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From "hosein (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19655) select count(*) , requests 1 for each row
Date Sat, 18 Feb 2017 11:03:44 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15873110#comment-15873110
] 

hosein commented on SPARK-19655:
--------------------------------

I connect  to Vertica by JDBC and downloaded it's driver from this link:
https://my.vertica.com/download/vertica/client-drivers/


> select count(*) , requests 1 for each row
> -----------------------------------------
>
>                 Key: SPARK-19655
>                 URL: https://issues.apache.org/jira/browse/SPARK-19655
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: hosein
>            Priority: Minor
>
> when I want query select count( * ) by JDBC and monitor queries in database side, I see
spark requests: select 1 for destination table
> it means 1 for each row and it is not optimized



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