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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2017/02/18 14:50:44 UTC

[jira] [Resolved] (SPARK-19655) select count(*) , requests 1 for each row

     [ https://issues.apache.org/jira/browse/SPARK-19655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-19655.
-------------------------------
    Resolution: Duplicate

> 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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