Class: MongoClarify::Investigate

Inherits:
Object
  • Object
show all
Defined in:
lib/mongo_clarify/investigate.rb

Instance Method Summary collapse

Constructor Details

#initialize(explain) ⇒ Investigate

Returns a new instance of Investigate.



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# File 'lib/mongo_clarify/investigate.rb', line 9

def initialize(explain)
  @explain = explain
end

Instance Method Details

#execution_stats ⇒ Object 



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# File 'lib/mongo_clarify/investigate.rb', line 26

def execution_stats
  match(@explain) do
    with(Hash.(executionStats: Hash.(nReturned: n, executionTimeMillis: msec, totalKeysExamined: keys, totalDocsExamined: docs))) do
      {
        n_returned: n,
        execution_time_millis: msec,
        total_keys_examined: keys,
        total_docs_examined: docs
      }
    end
  end
rescue PatternMatch::NoMatchingPatternError
  nil
end

#operation_method ⇒ Object 



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# File 'lib/mongo_clarify/investigate.rb', line 13

def operation_method
  match(@explain) do
    with(Hash.(queryPlanner: Hash.(winningPlan: Hash.(stage: 'COLLSCAN')))) do
      'Collection Scan'
    end
    with(Hash.(queryPlanner: Hash.(winningPlan: Hash.(stage: 'FETCH', inputStage: Hash.(stage: 'IXSCAN', indexName: index_name))))) do
      "Index Scan (Index Name: #{index_name})"
    end
  end
rescue PatternMatch::NoMatchingPatternError
  nil
end