On 22.01.25 05:00, Tom Lane wrote:
Peter Eisentraut <pe...@eisentraut.org> writes:
I have committed the fix for foreign key NO ACTION (patch 0002, this did
not require patch 0001).

That commit seems to be causing occasional buildfarm failures:

https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=indri&dt=2025-01-22%2001%3A29%3A35
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=mylodon&dt=2025-01-22%2001%3A17%3A14

Both of these look like

--- 
/Users/buildfarm/bf-data/HEAD/pgsql.build/src/test/regress/expected/without_overlaps.out
    2025-01-21 20:29:36
+++ 
/Users/buildfarm/bf-data/HEAD/pgsql.build/src/test/regress/results/without_overlaps.out
     2025-01-21 20:43:08
@@ -1792,8 +1792,6 @@
    SET valid_at = CASE WHEN lower(valid_at) = '2018-01-01' THEN 
daterange('2018-01-01', '2018-01-05')
                        WHEN lower(valid_at) = '2018-02-01' THEN 
daterange('2018-01-05', '2018-03-01') END
    WHERE id = '[6,7)';
-ERROR:  update or delete on table "temporal_rng" violates RESTRICT setting of foreign key 
constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
-DETAIL:  Key (id, valid_at)=([6,7), [2018-01-01,2018-02-01)) is referenced from table 
"temporal_fk_rng2rng".
  -- a PK update that fails because both are referenced (even before commit):
  BEGIN;
    ALTER TABLE temporal_fk_rng2rng

ie, an expected error did not get thrown.

I suspect the nested locking clauses in the new SQL query in the patch. I don't see anything else in the patch that would possibly create this kind unstable behavior.

Paul, what do you think?

I'll revert the patch soon unless we have a quick fix coming.



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