Re: pgsql: Refactor all TAP test suites doing connection checks

What does seem to fix it reliably is the attached.

            regards, tom lane

diff --git a/src/test/perl/PostgresNode.pm b/src/test/perl/PostgresNode.pm
index bbde34c..07a9167 100644
--- a/src/test/perl/PostgresNode.pm
+++ b/src/test/perl/PostgresNode.pm
@@ -1938,7 +1938,7 @@ sub connect_fails
     # have set up things properly, and this should not block.
     my ($ret, $stdout, $stderr) = $self->psql(
         'postgres',
-        "SELECT \$\$connected with $connstr\$\$",
+        undef, # don't try to send a query
         extra_params => ['-w'],
         connstr      => "$connstr");