Horton

Re: [PATCH] Incremental sort (was: PoC: Partial sort)

Shaun Thomas <shaun.thomas@2ndquadrant.com>

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From: Shaun Thomas <shaun.thomas@2ndquadrant.com>
To: Dmitry Dolgov <9erthalion6@gmail.com>
Cc: Alexander Korotkov <a.korotkov@postgrespro.ru>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, James Coleman <jtc331@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, PostgreSQL Developers <pgsql-hackers@lists.postgresql.org>
Date: 2019-03-29T19:25:03Z
Lists: pgsql-hackers 
Another ping on this Incremental Sort patch.

Alexander, you'd noted that you would try to get it into subsequent
Commit Fests with improvements you've been considering, but I don't
see it in anything but 2018-11. Have you abandoned this as a
maintainer? If so, it would be nice to know so someone else can pick
it up.

-- 
Shaun M Thomas - 2ndQuadrant
PostgreSQL Training, Services and Support
shaun.thomas@2ndquadrant.com | www.2ndQuadrant.com

Commits

  1. Further adjustments to Hashagg EXPLAIN ANALYZE output

  2. Rework EXPLAIN format for incremental sort

  3. Fix typos and improve incremental sort comments

  4. Stabilize incremental_sort tests

  5. Minor improvements in Incremental Sort explain

  6. Consider Incremental Sort paths at additional places

  7. Fix representation of SORT_TYPE_STILL_IN_PROGRESS.

  8. Fix failures in incremental_sort due to number of workers

  9. Fix show_incremental_sort_info with force_parallel_mode

  10. Implement Incremental Sort

  11. Fix handling of "Subplans Removed" field in EXPLAIN output.

  12. Fix EXPLAIN (SETTINGS) to follow policy about when to print empty fields.

  13. Ensure plpgsql result tuples have the right composite type marking.

  14. Propagate sort instrumentation from workers back to leader.

  15. Make new regression test case parallel-safe, and improve its output.

  16. Push limit through subqueries to underlying sort, where possible.

  17. Fix inappropriate printing of never-measured times in EXPLAIN.

  18. Fix some infelicities in EXPLAIN output for parallel query plans.