Github user yhuai commented on a diff in the pull request: https://github.com/apache/spark/pull/14207#discussion_r73940350 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/command/createDataSourceTables.scala --- @@ -95,17 +95,39 @@ case class CreateDataSourceTableCommand( } // Create the relation to validate the arguments before writing the metadata to the metastore. - DataSource( - sparkSession = sparkSession, - userSpecifiedSchema = userSpecifiedSchema, - className = provider, - bucketSpec = None, - options = optionsWithPath).resolveRelation(checkPathExist = false) + val dataSource: BaseRelation = + DataSource( + sparkSession = sparkSession, + userSpecifiedSchema = userSpecifiedSchema, + className = provider, + bucketSpec = None, + options = optionsWithPath).resolveRelation(checkPathExist = false) + + val partitionColumns = if (userSpecifiedSchema.nonEmpty) { + userSpecifiedPartitionColumns + } else { + val res = dataSource match { + case r: HadoopFsRelation => r.partitionSchema.fieldNames + case _ => Array.empty[String] + } + if (userSpecifiedPartitionColumns.length > 0) { --- End diff -- Should we throw an exception for this case?
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