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# frozen_string_literal: true
module Gitlab
module Analytics
module CycleAnalytics
module StageEvents
# Base class for expressing an event that can be used for a stage.
class StageEvent
include Gitlab::CycleAnalytics::MetricsTables
extend Gitlab::Utils::Override
delegate :label_based?, to: :class
def initialize(params)
@params = params
end
def self.name
raise NotImplementedError
end
def markdown_description
self.class.name
end
def self.identifier
raise NotImplementedError
end
def object_type
raise NotImplementedError
end
# Each StageEvent must expose a timestamp or a timestamp like expression in order to build a range query.
# Example: get me all the Issue records between start event end end event
def timestamp_projection
raise NotImplementedError
end
# List of columns that are referenced in the `timestamp_projection` expression
# Example timestamp projection: COALESCE(issue_metrics.created_at, issue_metrics.updated_at)
# Expected column list: issue_metrics.created_at, issue_metrics.updated_at
def column_list
[]
end
# Optionally a StageEvent may apply additional filtering or join other tables on the base query.
def apply_query_customization(query)
query
end
def self.label_based?
false
end
private
attr_reader :params
end
end
end
end
end
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