On Mon, Nov 26, 2012 at 3:05 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> The analogy to other aggregates is probably a better thing to argue
> from. On the other hand, I don't know anyone outside the SQL standards
> committee who thinks it's actually a good idea that SUM() across no rows
> returns null rather than zero.
Me neither.
--
Robert Haas
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