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https://issues.apache.org/jira/browse/SPARK-14854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15272865#comment-15272865
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kanika dhuria commented on SPARK-14854:
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Why do you think they are same issue? I was expecting all left table data
when the join condition is false. Even when I have condition like
$"num1".===(lit(10)), result is empty.
> Left outer join produces incorrect output when the join condition does not
> have left table key
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-14854
> URL: https://issues.apache.org/jira/browse/SPARK-14854
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.5.1
> Reporter: kanika dhuria
>
> import org.apache.spark.sql._
> import org.apache.spark.sql.types._
> val s = StructType(StructField("num", StringType, true)::Nil)
> val s1 = StructType(StructField("num1", StringType, true)::Nil)
> val m =
> sc.textFile("file:/tmp/master.txt").map(_.split(",")).map(p=>Row(p(0)))
> val d =
> sc.textFile("file:/tmp/detail.txt").map(_.split(",")).map(p=>Row(p(0)))
> val m1 = sqlContext.createDataFrame(m, s1)
> val d1 = sqlContext.createDataFrame(d, s)
> val j1 = d1.join(m1,$"num1".===(lit(null)),"left_outer");
> j1.take(1)
> Returns empty data set. Left table has data.
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