Horton

Re: speeding up planning with partitions

David Rowley <david.rowley@2ndquadrant.com>

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From: David Rowley <david.rowley@2ndquadrant.com>
To: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2018-08-29T22:27:09Z
Lists: pgsql-hackers 
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?


-- 
 David Rowley                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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.