spark-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Raajay <raaja...@gmail.com>
Subject Re: Join Order Optimization
Date Mon, 12 Oct 2015 02:16:34 GMT
Hi Cheng,

Could you point me to the JIRA that introduced this change ?

Also, is this SPARK-2211 the right issue to follow for cost-based
optimization?

Thanks
Raajay



On Sun, Oct 11, 2015 at 7:57 PM, Cheng, Hao <hao.cheng@intel.com> wrote:

> Spark SQL supports very basic join reordering optimization, based on the
> raw table data size, this was added couple major releases back.
>
>
>
> And the “EXPLAIN EXTENDED query” command is a very informative tool to
> verify whether the optimization taking effect.
>
>
>
> *From:* Raajay [mailto:raajay.v@gmail.com]
> *Sent:* Sunday, October 11, 2015 9:22 AM
> *To:* user@spark.apache.org
> *Subject:* Join Order Optimization
>
>
>
> Hello,
>
> Does Spark-SQL support join order optimization as of the 1.5.1 release ?
> From the release notes, I did not see support for this feature, but figured
> will ask the users-list to be sure.
>
> Thanks
>
> Raajay
>

Mime
View raw message