Hello
+my $locker = $node_sub->background_psql('postgres');
+$locker->query_until(qr/locker_ready/, qq{
+ \\echo locker_ready
+ BEGIN;
+ TRUNCATE $clt;
+});
This seems unstable to me: can't query_until return as soon as
"locker_ready" appears in the output, before the begin; truncate?