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Tags: udf* + scala*

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1. Spark UDFs, how to write them and some gotchas? – achilleus – Medium

   2019-04-25 Tags: spark, udf, scala by klotz
2. Explode (transpose?) multiple columns in Spark SQL table - Stack Overflow

   import org.apache.spark.sql.functions.{udf, explode}
   
   val zip = udf((xs: Seq Long » , ys: Seq Long » ) => xs.zip(ys))
   
   df.withColumn("vars", explode(zip_udf($"varA", $"varB"))).select(
   $"userId", $"someString",
   $"vars._1".alias("varA"), $"vars._2".alias("varB")).show

   2017-03-09 Tags: spark, scala, zip, udf by klotz
3. bearrito/scala-pig · GitHub

   2014-03-26 Tags: pig, scala, java, hadoop, udf by klotz

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