cache_sql

# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 289
        def cache_sql(sql, name, binds)
          key = binds.empty? ? sql : [sql, binds]
          result = nil
          hit = true

          @lock.synchronize do
            result = query_cache.compute_if_absent(key) do
              hit = false
              yield
            end
          end

          if hit
            ActiveSupport::Notifications.instrument(
              "sql.active_record",
              cache_notification_info(sql, name, binds)
            )
          end

          result.dup
        end