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module Gitlab
module CycleAnalytics
module MetricsFetcher
include Gitlab::Database::Median
include Gitlab::Database::DateTime
DEPLOYMENT_METRIC_STAGES = %i[production staging]
private
def calculate_metric(name, start_time_attrs, end_time_attrs)
cte_table = Arel::Table.new("cte_table_for_#{name}")
# Build a `SELECT` query. We find the first of the `end_time_attrs` that isn't `NULL` (call this end_time).
# Next, we find the first of the start_time_attrs that isn't `NULL` (call this start_time).
# We compute the (end_time - start_time) interval, and give it an alias based on the current
# cycle analytics stage.
interval_query = Arel::Nodes::As.new(
cte_table,
subtract_datetimes(base_query_for(name), start_time_attrs, end_time_attrs, name.to_s))
median_datetime(cte_table, interval_query, name)
end
# Join table with a row for every <issue,merge_request> pair (where the merge request
# closes the given issue) with issue and merge request metrics included. The metrics
# are loaded with an inner join, so issues / merge requests without metrics are
# automatically excluded.
def base_query_for(name)
# Load issues
query = mr_closing_issues_table.join(issue_table).on(issue_table[:id].eq(mr_closing_issues_table[:issue_id])).
join(issue_metrics_table).on(issue_table[:id].eq(issue_metrics_table[:issue_id])).
where(issue_table[:project_id].eq(@project.id)).
where(issue_table[:deleted_at].eq(nil)).
where(issue_table[:created_at].gteq(@from))
query = query.where(build_table[:ref].eq(@branch)) if name == :test && @branch
# Load merge_requests
query = query.join(mr_table, Arel::Nodes::OuterJoin).
on(mr_table[:id].eq(mr_closing_issues_table[:merge_request_id])).
join(mr_metrics_table).
on(mr_table[:id].eq(mr_metrics_table[:merge_request_id]))
if DEPLOYMENT_METRIC_STAGES.include?(name)
# Limit to merge requests that have been deployed to production after `@from`
query.where(mr_metrics_table[:first_deployed_to_production_at].gteq(@from))
end
query
end
def mr_metrics_table
MergeRequest::Metrics.arel_table
end
def mr_table
MergeRequest.arel_table
end
def mr_diff_table
MergeRequestDiff.arel_table
end
def mr_closing_issues_table
MergeRequestsClosingIssues.arel_table
end
def issue_table
Issue.arel_table
end
def issue_metrics_table
Issue::Metrics.arel_table
end
def user_table
User.arel_table
end
def build_table
::CommitStatus.arel_table
end
end
end
end
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