Horton

Re: Partition-wise aggregation/grouping

Jeevan Chalke <jeevan.chalke@enterprisedb.com>

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From: Jeevan Chalke <jeevan.chalke@enterprisedb.com>
To: Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2017-09-12T12:51:13Z
Lists: pgsql-hackers 
On Tue, Sep 12, 2017 at 3:24 PM, Rajkumar Raghuwanshi <
rajkumar.raghuwanshi@enterprisedb.com> wrote:

>
> On Fri, Sep 8, 2017 at 5:47 PM, Jeevan Chalke <jeevan.chalke@enterprisedb.
> com> wrote:
>
>> Here are the new patch-set re-based on HEAD (f0a0c17) and
>> latest partition-wise join (v29) patches.
>>
>
> Hi Jeevan,
>
> I have started testing partition-wise-aggregate and got one observation,
> please take a look.
> with the v2 patch, here if I change target list order, query is not
> picking full partition-wise-aggregate.
>

Thanks Rajkumar for reporting this.

I am looking into this issue and will post updated patch with the fix.

Thanks & Regards,
> Rajkumar Raghuwanshi
> QMG, EnterpriseDB Corporation
>
>
>
>

-- 
Jeevan Chalke
Principal Software Engineer, Product Development
EnterpriseDB Corporation
The Enterprise PostgreSQL Company

Commits

  1. postgres_fdw: Push down partition-wise aggregation.

  2. Remove 'target' from GroupPathExtraData.

  3. Implement partition-wise grouping/aggregation.

  4. Don't pass the grouping target around unnecessarily.

  5. Determine grouping strategies in create_grouping_paths.

  6. Defer creation of partially-grouped relation until it's needed.

  7. Split create_grouping_paths into degenerate and non-degenerate cases.

  8. Pass additional arguments to a couple of grouping-related functions.

  9. Fix logic error in add_paths_to_partial_grouping_rel.

  10. Minor cleanup of code related to partially_grouped_rel.

  11. Add a new upper planner relation for partially-aggregated results.

  12. Charge cpu_tuple_cost * 0.5 for Append and MergeAppend nodes.

  13. Rename enable_partition_wise_join to enable_partitionwise_join

  14. Factor some code out of create_grouping_paths.

  15. Pad XLogReaderState's main_data buffer more aggressively.

  16. Prevent int128 from requiring more than MAXALIGN alignment.

  17. Fix DROP SUBSCRIPTION hang

  18. Inject $(ICU_LIBS) regardless of platform.

  19. Some preliminary refactoring towards partitionwise join.