[
https://issues.apache.org/jira/browse/SPARK-12989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-12989:
------------------------------------
Assignee: (was: Apache Spark)
> Bad interaction between StarExpansion and ExtractWindowExpressions
> ------------------------------------------------------------------
>
> Key: SPARK-12989
> URL: https://issues.apache.org/jira/browse/SPARK-12989
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Michael Armbrust
>
> Reported initially here:
> http://stackoverflow.com/questions/34995376/apache-spark-window-function-with-nested-column
> {code}
> import sqlContext.implicits._
> import org.apache.spark.sql.functions._
> import org.apache.spark.sql.expressions.Window
> sql("SET spark.sql.eagerAnalysis=false") // Let us see the error even though
> we are constructing an invalid tree
> val data = Seq(("a", "b", "c", 3), ("c", "b", "a", 3)).toDF("A", "B", "C",
> "num")
> .withColumn("Data", struct("A", "B", "C"))
> .drop("A")
> .drop("B")
> .drop("C")
> val winSpec = Window.partitionBy("Data.A", "Data.B").orderBy($"num".desc)
> data.select($"*", max("num").over(winSpec) as "max").explain(true)
> {code}
> When you run this, the analyzer inserts invalid columns into a projection, as
> seen below:
> {code}
> == Parsed Logical Plan ==
> 'Project [*,'max('num) windowspecdefinition('Data.A,'Data.B,'num
> DESC,UnspecifiedFrame) AS max#64928]
> +- Project [num#64926,Data#64927]
> +- Project [C#64925,num#64926,Data#64927]
> +- Project [B#64924,C#64925,num#64926,Data#64927]
> +- Project
> [A#64923,B#64924,C#64925,num#64926,struct(A#64923,B#64924,C#64925) AS
> Data#64927]
> +- Project [_1#64919 AS A#64923,_2#64920 AS B#64924,_3#64921 AS
> C#64925,_4#64922 AS num#64926]
> +- LocalRelation [_1#64919,_2#64920,_3#64921,_4#64922],
> [[a,b,c,3],[c,b,a,3]]
> == Analyzed Logical Plan ==
> num: int, Data: struct<A:string,B:string,C:string>, max: int
> Project [num#64926,Data#64927,max#64928]
> +- Project [num#64926,Data#64927,A#64932,B#64933,max#64928,max#64928]
> +- Window [num#64926,Data#64927,A#64932,B#64933],
> [HiveWindowFunction#org.apache.hadoop.hive.ql.udf.generic.GenericUDAFMax(num#64926)
> windowspecdefinition(A#64932,B#64933,num#64926 DESC,RANGE BETWEEN UNBOUNDED
> PRECEDING AND CURRENT ROW) AS max#64928], [A#64932,B#64933], [num#64926 DESC]
> +- !Project [num#64926,Data#64927,A#64932,B#64933]
> +- Project [num#64926,Data#64927]
> +- Project [C#64925,num#64926,Data#64927]
> +- Project [B#64924,C#64925,num#64926,Data#64927]
> +- Project
> [A#64923,B#64924,C#64925,num#64926,struct(A#64923,B#64924,C#64925) AS
> Data#64927]
> +- Project [_1#64919 AS A#64923,_2#64920 AS
> B#64924,_3#64921 AS C#64925,_4#64922 AS num#64926]
> +- LocalRelation
> [_1#64919,_2#64920,_3#64921,_4#64922], [[a,b,c,3],[c,b,a,3]]
> {code}
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