SPARK: How to parse a Array of JSON object using Spark

Question

I have a file with normal columns and a column that contains a Json string which is as below. Also picture attached. Each row actually belongs to a column named Demo(not Vis

Answer 1

Aleh thank you for answer.It works fine. I did the solution in slightly different way because I am using 2.3.3 spark.

val sch = ArrayType(StructType(Array(
  StructField("key", StringType, true),
  StructField("value", StringType, true)
)))

val jsonDF3 = mdf.select(from_json(col("jsonString"), sch).alias("Demographics"))

val jsonDF4 = jsonDF3.withColumn("device_kind", expr("Demographics[0].value"))
  .withColumn("country_code", expr("Demographics[1].value"))
  .withColumn("device_platform", expr("Demographics[2].value"))