Horton

Re: speeding up planning with partitions

Amit Langote <langote_amit_f8@lab.ntt.co.jp>

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From: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
To: David Rowley <david.rowley@2ndquadrant.com>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2018-08-30T01:10:45Z
Lists: pgsql-hackers 
On 2018/08/30 7:27, David Rowley wrote:
> On 30 August 2018 at 00:06, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp> wrote:
>> nparts  master    0001   0002   0003
>> ======  ======    ====   ====   ====
>> 0         2856    2893   2862   2816
>> 8          507    1115   1447   1872
>> 16         260     765   1173   1892
>> 32         119     483    922   1884
>> 64          59     282    615   1881
>> 128         29     153    378   1835
>> 256         14      79    210   1803
>> 512          5      40    113   1728
>> 1024         2      17     57   1616
>> 2048         0*      9     30   1471
>> 4096         0+      4     15   1236
>> 8192         0=      2      7    975
> 
> Those look promising. Are you going to submit these patches to the
> September 'fest?

Thanks, I just did.

https://commitfest.postgresql.org/19/1778/

Regards,
Amit

Commits

  1. Clean up handling of constraint_exclusion and enable_partition_pruning.

  2. Add test case exercising formerly-unreached code in inheritance_planner.

  3. Speed up planning when partitions can be pruned at plan time.

  4. Avoid crash in partitionwise join planning under GEQO.

  5. Avoid passing query tlist around separately from root->processed_tlist.

  6. Build "other rels" of appendrel baserels in a separate step.

  7. Get rid of duplicate child RTE for a partitioned table.

  8. Rearrange make_partitionedrel_pruneinfo to avoid work when we can't prune.

  9. Don't copy PartitionBoundInfo in set_relation_partition_info.

  10. Move building of child base quals out into a new function

  11. Reorganize planner code moved in b60c39759908

  12. Move inheritance expansion code into its own file

  13. Fix inherited UPDATE/DELETE with UNION ALL subqueries.

  14. Rearrange planner to save the whole PlannerInfo (subroot) for a subquery.