Asks the server to cancel the statement c is running, as libpq's PQcancel does. Meant for
another fiber than the one waiting for the statement (a signal handler's, say): the waiting
call then returns the server's "canceling statement due to user request". Does nothing useful
when no statement is running.
- c: the connection whose statement is to be stopped.
cancel_query :: (c: *Connection) -> Pg_ErrorAsks the server to cancel the statement c is running, as libpq's PQcancel does. Meant for
another fiber than the one waiting for the statement (a signal handler's, say): the waiting
call then returns the server's "canceling statement due to user request". Does nothing useful
when no statement is running.
Parameters
- c: *Connection
- the connection whose statement is to be stopped.