Tom Lane wrote:
Bruce Momjian <[EMAIL PROTECTED]> writes:
Tom Lane wrote:
Has anyone bothered to measure the overhead added by having to mask to
fetch or store the natts value?  This is not a zero-cost improvement.


I haven't tested it. Agreed, it does add an AND operation to places where t_natts is accessed.

Tom, how should this be tested?  I assume some loop of the same query
over and over again.

I'd be satisfied by a demonstration of no meaningful difference in
pgbench numbers.

It's *probably* not a problem, but you never know if you don't check...

I doubt there's any measurable difference, but I can do a pgbench run to make sure.

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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