Horton

RE: speeding up planning with partitions

Imai, Yoshikazu <imai.yoshikazu@jp.fujitsu.com>

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From: "Imai, Yoshikazu" <imai.yoshikazu@jp.fujitsu.com>
To: "Imai, Yoshikazu" <imai.yoshikazu@jp.fujitsu.com>, 'Amit Langote' <Langote_Amit_f8@lab.ntt.co.jp>, "jesper.pedersen@redhat.com" <jesper.pedersen@redhat.com>
Cc: 'Amit Langote' <amitlangote09@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, David Rowley <david.rowley@2ndquadrant.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Justin Pryzby <pryzby@telsasoft.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2019-03-06T02:14:25Z
Lists: pgsql-hackers 
On Wed, Mar 6, 2019 at 2:10 AM, Imai, Yoshikazu wrote:
> > and Imai-san's review.  I haven't been able to pin down the bug (or
> > whatever) that makes throughput go down as the partition count
> > increases, when tested with a --enable-cassert build.
> 
> I didn't investigate that problem, but there is another memory increase
> issue, which is because of 0003 patch I think. I'll try to solve the latter
> issue.

Ah, I noticed Amit-san identified the cause of problem with --enable-cassert build just now.

--
Yoshikazu Imai

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.