cloud-fan commented on code in PR #36531:
URL: https://github.com/apache/spark/pull/36531#discussion_r880623685
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala:
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@@ -275,6 +381,49 @@ object Cast {
case _ => null
}
}
+
+ // Show suggestion on how to complete the disallowed explicit casting with
built-in type
+ // conversion functions.
+ private def suggestionOnConversionFunctions (
+ from: DataType,
+ to: DataType,
+ functionNames: String): String = {
+ // scalastyle:off line.size.limit
+ s"""cannot cast ${from.catalogString} to ${to.catalogString}.
+ |To convert values from ${from.catalogString} to ${to.catalogString},
you can use $functionNames instead.
+ |""".stripMargin
+ // scalastyle:on line.size.limit
+ }
+
+ def typeCheckFailureMessage(
+ from: DataType,
+ to: DataType,
+ fallbackConfKey: Option[String],
Review Comment:
how about putting key and value together: `fallbackConf: Option[(String,
String)]`
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