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Revert "Allow parallel workers to cope with a newly-created session user ID."

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This reverts commit f5f30c22ed69fb37b896c4d4546b2ab823c3fd61.

Some buildfarm animals are failing with "cannot change
"client_encoding" during a parallel operation".  It looks like
assign_client_encoding is unhappy at being asked to roll back a
client_encoding setting after a parallel worker encounters a
failure.  There must be more to it though: why didn't I see this
during local testing?  In any case, it's clear that moving the
RestoreGUCState() call is not as side-effect-free as I thought.
Given that the bug f5f30c22e intended to fix has gone unreported
for years, it's not something that's urgent to fix; I'm not
willing to risk messing with it further with only days to our
next release wrap.
This commit is contained in:
Tom Lane
2024-07-31 20:53:33 -04:00
parent ca2eea3ac8
commit e6a9637488
4 changed files with 6 additions and 43 deletions
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9
src/test/regress/sql/select_parallel.sql
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@ -511,12 +511,3 @@ SELECT 1 FROM tenk1_vw_sec
WHERE (SELECT sum(f1) FROM int4_tbl WHERE f1 < unique1) < 100;
rollback;
-- test that a newly-created session role propagates to workers.
begin;
create role regress_parallel_worker;
set session authorization regress_parallel_worker;
select current_setting('session_authorization');
set debug_parallel_query = 1;
select current_setting('session_authorization');
rollback;