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https://issues.apache.org/jira/browse/SPARK-4689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14268720#comment-14268720
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Bibudh Lahiri commented on SPARK-4689:
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I'd like to work on this issue, but would need some details. I looked into
./sql/core/src/main/scala/org/apache/spark/sql/SchemaRDD.scala where the
unionAll method is defined as
def unionAll(otherPlan: SchemaRDD) =
new SchemaRDD(sqlContext, Union(logicalPlan, otherPlan.logicalPlan))
Are we looking for an implementation of union here (keeping duplicates only
once), in addition to unionAll (keeping duplicates both the times)?
> Unioning 2 SchemaRDDs should return a SchemaRDD in Python, Scala, and Java
> --------------------------------------------------------------------------
>
> Key: SPARK-4689
> URL: https://issues.apache.org/jira/browse/SPARK-4689
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.1.0
> Reporter: Chris Fregly
> Priority: Minor
> Labels: starter
>
> Currently, you need to use unionAll() in Scala.
> Python does not expose this functionality at the moment.
> The current work around is to use the UNION ALL HiveQL functionality detailed
> here: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Union
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