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From "Yin Huai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-15114) Column name generated by typed aggregate is super verbose
Date Wed, 04 May 2016 06:57:12 GMT
Yin Huai created SPARK-15114:
--------------------------------

             Summary: Column name generated by typed aggregate is super verbose
                 Key: SPARK-15114
                 URL: https://issues.apache.org/jira/browse/SPARK-15114
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Yin Huai
            Priority: Critical


{code}
case class Person(name: String, email: String, age: Long)
val ds = spark.read.json("/tmp/person.json").as[Person]
import org.apache.spark.sql.expressions.scala.typed._
ds.groupByKey(_ => 0).agg(sum(_.age))
// org.apache.spark.sql.Dataset[(Int, Double)] = [value: int, typedsumdouble(unresolveddeserializer(newInstance(class
Person), age#0L, email#1, name#2), upcast(value)): double]

ds.groupByKey(_ => 0).agg(sum(_.age)).explain

== Physical Plan ==
WholeStageCodegen
:  +- TungstenAggregate(key=[value#84], functions=[(TypedSumDouble($line15.$read$$iw$$iw$Person),mode=Final,isDistinct=false)],
output=[value#84,typedsumdouble(unresolveddeserializer(newInstance(class $line15.$read$$iw$$iw$Person),
age#0L, email#1, name#2), upcast(value))#91])
:     +- INPUT
+- Exchange hashpartitioning(value#84, 200), None
   +- WholeStageCodegen
      :  +- TungstenAggregate(key=[value#84], functions=[(TypedSumDouble($line15.$read$$iw$$iw$Person),mode=Partial,isDistinct=false)],
output=[value#84,value#97])
      :     +- INPUT
      +- AppendColumns <function1>, newInstance(class $line15.$read$$iw$$iw$Person),
[input[0, int] AS value#84]
         +- WholeStageCodegen
            :  +- Scan HadoopFiles[age#0L,email#1,name#2] Format: JSON, PushedFilters: [],
ReadSchema: struct<age:bigint,email:string,name:string>
{code}



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