Method: NoSE::Plans::PlanStep#parent_steps

Defined in:
lib/nose/plans.rb

#parent_steps(cost_model = nil) ⇒ QueryPlan

Get the list of steps which led us here If a cost model is not provided, statement plans using this step cannot be evaluated on the basis of cost

(this is to support PlanStep#parent_index which does not need cost)

Returns:



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# File 'lib/nose/plans.rb', line 52

def parent_steps(cost_model = nil)
  steps = nil

  if @parent.nil?
    steps = QueryPlan.new state.query, cost_model
  else
    steps = @parent.parent_steps cost_model
    steps << self
  end

  steps
end