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
candetect 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
chosefrom.
I'd prefer b over a.
--
Sincerely, Stephen R. van den Berg.
"And now for something *completely* different!"
