14.02.2017 18:15, Rader, David: [...]
Try the libpq call from pg_isready. It does actually make a round trip to the postgres server and asks the server if it is ready to accept connections. So you are running the socket communication code of postgres and a small bit of "status" check but not any sql.
Indeed, such function is available. But essentially, this function is a (kind of) combined login+logout, therefore it would not work for my purpose. (Despite its name, it can not be used to perform some communication "ping" within an established session, such thing simply does not exist in the protocol, at least as of 9.5)
Regards, Nikolai
from mirror: https://github.com/postgres/postgres/blob/master/src/bin/scripts/pg_isready.c relevant call is PQping: rv = PQpingParams(keywords, values, 1);
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