[jira] [Created] (SPARK-14854) Left outer join produces incorrect output when the join condition does not have left table key

["kanika dhuria (JIRA)" <ji...@apache.org>]

kanika dhuria created SPARK-14854:
-------------------------------------

             Summary: 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



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