[
https://issues.apache.org/jira/browse/HIVE-12615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15048371#comment-15048371
]
Nemon Lou commented on HIVE-12615:
----------------------------------
[~xuefuz] Thanks for your attention .It's a good idea to show the parallelism
in "explain extended".
I will provide a patch which prevent unnecessary spark session creation when
explain without extended .
> Do not start spark session when only explain
> ---------------------------------------------
>
> Key: HIVE-12615
> URL: https://issues.apache.org/jira/browse/HIVE-12615
> Project: Hive
> Issue Type: Improvement
> Components: Spark
> Affects Versions: 1.3.0, 2.1.0
> Reporter: Nemon Lou
>
> When using beeline -e "set hive.execution.engine=spark;explain select
> count(*) from sometable",it's very slow due to starting of spark session on
> yarn.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
