Re: Re: new patch of MERGE (merge_204) & a question about duplicated ctid

On Tue, Jan 04, 2011 at 04:44:32AM -0500, Greg Smith wrote:
> Heikki Linnakangas wrote:
> >You can of course LOCK TABLE as a work-around, if that's what you want.
> 
> Presuming the code quality issues and other little quirks I've
> documented (and new ones yet to be discovered) can get resolved
> here, and that's a sizeable open question, I could see shipping this
> with the automatic heavy LOCK TABLE in there.  Then simple UPSERT
> could work out of the box via a straightforward MERGE.

How about implementing an UPSERT command as "take the lock, do the
merge?"  That way, we'd have both the simplicity for the simpler cases
and a way to relax consistency guarantees for those who would like to
do so.

Cheers,
David.
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