class NoSE::Cost::RequestCountCost
A cost model which estimates the number of requests to the backend
Public Instance Methods
delete_cost(step)
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Cost
estimate as number of entities deleted
# File lib/nose/cost/request_count.rb, line 22 def delete_cost(step) step.state.cardinality end
index_lookup_cost(step)
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Rough cost estimate as the number of requests made @return [Numeric]
# File lib/nose/cost/request_count.rb, line 11 def index_lookup_cost(step) # We always start with a single lookup, then the number # of lookups is determined by the cardinality at the preceding step if step.parent.is_a?(Plans::RootPlanStep) 1 else step.state.cardinality end end
insert_cost(step)
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Cost
estimate as number of entities inserted
# File lib/nose/cost/request_count.rb, line 27 def insert_cost(step) step.state.cardinality end