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Posted to user@hive.apache.org by "wangzhenhua (G)" <wa...@huawei.com> on 2015/06/17 03:12:00 UTC

hive cbo calciteplanner

Hi all,

I'm reading the source code of Hive cbo (CalcaitePlanner), but I find it hard to follow.
Listed below are some of the questions:
1. What's the relationship between HepPlanner and HiveVolcanoPlanner?
2. I don't have a clue about these concepts: clusters, traitDef and collectGarbage().

Thanks for any help.

________________________________
best regards,
-zhenhua

Re: hive cbo calciteplanner

Posted by "@Sanjiv Singh" <sa...@gmail.com>.

+ Dev

Regards
Sanjiv Singh
Mob :  +091 9990-447-339

On Wed, Jun 17, 2015 at 6:42 AM, wangzhenhua (G) <wa...@huawei.com>
wrote:

>  Hi all,
>
>  I'm reading the source code of Hive cbo (CalcaitePlanner), but I find it
> hard to follow.
> Listed below are some of the questions:
> 1. What's the relationship between HepPlanner and HiveVolcanoPlanner?
> 2. I don't have a clue about these concepts: clusters, traitDef and
> collectGarbage().
>
>  Thanks for any help.
>
>  ------------------------------
>  best regards,
> -zhenhua
>