[
https://issues.apache.org/jira/browse/SPARK-12213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Davies Liu reassigned SPARK-12213:
----------------------------------
Assignee: Davies Liu
> Query with only one distinct should not having on expand
> --------------------------------------------------------
>
> Key: SPARK-12213
> URL: https://issues.apache.org/jira/browse/SPARK-12213
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
>
> Expand will double the number of records, slow down projection and
> aggregation, it's better to generate a plan without Expand for a query with
> only one distinct (for example, ss_max in TPCDS)
--
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
