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# frozen_string_literal: true |
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module NoSE |
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module CLI |
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# Add a command to generate a graphic of the schema from a workload |
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class NoSECLI < Thor |
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desc 'plan-schema WORKLOAD SCHEMA', |
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'output plans for the given WORKLOAD using SCHEMA' |
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long_desc <<-LONGDESC |
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`nose plan-schema` produces a set of plans for the given WORKLOAD |
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using the manually-defined SCHEMA. |
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This is useful to compare manually-defined execution plans with the |
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plans that NoSE would produce for the same schema. |
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LONGDESC |
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shared_option :format |
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shared_option :mix |
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View Code Duplication |
def plan_schema(workload_name, schema_name) |
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workload = Workload.load workload_name |
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workload.mix = options[:mix].to_sym \ |
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unless options[:mix] == 'default' && workload.mix != :default |
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schema = Schema.load schema_name |
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indexes = schema.indexes.values |
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# Build the statement plans |
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cost_model = get_class_from_config options, 'cost', :cost_model |
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planner = Plans::QueryPlanner.new workload, indexes, cost_model |
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trees = workload.queries.map { |q| planner.find_plans_for_query q } |
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plans = trees.map(&:min) |
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update_plans = build_update_plans workload.statements, indexes, |
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workload.model, trees, cost_model |
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# Construct a result set |
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results = plan_schema_results workload, indexes, plans, update_plans, |
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cost_model |
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# Output the results in the specified format |
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send(('output_' + options[:format]).to_sym, results) |
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end |
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private |
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# Construct a result set |
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# @return [OpenStruct] |
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def plan_schema_results(workload, indexes, plans, update_plans, |
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cost_model) |
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results = OpenStruct.new |
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results.workload = workload |
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results.indexes = indexes |
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results.enumerated_indexes = [] |
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results.plans = plans |
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results.update_plans = update_plans |
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results.cost_model = cost_model |
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results.weights = workload.statement_weights |
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results.total_size = results.indexes.sum_by(&:size) |
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results.total_cost = plans.sum_by { |plan| plan.cost * plan.weight } |
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results |
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end |
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# Produce all update plans for the schema |
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# @return [Array<Plans::UpdatePlan>] |
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def build_update_plans(statements, indexes, model, trees, cost_model) |
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planner = Plans::UpdatePlanner.new model, trees, cost_model |
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update_plans = [] |
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statements.each do |statement| |
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next if statement.is_a? Query |
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planner.find_plans_for_update(statement, indexes).each do |plan| |
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plan.select_query_plans(indexes) |
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update_plans << plan |
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end |
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end |
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update_plans |
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end |
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end |
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end |
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end |
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michaelmior /
NoSE
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