Probably you have to read the source code, I am not sure if there are any .ppt
or slides.
Hao
From: VJ Anand [mailto:vjan...@sankia.com]
Sent: Monday, October 12, 2015 11:43 AM
To: Cheng, Hao
Cc: Raajay; user@spark.apache.org
Subject: Re: Join Order Optimization
Hi - Is there a design document
eng, 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?
>
>
, 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
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 wrote:
> Spark SQL supports very basic join reordering optimization, based on the
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:raaja...@gmail.com]
