Volker.Lendecke at SerNet.DE
Mon Oct 30 17:12:30 GMT 2006
On Mon, Oct 30, 2006 at 03:30:48PM +0300, Alexander Bokovoy wrote:
> When speaking of "conditional append" where do the condition function
> has to be executed? The operation itself is initiated on a client side
> but result should affect the node which is authoritative for the data
> (DMASTER), thus where this condition is checked?
My understanding is that this is a property of the database
as such. Share modes have their rules, as do byte range
locks and possibly others.
This logic (essentially the share_mode_conflict loop) has to
be coded in the DMASTER, and it needs to be aware about the
DB semantics. Not nice and clean, but fast :-)
P.P.S: This was a JOKE! :-)
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