Github user tedyu commented on a diff in the pull request: https://github.com/apache/spark/pull/9940#discussion_r51284828 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala --- @@ -359,6 +361,18 @@ object StructType extends AbstractDataType { protected[sql] def fromAttributes(attributes: Seq[Attribute]): StructType = StructType(attributes.map(a => StructField(a.name, a.dataType, a.nullable, a.metadata))) + def removeMetadata(key: String, dt: DataType): DataType = + dt match { + case StructType(fields) => + val newFields = fields.map { f => + val mb = new MetadataBuilder() --- End diff -- This workaround may be taken out in the future. However, use of MetadataBuilder occurs in many other places: http://pastebin.com/nVjNfrgp I feel adding clear() to MetadataBuilder would help in current and future use cases.
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