Re: Add client connection check during the execution of the query

On Fri, Apr 2, 2021 at 6:18 PM tsunakawa.takay@fujitsu.com
<tsunakawa.takay@fujitsu.com> wrote:
> The patch looks committable to me.

I checked for performance impact compared to master with pgbench -S,
and didn't see any problem.  I thought more about how to write a
decent race-free test but struggled with the lack of a good way to
control multiple connections from TAP tests and gave up for now.  I
previously tried to write something to help with that, but abandoned
it because it was terrible[1].  It seems a bit strange to me that psql
has to be involved at all, and we don't have a simple way to connect
one or more sockets and speak the protocol from perl.

Pushed!  Thanks to all who contributed.

[1] https://www.postgresql.org/message-id/CA%2BhUKG%2BFkUuDv-bcBns%3DZ_O-V9QGW0nWZNHOkEPxHZWjegRXvw%40mail.gmail.com,
see v2-0006-Add-TAP-test-for-snapshot-too-old.patch