Hi all, I'm using Spark 1.4.1. I create a DataFrame from json file. There is a column C that all values are null in the json file. I found that the datatype of column C in the created DataFrame is string. However, I would like to specify the column as Long when saving it as parquet file. What should I do to specify the column type when saving parquet file?
Thank you, Jyun-Fan Tsai --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org
