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# frozen_string_literal: true
module Gitlab
module Database
module Subquery
class << self
def self_join(relation)
t = relation.arel_table
# Work around a bug in Rails 5, where LIMIT causes trouble
# See https://gitlab.com/gitlab-org/gitlab-ce/issues/51729
r = relation.limit(nil).arel
r.take(relation.limit_value) if relation.limit_value
t2 = r.as('t2')
relation.unscoped.joins(t.join(t2).on(t[:id].eq(t2[:id])).join_sources.first)
end
end
end
end
end
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