[ https://issues.apache.org/jira/browse/SPARK-16998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Herman van Hovell resolved SPARK-16998. --------------------------------------- Resolution: Fixed Assignee: Herman van Hovell Fix Version/s: 2.2.0 > select($"column1", explode($"column2")) is extremely slow > --------------------------------------------------------- > > Key: SPARK-16998 > URL: https://issues.apache.org/jira/browse/SPARK-16998 > Project: Spark > Issue Type: Bug > Components: SQL > Reporter: TobiasP > Assignee: Herman van Hovell > Fix For: 2.2.0 > > > Using a Dataset containing 10.000 rows, each containing null and an array of > 5.000 Ints, I observe the following performance (in local mode): > {noformat} > scala> time(ds.select(explode($"value")).sample(false, 0.0000001, 1).collect) > 1.219052 seconds > > res9: Array[org.apache.spark.sql.Row] = Array([3761], [3766], [3196]) > scala> time(ds.select($"dummy", explode($"value")).sample(false, 0.0000001, > 1).collect) > 20.219447 seconds > > res5: Array[org.apache.spark.sql.Row] = Array([null,3761], [null,3766], > [null,3196]) > {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org