Spark hive udf: no handler for UDAF analysis exception

[Swapnil Chougule]

Created one project 'spark-udf' & written hive udf as below:

    package com.spark.udf
    import org.apache.hadoop.hive.ql.exec.UDF

    class UpperCase extends UDF with Serializable {
      def evaluate(input: String): String = {
        input.toUpperCase
      }

Built it & created jar for it. Tried to use this udf in another spark
program:

    spark.sql("CREATE OR REPLACE FUNCTION uppercase AS
'com.spark.udf.UpperCase' USING JAR
'/home/swapnil/spark-udf/target/spark-udf-1.0.jar'")

But following line is giving me exception:

    spark.sql("select uppercase(Car) as NAME from cars").show

*Exception:*

> Exception in thread "main" org.apache.spark.sql.AnalysisException: No
> handler for UDAF 'com.dcengines.fluir.udf.Strlen'. Use
> sparkSession.udf.register(...) instead.; line 1 pos 7     at
>
org.apache.spark.sql.catalyst.catalog.SessionCatalog.makeFunctionExpression(SessionCatalog.scala:1105)
>     at
>
org.apache.spark.sql.catalyst.catalog.SessionCatalog$$anonfun$org$apache$spark$sql$catalyst$catalog$SessionCatalog$$makeFunctionBuilder$1.apply(SessionCatalog.scala:1085)
>     at
>
org.apache.spark.sql.catalyst.catalog.SessionCatalog$$anonfun$org$apache$spark$sql$catalyst$catalog$SessionCatalog$$makeFunctionBuilder$1.apply(SessionCatalog.scala:1085)
>     at
>
org.apache.spark.sql.catalyst.analysis.SimpleFunctionRegistry.lookupFunction(FunctionRegistry.scala:115)
>     at
>
org.apache.spark.sql.catalyst.catalog.SessionCatalog.lookupFunction(SessionCatalog.scala:1247)
>     at
>
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$$anonfun$apply$16$$anonfun$applyOrElse$6$$anonfun$applyOrElse$52.apply(Analyzer.scala:1226)
>     at
>
org.apache.spark.sql.catalyst.analysis.Analyzer$ResolveFunctions$$anonfun$apply$16$$anonfun$applyOrElse$6$$anonfun$applyOrElse$52.apply(Analyzer.scala:1226)
>     at
>
org.apache.spark.sql.catalyst.analysis.package$.withPosition(package.scala:48)

Any help around this is really appreciated.