cb.aggregation().setRequestedAt_DateHistogram(SearchLogPager.LOG_TYPE_SEARCH_USER_HOUR, op -> {
                    op.calendarInterval(DateHistogramInterval.HOUR);
                    op.subAggregation(AggregationBuilders.cardinality(USER_INFO_ID).field(USER_INFO_ID));
                    op.minDocCount(0);
                    op.order(BucketOrder.key(true));
                }, null);
            });