cloud-fan commented on code in PR #45891:
URL: https://github.com/apache/spark/pull/45891#discussion_r1557312729
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sql/api/src/main/scala/org/apache/spark/sql/types/ArrayType.scala:
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@@ -43,6 +43,23 @@ object ArrayType extends AbstractDataType {
override private[spark] def simpleString: String = "array"
}
+/**
+ * Use AbstractArrayType(AbstractDataType) for defining expected types for
expression parameters.
+ */
+@Stable
Review Comment:
This is used by expressions to define expected types, so shouldn't be
exposed to end-users. It's more like a developer API.
Can we have a new package `org.apache.spark.sql.internal.types` to put this
class (with a new file) and also the string collation related classes?
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