Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17758#discussion_r125889801
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -422,6 +405,18 @@ case class DataSource(
s"$className is not a valid Spark SQL Data Source.")
}
+ (relation match {
+ case hs: HadoopFsRelation =>
+ Some((hs.dataSchema.map(_.name), hs.partitionSchema.map(_.name)))
+ case bs: BaseRelation =>
+ Some((bs.schema.map(_.name), Seq.empty[String]))
+ case _ =>
+ None
+ }).foreach { case (dataCols, partCols) =>
+ SchemaUtils.checkColumnNameDuplication(dataCols, "in the data
schema", equality)
+ SchemaUtils.checkColumnNameDuplication(partCols, "in the partition
column(s)", equality)
--- End diff --
can we just inline these 2 checks in the above 2 cases?
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