Does Sybase OpenSwitch support JDBC XA clients to Sybase DBMSes?

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04-08-2008, 06:01 PM

Joe Weinstein

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Does Sybase OpenSwitch support JDBC XA clients to Sybase DBMSes?

Hi all. I tried to find Sybase documents describing how
OpenSwitch works with JDBC clients doing XA transactions,
but there was nothing.
I suspect that if OpenSwitch fails over from one DBMS
to another, even a warm standby, during a client's ongoing
(pre-prepared) XA transaction, that transaction is defunct,
and/or the processing context is gone. Eg, if the client
is halfway through reading a cursor from a query of not-yet-
committed data from a dynamically-generated session-scoped
stored procedure, and I'd hope that the JDBC connection would
get an Exception to indicate such. What I would be scared of,
is if the under-the-covers failover was in some way 'transparent',
leaving the JDBC client to discover that they are 'not in
Kansas anymore'.

thanks much in advance,
Joe Weinstein at BEA Systems

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Does Sybase OpenSwitch support JDBC XA clients to Sybase DBMSes?