Github user jiangxb1987 commented on a diff in the pull request: https://github.com/apache/spark/pull/19861#discussion_r154687413 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala --- @@ -184,9 +188,16 @@ class DataFrameReader private[sql](sparkSession: SparkSession) extends Logging { val cls = DataSource.lookupDataSource(source) if (classOf[DataSourceV2].isAssignableFrom(cls)) { - val options = new DataSourceV2Options(extraOptions.asJava) + val dataSource = cls.newInstance() + val options = dataSource match { + case cs: ConfigSupport => + val confs = withSessionConfig(cs, sparkSession.sessionState.conf) + new DataSourceV2Options((confs ++ extraOptions).asJava) --- End diff -- Good catch! Should the confs in the `extraOptions` have a higher priority? WDYT @cloud-fan ?
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