On Wed, Aug 15, 2012 at 12:14 PM, Heikki Linnakangas
<heikki.linnakangas@enterprisedb.com> wrote:
Histogram of upper bounds would be both more
accurate and natural for some operators. However, it requires collecting
additional statistics while AFAICS it doesn't liberate us from having
histogram of range lengths.
Ok, we've to decide if we need "standard" histogram. In some cases it can be used for more accurate estimation of < and > operators.
But I think it is not so important. So, we can replace "standard" histogram with histograms of lower and upper bounds?
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With best regards,
Alexander Korotkov.