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Posted to issues@spark.apache.org by "Cheng Hao (JIRA)" <ji...@apache.org> on 2014/08/25 10:34:58 UTC

[jira] [Updated] (SPARK-3198) Generates the expression id while necessary

     [ https://issues.apache.org/jira/browse/SPARK-3198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cheng Hao updated SPARK-3198:
-----------------------------

    Summary: Generates the expression id while necessary  (was: Improve the expression id generation algorithm)

> Generates the expression id while necessary
> -------------------------------------------
>
>                 Key: SPARK-3198
>                 URL: https://issues.apache.org/jira/browse/SPARK-3198
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Cheng Hao
>
> Currently, Catalyst harnesses the AtomicLong for the expression id generation algorithm, which reduce the performance dramatically in a multithread env.



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