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Posted to issues@spark.apache.org by "kanika dhuria (JIRA)" <ji...@apache.org> on 2016/04/22 21:20:12 UTC
[jira] [Updated] (SPARK-14854) Left outer join produces incorrect
output when the join condition does not have left table key
[ https://issues.apache.org/jira/browse/SPARK-14854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
kanika dhuria updated SPARK-14854:
----------------------------------
Description:
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,$"num1".===(lit(null)),"left_outer");
j1.take(1)
Returns empty data set. Left table has data.
was:
import org.apache.spark.sql._
import org.apache.spark.sql.types._
val s = StructType(StructField("num", StringType, true)::Nil)
val s1 = StructType(StructField("num1", StringType, true)::Nil)
val m = sc.textFile("file:/tmp/master.txt").map(_.split(",")).map(p=>Row(p(0)))
val d = sc.textFile("file:/tmp/detail.txt").map(_.split(",")).map(p=>Row(p(0)))
val m1 = sqlContext.createDataFrame(m, s1)
val d1 = sqlContext.createDataFrame(d, s)
val j1 = d1.join(m1,$"num1".===(lit(null)),"left_outer");
j1.take(1)
Returns empty data set
> Left 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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