osdir.com

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: JoinPushThroughJoinRule and JoinAssociateRule in calcite


According to my testing, some join configurations are unreachable by
default rules, here is a bug about it with a possible cause suggestion:
https://issues.apache.org/jira/browse/CALCITE-2666

On Tue, Nov 20, 2018 at 8:07 AM Wang, Ken <mingmwang@xxxxxxxx.invalid>
wrote:

> Hi, Julian
>
> I’m reading Apache Calcite source code. There are some rules for Join
> order enumeration: JoinPushThroughJoinRule, JoinCommuteRule and
> JoinAssociateRule.
> By default, JoinAssociateRule is disabled.
>
> Does JoinPushThroughJoinRule + JoinCommuteRule prove to be complete to
> generate all the search space for Join ordering?
> And why we prefer use JoinPushThroughJoinRule instead of JoinAssociateRule?
>
> Thanks
> Ken
>
>

-- 
Best regards,
Anton.