Gavin Sherry wrote:
> > I don't think we should use the spec syntax until we're prepared to
> > meet the spec semantics, so NEXT VALUE FOR as part of the current patch
> > seems "out".
>
> Well, AFAICT, the only part of the spec we cannot implement is what you
> quote above. Therefore, why can't we support NEXT VALUE FOR seqname and
> reject table creation/alteration which would add more than one reference
> to the same sequence. That will allow us to avoid an intermediate step
> in getting to the SQL2003 syntax. Having to support three different
> sequence incrementation mechanisms for three flavours of PostgreSQL is
> going to be a real PITA.
Oh, if we went in that direction, how would we fix loading previous
dumps? Isn't NEXT VALUE for going to map internally to the
early-binding version of nextval(). I am thinking mucking with
nextval() and its casts is going to be required for ALTER SCHEMA RENAME
to work with any kind of reliability.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
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