Gurus, I have an RDD in PySpark that I can convert to DF through df = rdd.toDF()
However, when I do df.printSchema() I see the columns as nullable. = true by default root |-- COL-1: long (nullable = true) |-- COl-2: double (nullable = true) |-- COl-3: string (nullable = true) What would be the easiest way to make COL-1 NOT NULLABLE Thanking you
