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1. How to Write Spark UDFs (User Defined Functions) in Python – BMC Software | Blogs

   2021-03-18 Tags: pyspark, spark, udf, python by klotz
2. Spark UDFs, how to write them and some gotchas? – achilleus – Medium

   2019-04-25 Tags: spark, udf, scala by klotz
3. 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
4. JSONize Anything in Pig with ToJson | Hortonworks

   2014-07-23 Tags: pig, json, udf, hadoop by klotz
5. bearrito/scala-pig · GitHub

   2014-03-26 Tags: pig, scala, java, hadoop, udf by klotz
6. [PIG-2763] Groovy UDFs - ASF JIRA

   2014-03-26 Tags: pig, groovy, java, hadoop, udf by klotz
7. Algebraic Interface | O’Reilly | Programming Pig | Writing Evaluation &…

   2014-02-07 Tags: pig, algebraic, udf, hadoop by klotz
8. UDFManual - Pig Wiki

   2013-11-13 Tags: pig, java, udf by klotz
9. User Defined Functions

   2013-10-15 Tags: python, pig, udf, hadoop by klotz
10. Herding Apache Pig - using Pig with Perl and Python | Java Code Geeks

    2013-10-15 Tags: pig, hadoop, python, udf by klotz

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