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https://issues.apache.org/jira/browse/SPARK-18163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ulrich zink closed SPARK-18163.
-------------------------------
Resolution: Invalid
> Union unexpected behaviour when generating data frames programatically
> ----------------------------------------------------------------------
>
> Key: SPARK-18163
> URL: https://issues.apache.org/jira/browse/SPARK-18163
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.1
> Reporter: Ulrich zink
>
> //expected behaviour
> val df1 = Seq((1,2),(3,4)).toDF("a","b")
> val df2 = Seq((5,6)).toDF("a","b")
> df1.union(df2).show()
> +---+---+
> | a| b|
> +---+---+
> | 1| 2|
> | 3| 4|
> | 5| 6|
> +---+---+
> // When generating the data frames programmatically
> val nInst = 2
> val fltr = 1
> case class Instrument(id: Long, value: Double)
> def dataset (nst:Int,fltrVal:Int) = sqlContext.range(0, nst).select(($"id"),
>
> round(abs(randn)).alias("value")).as[Instrument].filter('value > fltrVal)
> val df3 = dataset(nInst,fltr)
> val df4 = dataset(nInst,fltr)
> df3.show()
> df4.show()
> df3.union(df4).show()
> df3: org.apache.spark.sql.Dataset[Instrument] = [id: bigint, value: double]
> +---+-----+
> | id|value|
> +---+-----+
> | 0| 1.0|
> | 1| 1.0|
> +---+-----+
> df4: org.apache.spark.sql.Dataset[Instrument] = [id: bigint, value: double]
> +---+-----+
> | id|value|
> +---+-----+
> | 0| 1.0|
> | 1| 0.0|
> +---+-----+
> +---+-----+
> | id|value|
> +---+-----+
> | 0| 1.0|
> | 1| 1.0|
> | 0| 1.0|
> | 1| 2.0|
> +---+-----+
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