debian-mirror-gitlab/lib/gitlab/analytics/cycle_analytics/median.rb
2020-05-24 23:13:21 +05:30

43 lines
1,004 B
Ruby

# frozen_string_literal: true
module Gitlab
module Analytics
module CycleAnalytics
class Median
include StageQueryHelpers
def initialize(stage:, query:)
@stage = stage
@query = query
end
def seconds
@query = @query.select(median_duration_in_seconds.as('median'))
result = execute_query(@query).first || {}
result['median'] || nil
end
def days
seconds ? seconds.fdiv(1.day) : nil
end
private
attr_reader :stage
def percentile_cont
percentile_cont_ordering = Arel::Nodes::UnaryOperation.new(Arel::Nodes::SqlLiteral.new('ORDER BY'), duration)
Arel::Nodes::NamedFunction.new(
'percentile_cont(0.5) WITHIN GROUP',
[percentile_cont_ordering]
)
end
def median_duration_in_seconds
Arel::Nodes::Extract.new(percentile_cont, :epoch)
end
end
end
end
end