cloud-fan commented on a change in pull request #27499: [SPARK-30590][SQL]
Untyped select API cannot take typed column expression that needs input type
URL: https://github.com/apache/spark/pull/27499#discussion_r383721848
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File path: sql/core/src/main/scala/org/apache/spark/sql/Column.scala
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@@ -97,6 +97,17 @@ class TypedColumn[-T, U](
new TypedColumn[T, U](newExpr, encoder)
}
+ /**
+ * This method is used internally in SparkSQL to check if a `TypedColumn`
has been inserted with
+ * specific input type and schema by `withInputType`.
+ */
+ private[sql] def needInputType: Boolean = {
+ expr.find {
+ case ta: TypedAggregateExpression if ta.inputDeserializer.isEmpty => true
Review comment:
nit: `case ta: TypedAggregateExpression => ta.inputDeserializer.isEmpty`
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