Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/13730#discussion_r67477579
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
---
@@ -351,8 +354,10 @@ private[sql] object PartitioningUtils {
}
}
- if (partitionColumns.size == schema.fields.size) {
- throw new AnalysisException(s"Cannot use all columns for partition
columns")
+ if (schema.fields.isEmpty) {
--- End diff --
Its weird that a check like this is in the PartitioningUtils. This check
seems nothing to do with partitioning, as its basically certain file formats
that do not support writing a DF with no columns. Is there somewhere earlier
where you can check this?
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