Re: [HACKERS] Partition-wise join for join between (declaratively)partitioned tables

On Wed, Sep 13, 2017 at 12:32 PM, Amit Khandekar <amitdkhan.pg@gmail.com> wrote:
> Hi,
>
> Rafia had done some testing on TPCH queries using Partition-wise join
> patch along with Parallel Append patch.
>
> There, we had observed that for query 4, even though the partition
> wise joins are under a Parallel Append, the join are all non-partial.
>
> Specifically, the partition-wise join has non-partial nested loop
> joins when actually it was expected to have partial nested loop joins.
> (The difference can be seen by the observation that the outer relation
> of that join is scanned by non-parallel Bitmap Heap scan when it
> should have used Parallel Bitmap Heap Scan).
>
> Here is the detailed analysis , including where I think is the issue :
>
> https://www.postgresql.org/message-id/CAJ3gD9cZms1ND3p%3DNN%3DhDYDFt_SeKq1htMBhbj85bOmvJwY5fg%40mail.gmail.com
>
> All the TPCH results are posted in the same above mail thread.

Can you please check if the attached patch fixes the issue.

-- 
Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company

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