postgresql/contrib/postgres_fdw
Tom Lane 8749d850f9 Make postgres_fdw's query_cancel test less flaky.
This test occasionally shows

+WARNING:  could not get result of cancel request due to timeout

which appears to be because the cancel request is sometimes unluckily
sent to the remote session between queries, and then it's ignored.

This patch tries to make that less probable in three ways:

1. Use a test query that does not involve remote estimates, so that
no EXPLAINs are sent.
2. Make sure that the remote session is ready-to-go (transaction
started, SET commands sent) before we start the timer.
3. Increase the statement_timeout to 100ms, to give the local
session enough time to plan and issue the query.

We might have to go higher than 100ms to make this adequately
stable in the buildfarm, but let's see how it goes.

Back-patch to v17 where this test was introduced.

Jelte Fennema-Nio and Tom Lane

Discussion: https://postgr.es/m/578934.1725045685@sss.pgh.pa.us
2024-08-30 16:47:39 -04:00
..
expected Make postgres_fdw's query_cancel test less flaky. 2024-08-30 16:47:39 -04:00
sql Make postgres_fdw's query_cancel test less flaky. 2024-08-30 16:47:39 -04:00
.gitignore Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
connection.c Make postgres_fdw request remote time zone 'GMT' not 'UTC'. 2024-04-21 13:46:20 -04:00
deparse.c Fixup various StringInfo function usages 2024-04-10 11:53:32 +12:00
Makefile postgres_fdw: Split out the query_cancel test to its own file 2024-07-22 12:49:57 +02:00
meson.build postgres_fdw: Split out the query_cancel test to its own file 2024-07-22 12:49:57 +02:00
option.c Update copyright for 2024 2024-01-03 20:49:05 -05:00
postgres_fdw--1.0--1.1.sql postgres_fdw: Add functions to discard cached connections. 2021-01-26 15:35:54 +09:00
postgres_fdw--1.0.sql Add postgres_fdw contrib module. 2013-02-21 05:27:16 -05:00
postgres_fdw.c postgres_fdw: Avoid "cursor can only scan forward" error. 2024-07-19 13:15:01 +09:00
postgres_fdw.control postgres_fdw: Add function to list cached connections to foreign servers. 2021-01-18 15:11:08 +09:00
postgres_fdw.h Make dblink interruptible, via new libpqsrv APIs. 2024-01-08 11:39:56 -08:00
shippable.c Update copyright for 2024 2024-01-03 20:49:05 -05:00