Tom Lane wrote: >[ thinks for a bit... ] You could make it a change in the cancel >protocol, which is to some extent independent of the main FE/BE >protocol. The problem is: how can the client know whether it's okay to >use this new protocol for cancel?
Two options: a. Send two cancelkeys in rapid succession at session startup, whereas the first one is 0 or something. The client can detect the first "special" cancelkey and then knows that the connection supports cancelmethod 2. b. At sessionstartup, advertise a new runtimeparameter: cancelmethod=plainkey,hmaccoded which the client can then chose from. I'd prefer b over a. -- Sincerely, Stephen R. van den Berg. "And now for something *completely* different!" -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers