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Re: make add_paths_to_append_rel aware of startup cost - Mailing list pgsql-hackers

From Thomas Munro
Subject Re: make add_paths_to_append_rel aware of startup cost
Date
Msg-id CA+hUKGLqC-NobKYfjxNM3Gexv9OJ-Fhvy9bugUcXsZjTqH7W=Q@mail.gmail.com
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In response to Re: make add_paths_to_append_rel aware of startup cost  (David Rowley <dgrowleyml@gmail.com>)
Responses Re: make add_paths_to_append_rel aware of startup cost
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On Thu, Oct 5, 2023 at 9:07 PM David Rowley <dgrowleyml@gmail.com> wrote:
> Thanks. Pushed.

FYI somehow this plan from a8a968a8212e flipped in this run:

=== dumping /home/bf/bf-build/mylodon/HEAD/pgsql.build/testrun/recovery/027_stream_regress/data/regression.diffs
===
diff -U3 /home/bf/bf-build/mylodon/HEAD/pgsql/src/test/regress/expected/union.out
/home/bf/bf-build/mylodon/HEAD/pgsql.build/testrun/recovery/027_stream_regress/data/results/union.out
--- /home/bf/bf-build/mylodon/HEAD/pgsql/src/test/regress/expected/union.out
2024-01-15 00:31:13.947555940 +0000
+++ /home/bf/bf-build/mylodon/HEAD/pgsql.build/testrun/recovery/027_stream_regress/data/results/union.out
2024-02-14 00:06:17.075584839 +0000
@@ -1447,9 +1447,9 @@
    ->  Append
          ->  Nested Loop
                Join Filter: (t1.tenthous = t2.tenthous)
-               ->  Seq Scan on tenk1 t1
+               ->  Seq Scan on tenk2 t2
                ->  Materialize
-                     ->  Seq Scan on tenk2 t2
+                     ->  Seq Scan on tenk1 t1
          ->  Result
 (8 rows)

https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=mylodon&dt=2024-02-14%2000%3A01%3A03

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