Hi, How to convert a Dataset<Row> to a Dataset<String>? What i have tried is:
List<String> list = dataset.as(Encoders.STRING()).collectAsList(); Dataset<String> datasetSt = spark.createDataset(list, Encoders.STRING()); // But this line raises a org.apache.spark.sql.AnalysisException: Try to map struct... to Tuple1, but failed as the number of fields does not line up Type of columns being String How to solve this?
