class Cardinality
Simple helper class to facilitate cardinality estimates
Public Class Methods
filter(cardinality, eq_filter, range_filter)
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Update the cardinality based on filtering implicit to the index @return [Integer]
# File lib/nose/util.rb, line 170 def self.filter(cardinality, eq_filter, range_filter) filtered = (range_filter.nil? ? 1.0 : 0.1) * cardinality filtered *= eq_filter.map do |field| 1.0 / field.cardinality end.inject(1.0, &:*) filtered end