ask Spark"DataFrame to edit only one column (intercept a paragraph) and return a new DataFrame
ask Spark"DataFrame to edit only one column (intercept a paragraph) and return a new DataFrame
you can map
val session = SparkSession.builder().config(sc).getOrCreate()
try {
val df = session.read.json("file:\\\\\\E:/anc.json")
.map(new MapFunction[Row, String] {
override def call(value: Row): String = {
value.getAs[Long]("id").toString.substring(0, 1)
}
}, Encoders.STRING)
df.show()
} finally {
session.close()
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