logging_query_plan

# File activerecord/lib/active_record/explain.rb, line 24
    def logging_query_plan # :nodoc:
      return yield unless logger

      threshold = auto_explain_threshold_in_seconds
      current   = Thread.current
      if threshold && current[:available_queries_for_explain].nil?
        begin
          queries = current[:available_queries_for_explain] = []
          start = Time.now
          result = yield
          logger.warn(exec_explain(queries)) if Time.now - start > threshold
          result
        ensure
          current[:available_queries_for_explain] = nil
        end
      else
        yield
      end
    end