Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/20579#discussion_r175013773 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala --- @@ -542,6 +542,11 @@ case class DataSource( throw new AnalysisException("Cannot save interval data type into external storage.") } + if (data.schema.size == 0) { --- End diff -- Is it required? This is a behavior change. Can we exclude it from this PR?
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