Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/22208#discussion_r212785096 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -216,8 +216,16 @@ class Dataset[T] private[sql]( private[sql] def resolve(colName: String): NamedExpression = { queryExecution.analyzed.resolveQuoted(colName, sparkSession.sessionState.analyzer.resolver) .getOrElse { - throw new AnalysisException( - s"""Cannot resolve column name "$colName" among (${schema.fieldNames.mkString(", ")})""") + if (schema.fieldNames.contains(colName)) { --- End diff -- @icexelloss . This cannot handle mixed cases like the following. This should be handled for the purpose of this PR. Please use `sparkSession.sessionState.analyzer.resolver`. ```python spark.range(0, 1).toDF('A.b')['a.B'] ```
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