|Subject||Re: [Firebird-Architect] Re: Can we, can we, can we????...|
> >>However, it is possible to send interruption request using theThen why hasn't it been created yet?
> >>original socket. I even believe it can be done in the current SS
> >>listener without mass modification. Current TCP listener
> >>implementation receives and dispatches packets asynchronously of
> >>other threads executing them. So it can happily receive
> >>request and notify the worker thread to stop.
> >>The client side should use some per-socket synchronization to keep
> >>data separate and submit cancel requests from a different thread
> >>since the primary thread is blocked.
> > Not without redesigning the wire protocol, server code, and remote
> > interface and changing the layering within the server. It also
> Nothing has to be redesigned, really. In theory, there should appear
> new message type in remote protocol, but the existing one for
> isc_free_statement () could fit. Overall client interface change is
> indeed adding a new constant in ibase.h as Borland did. BTW, as far
> as I understand, IB6.5 still opens separate connection to cancel
> > precludes extending the interruption mechanism to let a dba kill
> > selected requests.
> Interruption mechanism in the engine is the same
> (gds_cancel_operation) and it is operational for a few years,
> however, only for SuperServer. The absent part is the means of
> delivery of the cancel request from a client to server. Cancelling
> users' own queries is easy and can be done over a weekend.
Heck, the feature has been sponsored for once - someone had
made a time-estimation for it ...
But it all ended there.
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