cache_sql

# File activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb, line 142
        def cache_sql(sql, name, binds)
          key = binds.empty? ? sql : [sql, binds]
          result = nil
          hit = false

          @lock.synchronize do
            if (result = @query_cache.delete(key))
              hit = true
              @query_cache[key] = result
            else
              result = @query_cache[key] = yield
              if @query_cache_max_size && @query_cache.size > @query_cache_max_size
                @query_cache.shift
              end
            end
          end

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

          result.dup
        end