Horton

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

Mithun Cy <mithun.cy@enterprisedb.com>

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From: Mithun Cy <mithun.cy@enterprisedb.com>
To: Alexander Korotkov <a.korotkov@postgrespro.ru>
Cc: Robert Haas <robertmhaas@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2017-03-20T07:01:22Z
Lists: pgsql-hackers 
On Mon, Feb 27, 2017 at 8:29 PM, Alexander Korotkov
<a.korotkov@postgrespro.ru> wrote:

This patch needs to be rebased.

1. It fails while applying as below

patching file src/test/regress/expected/sysviews.out
Hunk #1 FAILED at 70.
1 out of 1 hunk FAILED -- saving rejects to file
src/test/regress/expected/sysviews.out.rej
patching file src/test/regress/sql/inherit.sql

2. Also, there are compilation errors due to new commits.

-fwrapv -fexcess-precision=standard -O2 -I../../../../src/include
-D_GNU_SOURCE   -c -o createplan.o createplan.c
createplan.c: In function ‘create_gather_merge_plan’:
createplan.c:1510:11: warning: passing argument 3 of ‘make_sort’ makes
integer from pointer without a cast [enabled by default]
           gm_plan->nullsFirst);
           ^
createplan.c:235:14: note: expected ‘int’ but argument is of type ‘AttrNumber *’
 static Sort *make_sort(Plan *lefttree, int numCols, int skipCols,
              ^
createplan.c:1510:11: warning: passing argument 4 of ‘make_sort’ from
incompatible pointer type [enabled by default]
           gm_plan->nullsFirst);

-- 
Thanks and Regards
Mithun C Y
EnterpriseDB: http://www.enterprisedb.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.