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From VJ Anand <vjan...@sankia.com>
Subject Re: Join Order Optimization
Date Mon, 12 Oct 2015 03:42:55 GMT
Hi - Is there a design document for those operations that have been
implemented in 1.4.0? if so,where can I find them
-VJ

On Sun, Oct 11, 2015 at 7:27 PM, Cheng, Hao <hao.cheng@intel.com> wrote:

> Yes, I think the SPARK-2211 should be the right place to follow the CBO
> stuff, but probably that will not happen right away.
>
>
>
> The jira issue introduce the statistic info can be found at:
>
> https://issues.apache.org/jira/browse/SPARK-2393
>
>
>
> Hao
>
>
>
> *From:* Raajay [mailto:raajay.v@gmail.com]
> *Sent:* Monday, October 12, 2015 10:17 AM
> *To:* Cheng, Hao
> *Cc:* user@spark.apache.org
> *Subject:* Re: Join Order Optimization
>
>
>
> 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
>
>
>



-- 
*VJ Anand*
*Founder *
*Sankia*
vjanand@sankia.com
925-640-1340
www.sankia.com

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