast the integral inputs to long type, to avoid overflow during
calculation.
+ */
+ object IntegralDivision extends TypeCoercionRule {
Review comment:
Plz add fine-grained tests for this rule in `TypeCoercionSuite`.
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